Influence of Structural Systems on Seismic Response Coefficient of the Lower than 23 Meter Buildings in Thailand

Abstract

This research had the objectives to inspect the suitable structural systems and to find the seismic base shear of the buildings lower than 23 meters in each area in Thailand. The method used in this research was static method issued by Department of Public Works and Town & Country Planning (DPT 1302): The Equivalent Static Force Method. The building type was general building with normal importance class. After that, the software DON_V1 was used to analyze for finding the seismic response coefficient (CS ) and the seismic base shear (V ) of all 7 structure systems specified in DTP 1302 of the country data. Then the calculated seismic response coefficient of each system were compared, making the designer be able to choose the well-suitable structure in each area of Thailand. The research result found important data, i.e. at the Mae Chan District, Chiangrai Province, the ductile/special reinforced concrete moment resisting frame CS was 0.087 whereas the ordinary reinforced concrete moment resisting frame could not be used in the design. Moreover, CS of the ductile/reinforced concrete moment resisting frame, in the same building type but in the other areas, were many times different, such as in Phu Pha Man District, Khon Kaen Province, the CS of the ductile/reinforced concrete moment resisting frame was equal to 0.108, less than in Mae Chan District, Chiangrai Province, 4.8 times.