Contemporary Seismic Engineering 2010

154 Pages·2010·8.22 MB·English

Proceedings of the
COMMERCE AND ECONOMIC DEVELOPMENT BUREAU
THE GOVERNMENT OF THE HONG KONG
One-day Symposium SPECIAL ADMINISTRATIVE REGION

Contemporary Seismic Engineering 2010

Organized by
Joint Structural Division, The Hong Kong Institution of Engineers
Sponsored by
Department of Civil and Structural Engineering, The Hong Kong Polytechnic University
The Hong Kong Institute of Steel Construction

Funded by
Professional Development Programme in Seismic Engineering for Structural Engineers

27 August 2010
Funding Organization:

COMMERCE AND ECONOMIC
DEVELOPMENT BUREAU

THE GOVERNMENT OF
THE HONG KONG SPECIAL
ADMINISTRATIVE REGION

"Any opinions, findings, conclusions or recommendations

expressed in this material / any event organized under this
Project do not reflect the views of the Government of the Hong

Kong Special Administrative Region or the Vetting Committee
for the Professional Services Development Assistance Scheme."

One-day Symposium
Funded by Professional Development Programme in Seismic Engineering for Structural Engineers
Contemporary Seismic Engineering 2010

Organized by
Joint Structural Division, The Hong Kong Institution of Engineers

Sponsored by
Department of Civil and Structural Engineering,
The Hong Kong Polytechnic University and
The Hong Kong Institute of Steel Construction
Disclaimer

No responsibility is assumed for any injury and/or damage to persons or property as a matter
of products liability, negligence or otherwise, or from any use or operation of any methods,
products, instructions or ideas contained in the material herein. The Institute of Steel
Construction, the authors and the reviewers assume no responsibility for any errors in or
misinterpretations of such data and/or information or any loss or damage arising from or
related to their use.

Copyright © 2010 reserved by The Hong Kong Institute of Steel Construction

All rights reserved. No part of this publication may be produced, stored in a retrieval system,
or transmitted in any form or by any means, electronic, mechanical, photocopying, recording
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the right to republish their contributions consisting solely of their own work.

Printed in Hong Kong

ISBN: 978-988-99140-8-0

The Hong Kong Institute of Steel Construction
www.hkisc.org
Preface 

Traditionally and currently, seismic design is not required in building structures in Hong Kong 
and inertia loads due to seismic motion are not needed for consideration in local structural 
design  codes.  After  various  earthquakes  in  China  and  other  places,  the  public  and 
professional in Hong Kong begin to reconsider whether or not there is a need of considering 
earthquake scenarios in Hong Kong. The Mainland Chinese seismic design code GB50011‐
2001for seismic design includes Hong Kong in the seismic fortification intensity of 7 degree 
which implies a basic ground acceleration equal to 0.15 g. This indicates another justification 
for consideration of seismic loads in design of structures in Hong Kong. In addition to the 
local possible need of considering seismic loads for construction in Hong Kong, its engineers 
regularly work in the Mainland and overseas such as those countries in the Middle East, 
Southeast Asia and Macau. Many of these places require a different degree of seismic 
consideration in the framing plan and in the member and element design. While the local 
practice does not have this consideration, local engineers may not be so familiar with its 
design and thus they are at a disadvantageous position when competing with engineers from 
other countries in tender or project bidding and in design stages. This seminar is aimed to 
remedy the above shortfalls with an aim to improve Hong Kong engineers’ competence in 
design of structures in Hong Kong and other places. 

The  editors  would  like  to  take  this  opportunity  to  express  their  sincere  thanks  to  the 
sponsoring organisations namely as Commerce and Economic Development Bureau of the 
Government of Hong Kong SAR Government, The Hong Kong Polytechnic University and the 
Joint Structural Division of the Hong Kong Institution of Engineers for their efforts and 
supports in making this seminar a reality. They would also like to thank you the speakers of 
this seminar in sharing their expertise with us. 

SL Chan    ST Chan      CK Lau      Aldows Tang 

27th August 2010, Hong Kong, China 

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Contemporary Seismic Engineering 2010 

Time  Program  Session 
Chairmen 
08:45 am                                                          Registration 
09:05 am  Welcoming Speech   
Ir C.K. Lau, Immediate Past Chairman of JSD, HKIE   Ir Dr. Andy Lee 
Chairman of Structural Discipline Advisory Panel and Head of 
Structural Section, Sun Hung Kai Properties Limited 
09:15 am  Opening Speech  
Ir Prof. KK Choy, Vice‐President, The Hong Kong Institution of 
Engineers 
Lecture 1  "Revision of seismic design codes corresponding to building   
09:30 am  damages in the “ 5.12” Wenchuan Earthquake   Ir Adam Choy 
Prof. Y.Y. Wang,  Main editor of the National Code for Seismic 
Design of Buildings GB50011‐2008, Mainland China 
Lecture 2  Application of Buckling‐Restrained Braces in Steel Frameworks 
10:00 am  against Earthquakes. 
Prof. G.Q. Li , Professor, Tongji University, Shanghai 
Lecture 3  Scaling the ground motion accelerations for response history 
10:30 am  analysis of tall buildings 
Prof. KC Tsai, National Taiwan University, Taiwan 
11:00 am                                                          Tea Break 
Lecture 4  Progress of Seismic Design for Steel Structures in China   
11:30 am  Mainland  Ir Ken Ng 
Prof. GP Shu and Dr. S Sun, Southeast University, Nanjing  
Lecture 5  Design of Plate‐reinforced Composite Coupling Beams in Tall 
12:00 noon  Buildings 
Dr. Ray Su, University of Hong Kong, HK 
12:30 pm                                                           Lunch 
Lecture 6  Performance Based Seismic Design for Contemporary   
14:15 pm  ArchiStructures  Ir Dr. Y.L. Wong 
Dr. Goman Ho, Ove Arup and Partners Limited   
Lecture 7  Seismic Risk Analysis 
14:45 pm  Prof. TT Soong, State University of New York at Buffalo, USA 
Lecture 8  Seismic mitigation of mid‐rise buildings by new earthquake 
15:15 pm  resistant system using base isolation and story isolators 
Ir Dr.S.S. Lam, Hong Kong Polytechnic University, Hong Kong 
15:45 pm                                                           Tea Break 
Lecture 9  Spectrum and time history analysis of building structures by   
16:15 pm  software NIDA  Ir Dr. SW Yuen 
Dr. Y.P. Liu  & Prof. S.L. Chan, Hong Kong Polytechnic 
University, HK 
Lecture 10  Closing remarks 
16:45 pm  Ir S.T. Chan, Assistant Director, Housing Department, HK SAR 
Government 
17:00 pm  End 

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CONTENTS 
  Page no. 

Preface  i 

Programme  ii 

Contents  iii 

Revision of seismic design codes corresponding to building damages  1 
in the “ 5.12” Wenchuan Earthquake 
Prof. Y.Y. Wang, Main editor of the National Code for  
Seismic Design of Buildings GB50011‐2008, Mainland China 

Application of Buckling‐Restrained Braces in Steel Frameworks  19 
against Earthquakes 
Prof. G.Q. Li , Professor, Tongji University, Shanghai, Mainland China 

Scaling the ground motion accelerations for response history analysis  35 
of tall buildings  
Prof. K.C. Tsai, National Taiwan University, Taiwan 

Progress of Seismic Design for Steel Structures in China Mainland  55 
Prof. G.P. Shu, Southeast University, Nanjing, Mainland China 

Design of Plate‐reinforced Composite Coupling Beams in Tall Buildings  63 
Dr. Ray Su, University of Hong Kong, Hong Kong 

Performance Based Seismic Design for Contemporary ArchiStructures  83 
Dr. Goman Ho, Ove Arup and Partners Limited, Hong Kong 

Seismic Risk Analysis  91 
Prof. T.T. Soong and I.-S. Ahn, State University of New York at Buffalo, USA 

Seismic mitigation of mid‐rise buildings by new earthquake resistant system  105 
using base isolation and story isolators 
Ir Dr.S.S. Lam and Z.D. Yang, Hong Kong Polytechnic University, Hong Kong 

Spectrum and time history analysis of building structures by software NIDA  123 
Dr. Y.P. Liu and Prof. S.L. Chan, Hong Kong Polytechnic University, Hong Kong 

iii

Contemporary Seismic Engineering 2010, Hong Kong 27 August 2010

REVISION OF SEISMIC DESIGN CODES CORRESPONDING
TO BUILDING DAMAGES IN THE “5.12” WENCHUAN
EARTHQUAKE

Wang Yayong
Institute of Earthquake Engineering, China Academy of Building Research
Beijing 100013, China

[email protected]

ABSTRACT

A large number of buildings were seriously damaged or collapsed in the “5.12” Wenchuan
earthquake. Based on field surveys and studies of damage to different types of buildings,
seismic design codes have been updated. This paper briefly summarizes some of the major
revisions that have been incorporated into the “Standard for classification of seismic
protection of building constructions GB50223-2008” and “Code for Seismic Design of
Buildings GB50011-2001.” The definition of seismic fortification class for buildings has
been revisited, and as a result, the seismic classifications for schools, hospitals and other
buildings that hold large populations such as evacuation shelters and information centers
have been upgraded in the GB50223-2008 Code. The main aspects of the revised GB50011-
2001 code include: (a) modification of the seismic intensity specified for the Provinces of
Sichuan, Shanxi and Gansu; (b) basic conceptual design for retaining walls and building
foundations in mountainous areas; (c) regularity of building configuration; (d) integration of
masonry structures and pre-cast RC floors; (e) requirements for calculating and detailing stair
shafts; and (f) limiting the use of single-bay RC frame structures. Some significant examples
of damage in the epicenter areas are provided as a reference in the discussion on the
consequences of collapse, the importance of duplicate structural systems, and the integration
of RC and masonry structures.

Keywords: Wenchuan Earthquake; Earthquake Damage to Buildings; Revision of Seismic
Design Codes

Supported by: National Natural Science Foundation of China Under Grant No. 50439010;
NSFC and Korea Science and Engineering Foundation Under Grant No. 50811140341
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