Effect of bidirectional excitation on seismic performance of regular RC frame buildings designed for modern codes

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Gwalani, P (Author) Other; Singh, Y (Author) Other; Humberto Varum (Author) FEUP

Journal

Title: Earthquake Spectra

Vol. 38

Pages: 950-980

ISSN: 8755-2930

Publisher: Earthquake Engineering Research Institute

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00V-P4S

DOI: 10.1177/87552930211047879

Abstract (EN): The existing practice to estimate seismic performance of a regular building is to carry out nonlinear time history analysis using two-dimensional models subjected to unidirectional excitations, even though the multiple components of ground motion can affect the seismic response, significantly. During seismic shaking, columns are invariably subjected to bending in two orthogonal vertical planes, which leads to a complex interaction of axial force with the biaxial bending moments. This article compares the seismic performance of regular and symmetric RC moment frame buildings for unidirectional and bidirectional ground motions. The buildings are designed and detailed according to the Indian codes, which are at par with the other modern seismic codes. A fiber-hinge model, duly calibrated with the biaxial experimental results, is utilized to simulate the inelastic behavior of columns under bidirectional bending. A comparison of the estimated seismic collapse capacity is presented, illustrating the importance of considering the bidirectional effects. The results from fragility analysis indicate that the failure probabilities of buildings under the bidirectional excitation are significantly higher as compared to those obtained under the unidirectional excitation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 31