Building performance with different bedrock response spectrum

Abstract

Response spectrum is a very useful tool in earthquake engineering for estimating the performance of structures. In this research, attenuation equation will be used to find the spectral acceleration of bedrock to predict reliable and more accurate ground motions as far 600 km from potential earthquake sources. According to historical records, the earthquakes that influenced Peninsular Malaysia are originated from two earthquake faults: the Sumatra subduction zone and Sumatra great fault zone. The worst earthquake ever occurred in Sumatra subduction zone is identified as Mw = 9.11 and Mw = 7.81 for Sumatra fault zone. These data were then used to predict the spectral acceleration of bedrock in Malaysia using Probabilistic Seismic Hazard Analysis (PSHA). The maximum response spectrum of bedrock from Sumatra subduction zone for megathrust is 67 gals, benioff is 60 gals and fault zone is 90 gals for site location in Kuala Lumpur while for Pulau Pinang the values of response spectrum from Sumatra subduction zone for megathrust is 57.5 gals, benioff is 47.78 gals and fault zone is 58.33 gals. Performance of building shows that the values of moment for combination load 2 increases about 15.07 percents for column 1 and approximately 4.70 percents for beam 2. Based on the results the performances of building during earthquake loadings are larger than without earthquake loading.