STM Journals Peer-reviewed research from Consortium e-Learning Network

Journal of Offshore Structure and Technology

Analytically and Numerically Predicting Base Shear Coefficient of Building Structure with the Variations of Response Reduction Factor based on BNBC 2020 by using ETABS

  1. Md. Foisal Haque

Abstract

Response reduction factor (RRF) influences the building base shear. Soil profile and seismiczone factors affect the variations of RRF. According to Bangladesh National Building Code(BNBC 2020), three (ordinary, intermediate, and special) different values of RRF for themoment-resisting frame are used for four seismic zones. In the present research, analytical(BNBC 2020) and numerical (ETABS) base shear coefficient ratio (BSC) are evaluated bythe variations of RRF (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12) and seismic zoning factors (Z 1 =0.12, Z 2 = 0.20, Z 3 = 0.28 and Z 4 = 0.36). BSC values are very close for analytical andnumerical analysis. The maximum value of analytical and numerical base shear coefficientratio (BSCR) is 100.29 percent for seismic zone – 1 (RRF = 7). Similarly, the minimum valueof BSCR is 99.97 percent for seismic zone -1 (RRF = 10). For all values of RRF and seismiczone factors, numerical BSC is lower than analytical BSC except the location of minimumBSCR.KEYWORDS: Base shear coefficient, Response reduction factor, Analytical formulae,BNBC 2020, Numerical analysis.
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