Prediction sesimic performance of low-rise SMRF with varying number of bays using nonlinear procedures Daniel rumbi teruna (1), Joshua kenny (2)
1Associate Professor, University of Sumatera Utara, Jl. Dr. T. Mansyur No. 9, Medan, Indonesia
2Undergraduate Student, Bandung Institute of Technology, Jl. Ganesha No. 10, Bandung, Indonesia
Abstract
Abstract. This paper presents the seismic performance of three-story reinforced concrete (RC) structures under four selected ground motions. To account for the effect of sequential yielding of hinge regions on seismic performance, different number of bays are considered, from a 1-bay system to a 5-bay system. All structural models are designed as special moment resisting frame (SMRF) according to the Indonesian building code. The four ground motions are scaled with spectral matching method in frequency domain, i.e., Elcentro, Sylmar, Northridge, and Tabas to be compatible with the design response spectrum of the Indonesian seismic code. First, a nonlinear static procedure (NSP) is performed according to the coefficient displacement method of ASCE 41-17 to determine yield strength and maximum roof displacement of the structural models. Then, a nonlinear response history analysis (NTHA) is carried out by using Newmark’s integration method to obtain interstory drifts and hysteretic energy demand. Rayleigh damping is then constructed using a damping ratio of 0.05 for the first and second mode. Furthermore, Park and Ang’s damage index is evaluated for all structural models. Based on the interstory drift, damage index, and performance point, the seismic performance of the structural models is evaluated and compared.
