DOI: 10.3724/SP.J.1249.2016.05476

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2016/33:5 PP.476-483

Piecewise linear fitting of softening static pushover curves

Because the traditional bilinear fitting method is difficult to fit softening static pushover curves, we propose the trilinear piecewise linear fitting method to fit such curves based on equal energy rules. The processes are provided step by step. Taking two reinforced concrete frame structures as examples, we fit softening static pushover curves of the cases with both bilinear and trilinear fitting methods, and compare the results of the two methods with the results computed by nonlinear dynamic time history method respectively. Research indicates that the proposed trilinear fitting method is more accurate than the traditional bilinear method for structures whose pushover curves have descending branch.

Key words:structural engineering,pushover analysis,pushover curves,bilinear fitting method,trilinear fitting method,nonlinear dynamic time history analysis

ReleaseDate:2016-09-27 14:21:23

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