civl7008 seismic analysis for building structuresdinochen.com/attachments/month_1602/lec1.pdf ·...

CIVL7008 Seismic Analysis forBuilding Structures

Lec-01 Introduction of Dynamics and Seismic



Who am I ?

Dr. Dino Chen,

Email: dinochenxuewei@ yahoo.com.hk

Website: dinochen.com

Associate(Structural)WSP|PB Hong Kong Ltd.

Guest Lecturer (Seismic)Univ. of Hong Kong

PhD. South China Univ. of Tech.


What is Seismic?

Design the structure to resist earthquakeSeismic Design

Estimate the structure safety against to earthquakeSeismic Analysis


Course Content

Lec 01 Introduction of seismic and dynamics

Lec 02 Free/Harmonic Vibration of SDOF

Lec 03 Force Vibration of SDOF

Lec 04 Modal Analysis of MDOF

Lec 05 Vibration Calculation of MDOF

Lec 06 Response Spectrum Analysis Method

Lec 07 Seismic Analysis for Building (Prof Su)

Lec 08 Seismic Design for Building Stru. (Dino)

Lec 09 Seismic Analysis for Building (Prof Su)

Lec 10 Seismic Nonlinear analysis method

Lec 11 introduction of seismic software

Lec 12 Explanation of Assignment

SDOF SYSTEM

MDOF SYSTEM

DESIGN / ANALYSIS

Assignment 1

Assignment 2

Assignment 3


Learning ResourceRay Clough, Dynamics of Structures.

Roy R. Craig. Jr. Structural Dynamics

Frankling Y Cheng, Matrix Analysis of Structural Dynamics

M. Daniel Vanderbit, Matrix Structural Analysis

Paulay T and Priestley MJN. Seismic Design of Rein. Conc. and Masonry Buildings

Jack Moehle. Seismic Design of Rein. Conc. Buildings


[1]Earthquake In Japan M 5.1


Earthquake and building collapse

[2] Building Collapse


Shaking Table Test

[3] [4]E-Defense 6 Story Shake Table.mp4


Dynamics and Static

Static and Dynamic

Static LoadStructural

System Static Response

Displacement

Deflection

Internal Force

Strain and StressStiffness, KMagnitudeDirectionLocation

Dynamic Load

MagnitudeDirectionLocation

DynamicStructural

System

Stiffness, KMass, M

Damping, C

Dynamic Response

Displacement

Velocity

Acceleration

Internal Force, N, M

Stress and Strain,

SDOF System

u

F

disp

K

SDOF System

u

F(t)

dispK

MC

Z

X

100kN

u


Dynamic Loading

Typical Dynamic Load For Structures

P(t)

time

Harmonic Loading

Blast Loading

Bomb Blast Time

P(t)

a(t)

time

Ground Acceleration

Earthquake Center

Earthquake “Load”

Wind Force P(t)

time

Wind force time-history

Wind Vibration

P(t)

time

Unbalanced Rotating Machine in building

Human-induced VibrationHigh-rise building

K


Dynamic Loading

[5] Human induced vibration [6] wind induced vibration

P(t)

Human-induced Vibration

Wind Force P(t)

timeWind force time-history

Wind Vibration

High-rise building

Harmonic Loading


Dynamic, Concept and Terms

Building Structure MDOF System

How to simulate dynamic system

Continuous system

Multiple degree of freedom MDOF

mass

Pin support Pin support

ux

uz

RY

m1 m2 m3 m4

MDOF system Finite element Model System

m4

m3

m2m1

Dynamic System

structure mass damper

a(t)

timeGround

Acceleration

P(t)

Dynamic Loading


SDOF system

SDOF System

u

F(t)

dispK

MC

Stiffness, KDamping, C

Mass, MStructureProperties

Dynamic Loading P(t)

K: Stiffness Spring Force, Elastic Resistance to displacement

M: Mass, Inertia Force

C: Damping, Energy Loss Mechanism

Undamped system

u

F(t)

dispK

M

Damped System

u

F(t)

dispK

MC

u(t)

time

u(t)

time

m

m


Basic: Equation of Motion

[7]SDOF Resonance Vibration Test

SDOF System

u

F(t)

dispK

MC

Dynamic System

Damped System

u

F(t)

disp

K

M

C

Fs

Fd Fi

Fp

Equation of Motion

Fp=P(t) = Fi + Fd + Fs


Feature of this course

Blackboard Writing(easy understand)

Calculation Example (hand Calculation)

Interesting Animation

Learning Programing (how to make program)

Learning Engineer’s Software

(ETABS/SAP2000/OPENSEES)

the examination

Assignment (3 Assignments)

Engineer’s Experience(introduction)

Free Discussion (10~20 min)


Seismic Design: Super high-rise building based on Chinese Code

380m SZ Gangxia Center Tower (Seismic Structural System)


Seismic Design: Super high-rise building based on Chinese Code

High-rise building modal analysis, mode shape

Mode 1 Mode 2 Mode 3


Seismic Design: Super high-rise building based on Chinese CodeGround motion and story drift curve under frequent earthquake “load”

GM1

GM2

GM3

Spectrum

Story Drift (Response) of Structure under earthquake “Load”

Story Drift in X Direction Story Drift in Y Direction


Dynamic: wind time-history AnalysisProgram Make Wind Time History Wind tunnel monitor point map


Dynamic: wind time-history Analysis

Time History Data from wind tunnel (Story Force) Time History Data from wind tunnel


Viscous Dampers are used to control the earthquake vibration, protect the people and medical facilities.

Seismic Design: Structural Damper Study


Seismic Design: Structural Damper Study


Connected Structure Seismic Design

Mega Gate Structure



Mega Gate Structure, Construction of long span truss



Shake Table Model Test


Wind Tunnel Test For Connected Tower

Wind induced vibration checking


Nonlinear Analysis (Blind Analysis Contest)


Nonlinear Analysis (Blind Analysis Contest)

E-Defense (shake table test) Full Scale 4 Story Steel Frame

Modal Analysis and mode shape


Modal Analysis and mode shape


Interesting video of Mode Shape


Open Source Program


SDOF Free Vibration SDOF Harmonic Vibration

SDOF Duhamel Integration

Modal Analysis (MDOF)

Open Source Program


Computation Program (ETABS / SAP2000)

Build Finite Element Model

Static Analysis

Modal Analysis

Spectrum Analysis

Time History Analysis

ETABS


Seismic Tech for Super High Rise Building

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