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在带剪切连梁的双柱式桥墩拟静力试验研究基础上,该文建立了带剪切连梁的双柱式桥墩的集中塑性铰和纤维单元分析方法并进行了抗震性能分析,比较分析了各模型的墩柱剪力-位移滞回曲线及其骨架曲线与耗能能力、剪切连梁滞回曲线及其耗能能力等性能参数。结果表明:采用集中塑性铰和纤维单元分析方法预测的抗震性能与试验结果吻合较好,且两种分析方法能合理反映桥墩最大荷载后的强度下降、刚度退化和耗能水平下降等现象,表明该方法是分析带剪切连梁的双柱式桥墩抗震性能的有效可靠方法。
Based on the quasi-static test of double-column piers with shearing beams, the method of analyzing the plastic hinge and the fiber unit of double column piers with shear beams is established and the seismic performance is compared. The shear-displacement hysteresis curves, the skeleton curves and energy dissipation capacity, the hysteretic curves of shear beams and their energy dissipation capacity were analyzed. The results show that the seismic performance predicted by centralized plastic hinge and fiber unit analysis method is in good agreement with the experimental results, and the two analytical methods can reasonably reflect the decrease of strength, stiffness degradation and energy dissipation after the maximum load of piers, The method is an effective and reliable method to analyze the seismic behavior of double column pier with shear beam.