j. marneris & associates structural ... · seismic isolation was not unknown to the an-cient...

J. MARNERIS & ASSOCIATES STRUCTURAL CONSULTANTS LTD

ISO 9001:2008 TUV

www.marneris.gr

J. MARNERIS & ASSOCIATES STRUCTURAL CONSULTANTS LTD

www.marneris.gr

4 Perikleous str. N. Psichiko154.51 Athens Greece tel. 0030 210 6721212fax 0030 210 [email protected]

CONTENTS 1. WHO WE ARE 2. WHAT WE DO3. CLIENTS

4. AREAS OF CONCENTRATION A. Buildings & Infrastructure I. Concrete Structures II. Steel Structures III. InfrastructureB. Retrofitting C. Advisory Work

5. CUTTING EDGE TECHNOLOGIESa. Seismic Protection b. The JM & A proprietary PARSANT Retrofit Methodology

6. COMPANY CREDENTIALS

Leading Greek Structural ConsultancyOver the past 25 years JM&A has established itself as one of the leading structural engineering consultancies in Greece. Prominent Greek and international architects, responsible for high-profile and challenging projects, have turned to JM&A for solutions which are both high-quality and cost-effective as well as inventive, practical and above all reliable.

The architect’s preferred ConsultancyJM&A takes a particular pride in providing the architect with a broad range of conventional and inventive solutions to best meet client requirements. Where the contractor calls for modifications to the original design JM&A is there to support the architect in meeting critical time constraints.

WHO WE ARE

J. MARNERIS & ASSOCIATES

An efficient multi-disciplinary delivery teamUnlike some other multi-disciplinary consultancies the quality of overall design is in no way compromised by any insistence on exclusively employing in-house expertise. JM&A will always meet the brief in the most effective manner possible, calling on a roster of outside experts and has indeed established a lengthy and proven track record in such collaboration in order to offer the client a maximised and fully co-ordinated proposal and thus a keen competitive edge.

Cutting edge design JM&A has the in-depth structural engineering expertise to produce the cutting edge design demanded by the architect in combining ge-ometry and materials. Buildings undertaken to date range from hospitals and shopping malls to state of the art retrofits (upgrades), which breathe new life into old hospitals, schools, ho-tels or other buildings, both public and private, where uninterrupted functionality is required.

WHO WE ARE


Advanced seismic designAs the Mediterranean area is seismically active, seismic design is a prerequisite of most JM&A projects. Cost-effective design for both new and existing building retrofits is based on linear / non-linear dynamic analysis. JM&A special-izes in the latest technological developments for seismic isolation (base isolators, tune mass dampers etc) in order to achieve • zero tolerance of cracking on the interior decoration of sensitive structures (theatres, hospitals etc);• uninterrupted functionality of recovery-criti-cal strategic structures such as hospitals.Seismic isolation was not unknown to the an-cient Greeks: the Parthenon was indeed the predecessor of today’s seismically isolated buildings, having a thin layer of sand in its foundations emulating a seismic isolator.

Innovative and cost-effectiverestoration of ageing structuresJM&A has had extensive involvement in retro-fitting (upgrading) existing structures, mainly in order to achieve compliance with today’s demanding seismic codes. This has led to the development of our patent proprietary meth-odology (PARSANT) which was first presented at the 14th World Conference on Earthquake Engineering in Beijing in 2008.This low-cost innovative methodology makes it possible to upgrade a building without inter-rupting activity, thus providing a cost-effective alternative to hitherto unavoidable demolition. This methodology has been incorporated in the stringent Greek Codes of Practice for ret-rofits of existing structures.

OurKeyStrengths• Anethicalcorporatephilosophy• Aclosely-knitteamofhighlyexperiencedstructuraldesigners• FamiliaritywithUSandEuropeanCodes• Designoutputofthehigheststandard,includingexhaustivelydetaileddrawings

• Promptandflexibleresponsetochangingrequirementsemerginginthecourseofaproject

1. SHOPPING MALL: “PIRAEUS HELIOS PLAZA”PIRAEUS 2010A shopping mall with a “gondola” shaped steel structure proposed at the top, supported by inclined steel columns at the perimeter form-ing a “bird’s nest”. Four floors and four un-derground levels comprise a total area of 71.000m2. Precast hollow pre-stressed slabs used extensively.Challenging aspect: Due to poor soil condi-tions and high water level, a “slurry wall” sys-tem was prescribed during the excavation, complemented by a “pile-raft” foundation system.

Architects: CHAPMAN & TAYLOR LTD, London

WHAT WE DO


WHATWE DO


2. OFFICE HEADQUARTERS: “BAYER HELLAS”ATHENS 2002A 4 floor building -with 2 basements serving as a parking lot- comprising a total area of 17.000 m2, in Athens (Maroussi area).Between the two separate parts of the con-crete buildings structure, a light steel structure is erected that is pinned at one side and free to sway at the other.Challenging aspect: provisional anchored piles’ system prescribed during excavations.

ArchitectsK. KYRIAKIDES & ASSOCIATES SA Athens

WHATWE DO


3. INFORMATION TECHNOLOGY & COMMUNICATION COMPLEX: “(ITCC)”RIYADH – SAUDI ARABIA 2012

Seventeen buildings comprising a total gross area of about 420.000m2.Performed Tasks:• Design of all steel structures ( total area of

10.000m2 ) • Checking and correction of concrete struc-

tures (circa 2.500 elements) • Advisory services: preparation of 11 reports

handling construction discrepancies from the original design, and demonstrating full compliance with the US Codes.

Contractor: J&P JOANNOU & PARASKEVAIDES (SAUDI ARABIA) LTD

WHATWE DO


4. SCHOOL: “ARSAKIO” ELEMENTARY SCHOOL IOANINA 2003Classrooms made of reinforced concrete, with multipurpose rooms made of steel and com-posite members: Total area 5.500 m2.Challenging aspect: elaborate details in the steel structures dictated by the elegant ar-chitectural design, and the requirement for a curved steel roof.

ArchitectsDOMOS SA – J. LEONTOPOULOSAthens

WHATWE DO


5. ATHENS METRO: “ST. ANTONIOS” METRO STATION, ATHENS 2003Sustainable design, with a total area of about 33.500 m2 split in three levels. Top slab simul-taneously serving as a highway bridge.Challenging aspect: temporary anchored piled walls going down to a depth of 20 m.

ContractorJ.V. AKTOR SAX.I. KALOGRITSAS SA

CLIENTSPUBLIC SECTOR


GREEK MINISTRIES • Ministry of Aegean • Ministry of Agriculture • Ministry of Culture• Ministry of Defence • Ministry of Health • Ministry of Environment and Public Works • Ministry of External Affairs

EDUCATIONAL INSTITUTIONS• Aegean University • Arsakio (School Foundation) • Athens University• British Council, Athens • Chania Polytechnic • Thrace University

GREEK PUBLIC UTILITY COMPANIES• Athens Metro (Attiko Metro SA)• Public Power Corporation (DEH) • Real Estate Organisation (KED) • Social Security System (IKA)

MUNICIPALITIES• Athens • Chania-Crete • Heraklion-Crete

GREEK MILITARY• General Staff of Greek Air Forces • General Staff of Greek Armed Forces • General Staff of Greek Naval Forces

HOSPITALS• Greek Ministry of Health & The Association for Children with Cancer • Greek Public Hospitals Administration (DEPANOM) • Psychiatric Hospital of Attica

MISCELLANEOUS• Canadian Embassy, Athens • Greek Orthodox Church, Crete

CHANIA POLYTECHNIC


BANKS• Agricultural Bank of Greece • Commercial Bank of Greece• EFG Eurobank SA • Piraeus Industrial Bank SA (VIPETVA)

GREEK / FOREIGN CORPORATES• BAYER Hellas • Helios Plaza Center • Hondos Center SA • Ionia Publications SA • LIDL Hellas • UNILEVER Hellas • WURTH Hellas SA

CLIENTSPRIVATE SECTOR

CONTRACTORS• A. Kapetanides SA • J&P Joannou & Paraskevaides (Saudi Arabia) LTD • J.V. GEK-Terna SA • J.V. JP-Avax SA • Vioter SA

DEVELOPERS• Bitsos Development SA • Ektasis Development SA • Hatsios Estate Development SA • P. I. Zouganelis Development SA

AGRICULTURAL BANK’S ATHENS IT CENTRE

SHIPPING CO OFFICES IN ATHENS


A. Buildings & InfrastructureI. CONCRETE STRUCTURESa. Non-Industrial• Administrative buildings • Air terminals • Banks • Conference halls• Garages • Hospitals • Hotels • Houses• IT centers • Military buildings • Museums • Office buildings • Schools • Shopping centers • Theaters • Universities

b. Industrial• Hydroelectric Stations • Industrial Complexes • Sanitary Facilities • Silos • Tanks & Reservoirs • Warehouses • Workshops

PRECAST STRUCTURES• Architectural façade elements • Hotel Bungalows • Houses • Military Projects • Schools

AREAS OF CONCENTRATION


AREAS OFCONCENTRATION

A. Buildings & InfrastructureI. CONCRETE STRUCTURES


A. Buildings & InfrastructureII. STEEL STRUCTURES• Conference halls • Hangars • Stadiums and Athletic halls • Storage buildings • Theaters



A. Buildings & InfrastructureIII. INFRASTRUCTURES

AREAS OFCONCENTRATION • Anchored piled retaining walls

• Metro stations

• Multi span river-crossing Bridges



• Highway Bridges

• Tunnels “Cut & Cover” Method

A. Buildings & InfrastructureIII. INFRASTRUCTURES


B. Retrofitting

Rather than demolish and rebuild, Retrofitting enables the “replacement” of an ageing struc-ture fast, at a low cost, and with no interruption to its daily functions.The original framing structure may be even strengthened and be able to comply with stricter seismic codes, and higher loading conditions (eg. through addition of floors, or changes of use).

• Administrative buildings • Garages • Hospitals • Houses • Military buildings • Office buildings • Prisons • Schools


Retrofit Work comprises:• Assessmentofexistingstructure• Laboratorytestingtoassessstrengthofexistingstructuralelements

• Repairsoftheloadbearingstructureelements

• Localandoverallstrengtheningofthestructure

• ProjectmanagementandsupervisionservicesareofferedforallPARSANTapplications


Where deemed necessary the patented proprietary PARSANT methodology is utilized:

RETROFITTED BUILDING EMPLOYING THE PARSANT METHODOLOGYDisruption of a building’s function is avoided through the introduction of additional pin connected anti- seismic panels on the outside perimeter of a building.

RENOVATION AND UPGRADING OF A MILITARY HOSPITALIn order to prolong the life of this old hospital (9.600 m2, typical RC frame with masonry walls) a critical issue had to be addressed: the “reduction” of the longitudinal side of the building that was excessively long. To this end two expansion joints were introduced.

Project OwnerGREEK ARMED FORCES (General Staff)

B. Retrofitting


providing advice on “challenging” structural design issuesJM&A’s excellent reputation is the source of a constant flow of Assignments in connection with complex/ challenging non- traditional structural design issues. This ensures that JM&A is kept up-to-date with emerging requirements in the construction industry.

participation in international design competitions for Greek projectsOn numerous occasions, JM&A ‘s co-operation is being sought by Architects & Designersof international acclaim in bidding for important Greek projects.

auditing original structural design & implemented designOwners of major projects– normally JM&A long standing public sector customers - appoint JM&A at times to act as their “auditor” of the submitted Structural Consultant’s design work. Equally, a Contractor may appoint JM&A to confirm that discrepancies between the original and the implemented design, are in compliance with the applicable Code.


CORFU OPERA THEATER TEAM4 – BDP MUENCHEN GMBH

NEW ACROPOLIS MUSEUM VASQUEZ-ALVAREZ & OVE ARUP SA

SALONICA MILITARY HOSPITALARCOPLAN AG, Switzerland

C. Advisory Work

a. Seismic ProtectionSeismic engineering design capability involving Base isolation and Passive Energy dissipation through Dampers/ Tune Mass Dampers (pro-cured from / designed In co-operation with reputable International manufacturers):

BASE ISOLATION OF BUILDINGSRubber bearings installed in a building’s foundations “isolate” the above ground part of the building from any ground movement, thus greatly reducing the magnitude of seismic forces impacting the building. The resulting marginally increased construction cost ( by circa 5%) ensures that damages that may be normally seen in non- structural elements during an earthquake, are entirely avoided irrespective of an earthquake’s magnitude.

CUTTING EDGE TECHNOLOGIES


ANTI-SEISMIC DAMPERS These are passive seismic energy absorbing devices, in-stalled directly into a building’s framing system (Fig. 1), or inserted in the diagonal members of a “PARSANT” panel (Fig. 2, please see section b. that follows). They are sophis-ticated devices - usually of the “fluid viscous” or “friction” type- and may absorb up to 40% of the seismic energy, thus relieving the existing structure by an equal energy amount. The structural analysis of such structures normally employs non-linear methods through the use of specialized Software.

TUNE MASS DAMPERS These are independent oscillators, usually mounted on the top level of buildings. During an earthquake, by swinging in the opposite direction to that of the existing framing structure, Tune Mass Dampers achieve a considerable reduction in seismic forces and deflections.

Fig. 1

Fig. 2

CUTTING EDGETECHNOLOGIES


b. The JM&A proprietary PARSANT Retrofit Methodology*• Subject methodology was awarded a pat-

ent in 2004, and was first presented inter-nationally in the 14th World Conference on Earthquake Engineering in Beijing, China (October 2008). The Methodology has been incorporated in the Greek Codes for Strengthening / Repairing existing buildings since 2008.

• Strong steel panels are placed around a building’s out-side perimeter and are rigidly connected to its existing framing system. Dampers may be incorporated along the diagonal members of the panels for seismic energy ab-sorption purposes.

• PARSANT is low cost, requires short construction time and does not have an impact on a building’s internal daily function.

• Applications of the method include repairs of damaged buildings, renovation of buildings, new floor additions, and possibly increased loading assumptions.

*FOR A DETAILED POWER POINT PRESENTATION OF THE PARSANT PLEASE SEE FOLLOWING LINK: www.marneris.gr/Parsant/PRESENTATION.ppt

The HistoryJ Marneris & Associates (JM &A) was founded 25 years ago by John Marneris, M. Sc. Structural Engineering (1976, Distinction). The founder, in the 10 year preceding period, had acquired significant international ex-perience: first working for the International Consulting firm FRANC BA-SIL INC (both in Athens and in Saudi Arabia), and subsequently for the highly respected Greek Consulting firm AMTE SA of Professor S. Angeli-dis (Athens).

The TeamJM & A’s long serving and closely knit team of Qualified Structural engi-neers have a combined working experience of over 130 years (of which over 100 years within JM & A), and are supported by 3 Assistant Struc-tural engineers/ Draughts men.

ORGANIZATION CHART

COMPANY CREDENTIALS


COMPANYCREDENTIALS


The Design Work completed to dateStructural Designs for over 200 building / infrastructure projects (for both the Private and the Public Sector) comprising enclosed space of over 800,000 sq m. have been completed todate. (A comprehensive Project Inventory is available upon request).

The SoftwareSpecialist engineering Software comprises well documented and tested computer programs such as AUTOCAD, STAAD-PRO, SOFISTIK, ETABS, as well as in-house developed programs to cater for the various Design Codes.

JM & A is: ISO 9001:2008 (TUV Nord Group) certified Structural Engineering Consultancy

licensed for - Highest Complexity Projects in Greece (Registered Grade E Company)- NATO Projects (Registered with the Greek Ministry of Defense)

fully conversant with American and European Design Codes.

fully operational in Greek, English, and French

j. marneris & associates structural ... · seismic isolation was not unknown to the an-cient...

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