Multi-hazard performance assessment of a transfer-plate high-rise building
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Xiangming Zhou1
and Y L Xu (ÐìÓ×÷ë)2
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1. Department of Civil Engineering, School of Engineering, University of
Greenwich at Medway, United Kingdom
2. Department of Civil and Structural Engineering, The Hong Kong Polytechnic
University, Hong Kong, China
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Abstract: Many urban areas
are located in regions of moderate seismicity and are subjected to strong wind.
Buildings in these regions are often designed without seismic provisions. As a
result, in the event of an earthquake, the potential for damage and loss of
lives may not be known. In this paper, the performance of a typical high-rise
building with a thick transfer plate (TP), which is one type of building
structure commonly found in Hong Kong, is assessed against both earthquake and
wind hazards. Seismic- and wind-resistant performance objectives are first
reviewed based on relevant codes and design guidelines for high-rise buildings.
After a brief introduction of wind-resistant design of the building, various
methodologies, including equivalent static load analysis (ESLA), response
spectrum analysis (RSA), pushover analysis (POA), linear and nonlinear
time-history analysis (LTHA and NTHA), are employed to assess the seismic
performance of the building when subjected to frequent earthquakes, design based
earthquakes and maximum credible earthquakes. The effects of design wind and
seismic action with a common 50-year return period are also compared. The
results indicate that most performance objectives can be satisfied by the
building, but there are some objectives, such as inter-story drift ratio, that
cannot be achieved when subjected to the frequent earthquakes. It is concluded
that in addition to wind, seismic action may need to be explicitly considered in
the design of buildings in regions of moderate seismicity.
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Keywords:multi-hazard;
performance-based design; seismic; moderate seismicity; wind; pushover analysis;
transfer-plate; high-rise building
