Seismic response analysis of buildings in malaysia subjected to near-field and far-field ground motions
Loading...
Date
2018-06
Authors
Tan, Chin Guan
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Despite experienced earthquakes from local origin, tremors from neighbouring
active seismic countries are felt in Peninsular Malaysia. The buildings subjected to local
and distant earthquakes are posed with different damage potentials due to local site
condition. This dissertation presents the effect of soil amplification for sediments with
different soil classes and the structural responses of buildings with different heights
subjected to near-field and far-field ground motions. Class C and E soil profiles
determined from field measurement were considered to estimate the ground surface
motions based on seven near-field and seven far-field bedrock motions recorded at
different seismic stations in Peninsular Malaysia during various earthquake events.
Structural responses of reinforced concrete moment-resisting frame buildings with
varying heights on Class C and E sites subjected to near-field and far-field ground
motions were analyzed using ETABS software. The results show that near-field bedrock
motions have short period contents while far-field bedrock motions have long period
contents. The calculated soil amplification factors show that the maximum acceleration
and amplification factor for Class C and E sites subjected to far-field ground motions are
higher than that subjected to near-field ground motions. From the developed acceleration
response spectra, maximum spectral acceleration developed from both near-field and farfield ground motions on Class C site is higher than that on Class E site. The results with
structural response of base reaction, storey deflection and inter-storey drift of buildings
show that three-storey building that subjected to near-field ground motions give larger
responses, whereas eight and 15-storey buildings on Class C and E sites that subjected
to far-field ground motion result in higher responses. Generally, Malaysia National
Annex gives higher prediction on the response of most of the buildings on Class C and
E sites that subjected to both near-field and far-field ground motions.