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Study on Vulnerability of Concrete Filled Steel Tube Frame-Buckling-Resistant Bracing Structure System under Wind and Earthquake Coupling

Yongjun Xu

Article ID: 1058
Vol 3, Issue 1, 2019, Article identifier:

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Engineering structures will inevitably be affected by various disasters such as wind or earthquake during their whole service life. Taking the concrete-filled steel tube frame-buckling-restrained brace structure system as the research object, the wind speed time histories at different heights of the structure with recurrence periods of 1 year, 10 years and 50 years are simulated. Based on the OpenSees finite element software, the nonlinear dynamic time history analysis of the structure under four working conditions of earthquake single action and wind-earthquake coupling action with recurrence periods of 1 year, 10 years and 50 years respectively is carried out, and the vulnerability curves of the structure under different working conditions are generated based on the seismic demand analysis method. The results show that with the increase of wind action, the structural response and vulnerability have an increasing trend.  However, with the increase of ground motion intensity, the influence of wind on structural vulnerability gradually decreases.


coupling effect of wind and earthquake; Concrete filled steel tube frame; Buckling prevention support; Non linear dynamic time history analysis: Vulnerability

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