A new pushover procedure for two-way asymmetric-plan tall buildings under bidirectional earthquakes

作者：Khoshnoudian F; Kiani M^*; Yang T Y

来源：Structural Design of Tall and Special Buildings, 2014, 23(14): 1097-1117.

DOI：10.1002/tal.1110

• pushover analysis
• modified consecutive modal pushover (MCMP)
• two way asymmetric plan tall buildings
• torsion
• higher mode effects
• two components of earthquakes

Conventional pushover analyses despite of extensive applications are unable to estimate the general responses of asymmetric-plan tall buildings because of ignoring the effects of higher modes and torsion. A consecutive modal pushover procedure is one of the recent nonlinear static pushover procedures that used to analyse the seismic response of one-way asymmetric-plan tall buildings under one-directional seismic ground motions. In this paper, a modified consecutive modal pushover procedure (MCMP) has been proposed to estimate the seismic demands of two-way asymmetric-plan tall buildings under two horizontal components of earthquakes simultaneously. The accuracy of the MCMP procedure is evaluated using different buildings and comparing with the results of FEMA(Federal Emergency Management Agency) procedures, the practical modal pushover procedure and nonlinear time history analyses as an exact solution. The results show the proposed MCMP procedure is able to estimate the displacements and storey drifts accurately and introduces a great improvement in predicting the plastic hinge rotations.

• 出版日期2014-10-10