2018-2019 annual report · 2018-2019 annual report, july 1st, 2019 ... r/c frame structure with...

2018-2019 Annual Report, July 1st, 2019

University of Nevada, Reno Student Chapter of the Earthquake Engineering Research Institute page 1

2018-2019 ANNUAL REPORT

University of Nevada Reno Student Chapter

of the Earthquake Engineering Research Institute

Report Date: July 1st, 2019

This report summarizes the membership and activities conducted by the University of Nevada, Reno Student

Chapter of the Earthquake Engineering Research Institute during the 2018-2019 academic year.

MISSION & GOALS

The Earthquake Engineering Research Institute at University of Nevada Reno (EERI@UNR) student chapter was

established in October 2000. The main objective of our chapter is to encourage and engage students’ interest

in earthquake engineering through increased awareness, personal interaction and information exchange

between research and professional engineering practice, while providing context to the earthquake

engineering education they may have been exposed to. Our chapter mission is to promote a world in which

potential earthquake risk and losses are understood and steps taken to reduce them to an acceptable level.

The goals of EERI@UNR is to reduce the earthquake risk by (1) advancing the science and practice of

earthquake engineering, (2) improving understanding of the impact of earthquakes on the physical, social,

economic, political and cultural environment.

MEMBERSHIP

The University of Nevada Reno Student Chapter had a total of 21 active members in 2018-2019.

OFFICERS

The Board consisted of the following members:

Role Name EERI Member Number

Email Student Status

President Ali Hammad 20135 [email protected]

Graduate student

Secretary Luna Nurdianti Ngeljaratan

19776 [email protected]

Graduate student

Treasurer Elif Ecem BAS 21633 [email protected]

Graduate student

Historian Negar Naeim 19402 [email protected]

Graduate student

Board meetings were held once in a month or as needed.

FACULTY & INDUSTRY ADVISORS

Faculty advisor: Mohamed A. Moustafa, Ph.D., P.E. Assistant Professor, Assistant Professor, University of Nevada

Reno Email address: [email protected]

mailto:[email protected]







MEMBERS

A complete list of members is shown below.

Name EERI Member Number

Email Student Status

Ali Hammad 20135 [email protected]

Graduate student

Luna Nurdianti Ngeljaratan

19776 [email protected]

Graduate student

Elif Ecem BAS 21633 [email protected]

Graduate student

Negar Naeim 19402 [email protected]

Graduate student

Janae Johnston 18563 [email protected] Graduate student

Jared Jones [email protected]

Graduate student

Elmira Shoushtari [email protected]

Graduate student

Ecem Ozsahin [email protected]

Graduate student

Mojtaba Alian [email protected]

Graduate student

Mohammad Abbasi

[email protected]

Graduate student

Jose Benjamin Royero

[email protected]

Graduate student

Swasti Saxena [email protected]

Graduate student

Hamed Hasani [email protected]

Graduate student

Mohsen Azimi [email protected]

Graduate student

Azin Ghaffari

[email protected]

Graduate student

Mahmood Aboukifa [email protected]

Graduate student

Mohamed Aboukifa [email protected]

Graduate student

Taylor Schwartz [email protected]

Graduate student

Rushil Mojidra [email protected]

Graduate student

Deependra Subedi [email protected]

Graduate student

Blake Schmitt [email protected]

Graduate student

CHAPTER ACTIVITIES

REGULAR CHAPTER MEETINGS

Throughout the year, we hosted the EERI@UNR Seminar Series, which we consider to be our regular chapter

meetings. The seminars consist of lectures in broad areas of earthquake engineering that include, but not

limited to, structural engineering, geotechnical engineering, seismology, geophysics, and socio-economics.

Presenters are nationally- and internationally-recognized experts in their fields. The list of the presenters is given

below and the flyer of the seminar is provided in the attachment.
























Date Guest Speaker & Institution Title

Friday, Sep

21st, 2018

Ramin Motamed Associate Professor,

Department of Civil &

Environmental Engineering,

University of Nevada Reno

Review of U.S. Code-Based Design

Recommendations for Kinematic SSI

Friday, Sep

28th, 2018

Ian Buckle Foundation Professor,

Department of Civil &

Environmental Engineering,


Design and Construction of a Large

Laminar Soil Box and High Performance

Shake Table for the Experimental

Simulation of Soil-Structure-Interaction

During Earthquakes

Tuesday,

Oct 16th,

2018

Koichi Kusunoki Professor, Earthquake

Research Institute, The

University of Tokyo

E‐Defense shaking table test of 3‐story

R/C frame structure with pile foundation

Friday, Nov

2nd, 2018

John Anderson Professor, Department of

Earth Sciences and

Engineering,


Probabilistic seismic hazard analysis for

the United States: UCERF3 Made

Accessible

Friday, Nov

16th, 2018

Robert J. Connor 2018 AISC T.R. Higgins

Lectureship Award, , Professor

of Civil Engineering

Director of the S-BRITE Center,

Purdue University

Towards an Integrated Fracture-control

Plan for Steel Bridges

Friday, Nov

16th, 2018

Shideh Dashti Associate Professor,

Geotechnical Engineering

and Geomechanics,

Civil, Environmental, and

Architectural Engineering,

University of Colorado Boulder

Physics-Informed Semi-Empirical

Probabilistic Models for Predicting

Building Settlement and Tilt on Liquefiable

Ground

Friday, Nov

30th, 2018

Jeff Crosier, S.E. Senior Principal at Miyamoto

International

Cool Projects in the "Real World"

Wednesday,

Jan 23rd,

2019

Esmaeilzadeh

Seylabi, Ph.D.

Postdoctoral Scholar

California Institute of

Technology

Physics-based data-informed

engineering for infrastructure systems

resilience*

Monday,

Jan 28th,

2019

Maha Kenawy,

Ph.D.

University of California, Davis From Localized Damage to Global

Structural Collapse: Advancing Multiscale

Hazard-Based Computational Modeling

of Civil Structures*

Thursday,

Jan 31st,

2019

Ehsan Dehghan-

Niri, Ph.D.

Assistant Professor,

Department of Civil

Engineering, New Mexico

State University

Ultrasound-based Structural Health

Monitoring: localization, diagnosis, and

prognosis challenges*

Monday,

Feb 4th,

2019

Ann Sychterz, Ph.D. Postdoctoral Researcher

University of Michigan

Adaptation and learning following

damage of a full-scale deployable

tensegrity structure using biologically-

inspired behavior*

Tuesday,

Feb 5th,

2019

Floriana Petrone,

Ph.D.

Research Scientist,

Lawrence Berkeley National

Laboratory

Methodologies and Tools for Enanching

the Resilience of Communities to Extreme

Events*

Wednesday,

Feb 6th,

2019

Hamed Ebrahimian,

Ph.D., P.E.

Senior Engineer

SC Solutions, Inc.

Mechanistic Digital Twins: The Integration

of Mechanics-Based Models with Data

and its Application to Smart Monitoring,

Management, and Disaster Resilience of

Civil Infrastructures*



Date Guest Speaker & Institution Title

Thursday,

Feb 7th,

2019

Hassene Hasni,

Ph.D.

Postdoctoral Research

Associate

Michigan State University

Long-Term Assessment of Critical

Infrastructures using Ultra-Low Power

Wireless Sensors*

Tuesday,

April 9th,

2019

Masoud Motavalli Head, Structural Engineering

Research Laboratory, Empa,

Switzerland

Development and application of shape

memory alloys for Civil Engineering

structures

*flyers not included

FRIEDMAN FAMILY VISITING PROFESSIONAL or DISTINGUISHED LECTURE VISIT , March 1 s t 2019

Professional Bio

David Friedman is a Senior Principal, and emeritus President, CEO and Board Chair of Forell/Elsesser Engineers

Inc., with over 40 years of professional practice (35 years at F/E!) in structural and earthquake engineering. His

strength, gained over the breadth and depth of his career, is a holistic perspective of a projects’ planning,

design and construction and the collaborative integration of creative structural solutions with architects,

engineers and builders.

With a specialty in seismic engineering and retrofitting of existing structures, particularly those with historic

designation, David has solved numerous structural and earthquake engineering challenges during his career

with Forell/Elsesser Engineers. Principal examples of his projects include the base isolation retrofits of San

Francisco City Hall and the Asian Art Museum, the adaptive reuse and retrofit for the San Francisco

Conservatory of Music, and the seismic safety corrections and remodeling of UC Berkeley’s California Memorial

Stadium.

David is devoted to world-wide seismic risk reduction and is a former director of the Earthquake Engineering

Research Institute, and a current director of Build Change. He is also deeply involved in many other civic,

philanthropic and not-for-profit Boards including The San Francisco Foundation, SPUR, UC Berkeley Foundation,

Jewish Senior Living Group, Faultline Foundation and the United States Resiliency Council (USRC).

Visit ing Professional Lecture Overview

In the first part of the lecture, besides introducing himself and his career path, Mr. Friedman also briefly

presented some big earthquakes which affecting his professional career. From San Fernando/Sylmar in 1971,

Loma Prieta in 1989, Kobe in 1994, Banda Aceh in 2004, until Christchurch and Tohoku in 2011 were some of the

earthquake and tsunami events in which he involved in EERI-Learning from Earthquake projects. These events

affected his interest more about earthquakes and provided him with a new perspective related to earthquake

reliefs. Christchurch in 2011 for example, even though the country already had good structural engineers and

updated building codes but severe damages were still unescapable. Therefore, he sees earthquake more as a

multidisciplinary event since earthquake event involves not only structural, earthquake, and geotechnical

engineers but also environmental, social science as well as other disciplines as an integral chain in the disaster

preparedness, recovery as well as in risk reduction efforts.

Sharing about his professional perspectives about problems being faced by structural engineers was the

second part of the lecture. As a structural engineer himself, he stated that a good structural engineer was also

a good earthquake engineer and he defined the profession (i.e. structural engineer) in such a unique way. For

him, structural engineer is “the art of molding materials we do not entirely understand, into shapes we cannot

precisely analyze, so as to withstand forces we cannot really assess, in such a way that the community at large

has no reason to suspect the extent of our ignorance.” Unreliable building codes, construction phasing,



sequence, and administration as well as sustainability and communication were some problems that we, as

structural engineer, should deal throughout our professional career. Building codes, for example, they were

designed as a life safety code without any definition/description related to reliability. We need more resilient

codes to control/to specify damages, so that our structures may operate quicker after an earthquake.

Irregular/contemporary buildings, the more preferable shape mostly for the architects, were also challenging in

the design and analysis, as our recent codes were not specifically prepared for the irregularity of the structures.

The last part of the lecture was about two interesting projects related to seismic retrofit that he was involved in

several years ago. The first project was the seismic retrofit of San Francisco city hall, which was retrofitted using

almost 438 elastomeric bearing. Isolating structure using elastomeric bearing or other base-isolation system was

still the most effective way to dissipate seismic energy, according to his professional experience. Fixed-based

structure, with high inter-story drifts, causes more structural damages as compared to the base-isolated ones.

With base-isolated structure, longer period is obtained, causing the structure to perform more flexible during

earthquake. The second project was the UC Berkeley memorial stadium, which was designed by John Galen

Howard. It was located at the base of the Berkeley Hills directly at the mouth of Strawberry Canyon and

because the approximate location of the Hayward Fault, it was potential for significant earthquakes. Therefore,

in early 2010 the University’s Board of Regents approved the retrofit plan and the complete renovation of the

stadium. During this reconstruction, which cost an estimated $445 million, the stadium was entirely gutted. Only

the exterior wall had to be left untouched because of the stadium’s status as a protected landmark. The

bleachers and all athletic and spectator facilities were completely rebuilt according to the latest seismic

mitigation techniques. The old press box was demolished and a new structure built in its place, independent of

the rest of the stadium.

UNR-Earthquake Laboratory Visit

The visit was started with the tour of UNR-Earthquake Engineering laboratory facilities and was guided by Prof.

Ian G Buckle, Ph.D., the Foundation Professor of the Department of Civil, Structural, and Environmental

Engineering of UNR. The facility was a home to three biaxial shake tables as well as one 6-degree-of-freedom

table. The building included 29,000 square feet of new laboratory, office and auditorium space. The currently-

under construction large-scale soil box facility located at the Large-scale Structure Laboratory was also shown

to the visitor. The U.S. Department of Energy (DOE) funded the project and it was a multi-institutional project to

investigate SSI effects in nuclear facilities. The fabrication was a 400-ton, laminar, biaxial soil box and

corresponding shake table, which would be used to explore SSI phenomena at a scale not currently possible in

the U.S., and to validate the ESSI nonlinear computational framework, developed by UC Davis.

Meeting with Graduate Students

The meeting with graduate students was started directly after the laboratory visit. About eleven students (i.e. 8

graduate students, a postdoctoral fellow student and 2 visiting scholars) attended the meeting. The purposes of

the meeting were to introduce EERI organization as most of the students were coming from overseas, to share

the visitor experience related to his professional career, and to inform students more about EERI Student

Chapter and other EERI activities. The meeting was started by students introduction, who mostly came from

earthquake-countries, then continued by presenting their research activities as well as their future career goals.

The visitor also shared his own experience about how EERI changed his life and recommended the students to

get involve more in EERI student chapter or other EERI-related activities. Therefore, the students would get

expose more into multidisciplinary activities in earthquake engineering since the earthquake preparedness,

recovery and risk reduction were not a stand-alone effort but a world-wide effort from multidisciplinary

research/subjects.



SEISMIC DESIGN COMPETITION TEAM

In the School of Engineering, there are several project-oriented teams that are created for undergraduate

students to learn and compete. While there are many disciplines covered in these project teams, the SDC

Team is the first of its kind at UNR to study earthquakes and compete in a structural design competition. The

purpose of the Seismic Design Team at University of Nevada Reno is to create a competitive format in an area

of engineering that the school had not been active since 2013. The University of Nevada, Reno sent its first SDC

team in 2008 to the annual competition. Ever since, our participation and growth have been a continuous

effort in order to pass along the knowledge and areas of improvement to future teams. At the 65th EERI annual

meeting in Seattle, the 2013 SDC team placed 11th out of 38 teams, which was the highest of teams that did

not withstand the most intense motion. Moving forward, the SDC team continues to learn from the experience,

while promoting the competition and recruiting members to strengthen the team. This year, University of

Nevada Reno was able to participate once again in the SDC and hopefully, we would be competing again

next year.

SDC Team Members

Currently, Janae Johnston is the president of seismic competition team. EERI member number: 18563; Email

address: [email protected]. The team members are William Roser ([email protected], Team Leader),

Adam Doodokyan, Scott de Guzman, Rowland Perez, Adolfo Gaeta, Andy Stephenson, Ashton Hunter, and

Adiba Anjum.

Team results and lessons learned

On the day of shaking, our team was thrilled to see our building stand through both ground motions. We

thought for our first year back, the team also performed well in the other categories, including, presentation,

poster and architecture. We learned a lot from our time in the competition this year and are excited to be

returning next year. Being apart of this team increased the interest in earthquake engineering of all the team

members involved and we are excited to learn more in the future! Results of the competition can be found

here https://slc.eeri.org/sdc-2019-final-results/ and the complete scores are provided in this link

https://slc.eeri.org/wp-content/uploads/2019/04/2019_Score_Sheet-2.pdf.



https://slc.eeri.org/sdc-2019-final-results/

https://slc.eeri.org/wp-content/uploads/2019/04/2019_Score_Sheet-2.pdf



LIST OF ATTACHMENTS

Included at the end of this report are various attachments to supplement the information included above. A

list of the attachments is included below:

• Item 1, activities in frames

• Item 2, flyer for event

Earthquake Engineering

Research Institute

Guest Speaker:

EERI@UNR Student Chapter Seminar Series

For More Information Contact: President, Ali HammadDepartment of Civil and Environmental Engineering

Office: EEL, 3rd floor, Phone: 775-737-6996, E-mail: [email protected]

“Review of U.S. Code-Based Design Recommendations for Kinematic SSI”

Friday, September 21, 2018 12:00 PM

EEL auditorium

Abstract:

This presentation first describes the Soil-Structure-Interaction (SSI) phenomenon

including inertial and kinematic components, then focuses on the key components of the

kinematic SSI. The details on how kinematic SSI is incorporated in one of the U.S. design

codes (i.e. ASCE 41) are then discussed.

The code-based recommendations in ASCE 41 are explained in detail followed by an

example calculation based on a case study of an instrumented building in Japan. An

additional example is illustrated based on a historical building retrofitting project in San

Francisco, CA. The presentation concludes with highlighting some of the limitations and

advantages of the current code-based practice.

Ramin Motamed, Ph.D., P.E.

Associate Professor, Department of Civil & Environmental Engineering



Research Institute

Guest Speaker:




“Design and Construction of a Large Laminar Soil Box and High Performance Shake

Table for the Experimental Simulation of Soil-Structure-Interaction During Earthquakes”

Friday, September 28, 2018 12:00 PM

EEL auditorium

Abstract:

It has been observed in the past, that certain types of structures, such as those with massive

embedded foundations, are large enough to affect the response of the soil around them

during an earthquake, and modify the ground shaking these structures must withstand.

Despite this known phenomenon, soil-structure-interaction (SSI) is poorly understood and

not well quantified. In an attempt to gain a better understanding the U.S. Department of

Energy has funded a multi-year, collaborative research project to investigate SSI at nuclear

facilities. Principal partners in the project include the Lawrence Berkeley National Lab

(LBNL), University of California Davis (UCD), and University of Nevada Reno (UNR).

Group leaders are David McCallen (LBNL), Boris Jeremic (UCD), and Ian Buckle (UNR).

The team at UNR is responsible for the design and construction of a large, biaxial, laminar

soil box and a dedicated shake table. It is also responsible for the conduct of a series of

large-scale SSI experiments using the new facility.

Currently under construction in the Large-Scale Structures Laboratory, this box is an

octagon in plan with a ‘diameter’ of about 22ft. It will be 15 ft tall and hold up to 350 tons

of soil. As such it will be the second largest, biaxial, laminar box in the world when

completed. This seminar will cover some of the design challenges in a box of this size and

the extensive numerical modeling undertaken to resolve some of these challenges. Current

progress with construction will be presented.

Ian Buckle

Foundation Professor, Department of Civil & Environmental Engineering



Research Institute

Guest Speaker:




“E‐Defense shaking table test of 3‐story R/C frame structure with pile foundation”

Tuesday, October 16, 2018 11:00 AM

EEL auditorium

Abstract:

During the presentation, a shaking table test with 3-story R/C specimen with pile foundation

by using E-Defense, which is the largest shaking table in the world, will be presented. The

test result will be compared with the result with fixed condition (W/O pile foundation) to

discuss on the soil-structure interaction. A structural health monitoring system was

developed and applied for the specimen to evaluate the suffered damage level soon after

each shaking. The evaluation results will be also presented. Finally, another shaking table

test that will be conducted in 2019 on the E-Defense shaking table will be briefly

introduced.

Koichi KusunokiProfessor

Earthquake Research Institute, the University of Tokyo

Biography:

Dr. Kusunoki is a Professor at the Earthquake Research Institute, the University of Tokyo.

He received his BS, MS, and PhD degrees from The University of Tokyo in 1992, 1994 and 1997, respectively.

He currently serves as the Secretary General of International Association for Earthquake Engineering.

His main research areas include 1) Structural Behavior of Reinforced Concrete, 2) Structural Health Monitoring, 3)

Seismic Design, and 4) Field investigation in earthquake affected area.

He has received several prestigious awards such as “Excellence Award of Technical Design Competition of

Architectural Institute of Japan” (Architectural Institute of Japan, AIJ), “Encouraging Prize” (AIJ) and “Encouraging

Prize” (JCI).


Research Institute

Guest Speaker:




“Probabilistic seismic hazard analysis for the United States:

UCERF3 Made Accessible”

Friday, November 2, 2018 12:00 PM

EEL auditorium

Abstract:

The U.S National Seismic Hazard Model is the result of a large, community effort,

incorporating contributions from scientists and engineers throughout the country and

beyond. Perhaps the most complex, and most “radical”, contribution in 2014 is the Uniform

California Earthquake Rupture Forecast, UCERF3. Like its predecessor UCERF2 that was

used for the 2008 National Seismic Hazard Map, this model identifies possible earthquakes

on the faults in California. However, unlike UCERF2 that identifies a few hundred potential

earthquakes, UCERF3 identifies more than 300,000 possible earthquakes, and estimates the

rate for each of them. We have heard from the engineering community that this complexity

makes UCERF3 difficult to use. This seminar will explain UCERF3 and how easy it is to

use, show sample applications, and also evaluate the model for some locations where its

predictions can be tested.

John Anderson

Professor, Department of Earth Sciences and Engineering


Research Institute

Guest Speaker:




“Towards an Integrated Fracture-control Plan for Steel Bridges”


EEL auditorium

Abstract:

There has been considerable research and interest in the topic of fracture-critical members (FCMs) during the past

decade. As a result, the entire concept of what constitutes a FCM is being revisited and many long-standing ideas and

opinions related to this classification of members is being shown to be overly conservative. Significant advances in

the understanding of fracture mechanics, material and structural behavior, fatigue crack initiation, fatigue crack

growth, fabrication technology, and inspection technology have allowed other industries to address fracture in a more

integrated manner. After years of research, new stand-alone AASHTO-ready guide specifications that give codified

direction on how to perform 3D system analysis to verify system redundancy, as well as guide specifications to

evaluate internal member-level redundancy of mechanically-fastened built-up members, have now been developed

and adopted by AASHTO. Additional research demonstrating the benefits of exploiting the improved toughness of

modern HPS grades of steel has been completed. Through these advances, it is now possible to create an integrated

FCP, combining the original intent of the 1978 FCP, with modern materials, design, fabrication, and inspection

methodologies. Further, an integrated FCP will provide economic benefits and improved safety to owners by

allowing for a better allocation of resources by setting inspection intervals and scope based on sound engineering

rather than based simply on the calendar. In summary, an integrated FCP encompassing material, design, fabrication,

and inspection can make fracture no more likely than any other limit state; ultimately, allowing for a better allocation

of owner resources and increased steel bridge safety. This presentation presents background to the current views of

FCMs and suggestions about how to move forward.

Bio: Robert J. Connor is a Professor of Civil Engineering and is Director of the S-BRITE Center, at Purdue University. Dr. Connor has been

working in the area of fatigue, fracture, and other performance and durability issues related to steel bridges for over 25 years. He has published

articles in conference proceedings and technical journals, mostly related to fatigue and fracture issues in steel structures, field inspection, and

failure investigations. Dr. Connor has been the principal investigator on a number of NCHRP Projects, having successfully completed five (5)

NCHRP Projects as PI and three as Co-PI. Dr. Connor’s research interests include fatigue and fracture of steel structures, field testing and

remote monitoring of structures, bridge inspection reliability, and risk-based inspection methods. He was the recipient of the George S.

Richardson Medal in 2016, an AISC Special Achievement Award in 2012, and was the first recipient of the Robert J. Dexter Memorial Lecture

Award in 2005. In 2018, he was selected by AISC to receive the T.R. Higgins Lectureship Award.

Robert J. Connor2018 AISC T.R. Higgins Lectureship Award

Professor of Civil Engineering

Director of the S-BRITE Center

Purdue University


Research Institute

Guest Speaker:




“Physics-Informed Semi-Empirical Probabilistic Models for Predicting Building Settlement

and Tilt on Liquefiable Ground”

Friday, November 16, 2018 10:00 AM

SEM 234

Abstract:

This presentation introduces predictive models for the seismic settlement and tilt of shallow-founded

structures on liquefiable ground based on an integrated observational, experimental, numerical, and

statistical approach. Effective liquefaction mitigation requires an improved understanding of the

consequences of liquefaction on structures. The state of practice typically involves estimating building

settlement using empirical procedures for free-field conditions, which have been shown to be unreliable

and inappropriate through previous case histories and physical model studies. To address this problem,

first, a series of centrifuge experiments were performed to evaluate the dominant mechanisms of

deformation near shallow-founded structures. Second, experimental results were used to evaluate the

predictive capabilities of 3D, fully-coupled, nonlinear, dynamic finite element analyses of soil-structure

systems in OpenSees. Third, a numerical parametric study (exceeding 63,000 simulations) was used to

identify the most optimum Intensity Measures for permanent building settlement and tilt as well as the

functional form of predictive models. And finally, a case history database helped validate and refine the

models, accounting for field complexities not captured numerically or experimentally. This integrative

approach yielded a set of procedures that are the first to consider variations in soil layering and geometry,

foundation and structure properties (in 3D), soil-structure interaction, and total model uncertainties all of

which are necessary to realize the benefits of performance-based seismic design in evaluating and

mitigating the liquefaction hazard.

Bio: Shideh Dashti is an Associate Professor in Geotechnical Engineering and Geomechanics at the University of Colorado Boulder (CU).

She obtained her undergraduate degree at Cornell University and graduate degrees at the University of California, Berkeley. She worked briefly

with ARUP (New York City) and Bechtel (San Francisco) Geotechnical groups on several engineering projects in the US and around the world

involving the design of foundation systems, slopes, and underground structures and tunnels. Her research team at CU studies: the interactions

and interdependencies among different infrastructure systems during earthquakes and other types of disasters; the seismic performance of

underground structures; and consequences and mitigation of the liquefaction hazard facing structures in isolation and in dense urban settings.

(URL: https://shidehdashti.com)

Shideh DashtiAssociate Professor, Geotechnical Engineering and Geomechanics

Civil, Environmental, and Architectural Engineering

University of Colorado Boulder


Research Institute

Guest Speaker:




“ Cool Projects in the “Real World” “


EEL auditorium

Abstract:

In this seminar, three Miyamoto projects will be discussed: LAX Theme Building,

Santa Clarita City Hall and Van Ness MOB. The LAX Theme Building was a

retrofit using tuned mass dampers to increase seismic resistance, an example of

large-scale dynamics in action. The Santa Clarita City Hall was a retrofit using

fluid viscous dampers to ensure the building remains operational after the design

level earthquake. The Van Ness Medical Office Building design consisted of a 10

story structure above ground, and six levels of below grade parking. The design

incorporated a BRB framed structural system, a green roof, and an underground

tunnel.

Bio: Jeff Crosier, S.E., is Senior Principal at Miyamoto International, Inc., a global earthquake

+ structural engineering firm with 21 offices in 13 countries around the world. Jeff oversees the

domestic operations, teams of structural engineers and has completed more than 3,000

projects in a career spanning 33 years. His aim on a variety of projects in the health care,

education, medical and commercial sectors is to develop innovative structural and seismic

engineering solutions for clients. His experience includes developing detailed program plans,

designing new structures and rehabilitating existing buildings with both conventional and

alternative construction methods.

Jeff Crosier, S.E.

Senior Principal at Miyamoto International


Research Institute

Guest Speaker:


For More Information Contact: Ali Hammad, Student Chapter PresidentDepartment of Civil and Environmental Engineering


Development and application of shape memory alloys for Civil

Engineering structures

Tuesday, April 9th , 2019 12:00 PM

EEL auditorium

Abstract:

Shape memory alloys are identified with several unique phenomena such as the shape memory effect,

superelasticity, large damping capacity or a two-way shape memory effect. The iron-based shape memory

alloy (Fe-SMA) shows high strength, excellent shape recovery stress, a wide transformation temperature

range, high elastic stiffness, low material costs and simple manufacturing process in comparison to NiTi

alloys. The Fe-SMA therefore has a huge potential for structural application in particular in the area of

reinforcement of new structures or strengthening existing concrete structures.

At Empa, an iron-based shape memory alloy (Fe–17Mn–5Si–10Cr–4Ni–1(V,C) (ma.-%)) has been

developed and patented (Dong et al. 2009).

In close collaboration with numerous national and international partners in science and industry, the newly

founded company re-fer AG and Empa have developed a system that enables the reinforcement and repair of

concrete structures. Together they have mastered all technical, economic and social challenges. A feasibility

study on the usage of the developed Fe-SMA for the strengthening of reinforced concrete structures showed

the ability of the developed Fe-SMA for prestressing concrete elements. Several reinforced concrete (RC)

beams were strengthened using the near surface mounted (NSM) reinforcement technique with ribbed Fe-

SMA strips, see below figure. The recovery stress (prestress force) after prestraining to 2.0% or 4.0% and

heating to 160 °C was in the range of 250–300 MPa. Recently, Fe-SMA strip (thicknesses of 1.5 and 0.5

mm) and bars (diameters of 12 and 16 mm) production has been started at an industrial scale, more than 30

tons, by Company re-fer AG, see below figure. A first on-site application of the Fe-SMA strips took place in

May 2017 in Villigen (Switzerland). In this case, the necessity of structural strengthening of a 24-cm-thick

reinforced concrete slab in a carpentry was due to the reconversion of the space beneath, see below figure.

As a result, all those involved have achieved increases in knowledge; Empa was able to continue to build up

its scientific reputation in the relevant subject area. The company has carried out its first reference projects

with the system and its global market entry is imminent and several other real applications are being

planned. The actual market success can only be estimated in the future.

Masoud Motavalli

Head, Structural Engineering Research Laboratory, Empa, Switzerland

2018-2019 annual report · 2018-2019 annual report, july 1st, 2019 ... r/c frame structure with...

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