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本文通过桥梁结构的动态极限位移分析,建立了在变形能力极限状态下,以动态极限位移为判据的桥梁体系首超失效机制。据此,可在滞回面积和失效概率等效的条件下,用库仑线性模型代替非线性恢复力的双线性模型分析桥梁结构变形能力抗震可靠度,从而克服了概率运算上的一些困难,进一步提高了桥梁抗震动力可靠度分析方法的实用性。
Based on the analysis of the dynamic limit displacement of the bridge structure, this paper establishes the first super-failure mechanism of the bridge system based on the dynamic limit displacement criterion under the limit state of deformation capacity. Therefore, under the condition that the hysteresis area and the failure probability are equivalent, the Coulomb linear model can be used to replace the bilinear model of the nonlinear restoring force to analyze the seismic reliability of the deformation capacity of the bridge structure, thereby overcoming some difficulties in the probability calculation. It further improves the practicality of the reliability analysis method for the anti-shock force of the bridge.