SEISMIC ASSESSMENT OF LOW-RISE BUILDING WITH TRANSFER STRUCTURE

摘要

An overview of the structural performance of a transfer structure in Hong Kong under potential seismic actions is presented. A hypothetical but realistic low-rise building model has been developed with 7 storey reinforced concrete frame structure and reinforced concrete transfer beams at first floor. Structural design has been based on the British Standard BS8110 and local practices. Parametric analyses of the moment-curvature relationship of each component have been conducted. By adopting the displacement-based (DB) approach, various seismic assessment methodologies, including response spectrum analysis (RSA), manual calculation and pushover analysis (POA) have been carried out. The deformations induced by the predicted seismic actions in Hong Kong are compared with those arising from POA in terms of average lateral drift ratios and maximum inter-storey drift ratios of the building. Factors influencing the performance of transfer structures are highlighted and discussed. This paper also provides a general indication of seismic vulnerability of common low-rise transfer structures in regions of low to moderate seismicity.