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鉴于曲线桥每个墩柱的最大反应依赖于不同的地震输入角度,运用时程分析工作量大,本文基于Pushover法基本原理,考虑曲线桥墩柱底部曲率与地震动力反应的关系,提出了曲线桥在地震作用下动力响应的最不利角度的简化计算方法.通过具体曲线桥动力反应分析算例,采用非线性静力Pushover分析方法,计算了曲线桥的地震动最不利输入角度;同时结合0～180°区间内的动力时程分析方法结果比较,验证了该方法在确定曲线桥地震反应最不利输入角度方面的适用性.
In view of the fact that the maximum response of each pier in curved bridge depends on different seismic input angles and the time-course analysis workload is large, based on the basic principle of Pushover method and considering the relationship between the curvature at bottom of curve piers and earthquake dynamic response, A simplified calculation method of the most unfavorable angle of dynamic response under earthquake is proposed.According to the example of dynamic response of concrete curve bridge and the nonlinear unfavorable pushover analysis method, the most unfavorable input angle of ground motion of curve bridge is calculated, The results of dynamic time history analysis in 180 ° interval verify the applicability of this method in determining the most unfavorable input angle of seismic response of curved bridge.