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为进一步认识矮塔斜拉桥地震动力响应特性,以大连长山矮塔斜拉桥为具体工程背景,采用ADINA三维实体单元模拟桥梁结构与桩基,全面考虑预应力钢筋作用和桩土相互作用影响,通过建立全桥大规模三维动力分析数值模型,针对桥梁结构-桩基-地基相互作用体系分别进行了地震反应谱分析、弹性和弹塑性动力时程分析,并对桥梁结构体系抗震性能进行了系统评价,计算结果表明:桥梁体系关键控制截面抗震强度和变形均满足规范要求,主墩位置易发生较大塑性变形;对矮塔斜拉桥等特殊桥梁进行抗震设计时,宜进行考虑主墩结构弹塑性影响的控制截面变形校核。
In order to further understand the seismic response characteristics of the low pylon cable-stayed bridge, taking the Dalian Changshan dynasty cable-stayed bridge as a specific engineering background, ADINA three-dimensional solid element is used to simulate the bridge structure and pile foundation. The interaction between prestressed reinforcement and pile-soil interaction , The seismic response spectrum analysis, elastic and elasto-plastic dynamic time history analysis of the bridge structure-pile-foundation interaction system were carried out by establishing the numerical model of large-scale three-dimensional dynamic analysis of the bridge. The seismic performance of the bridge structure system The results of the calculation show that the seismic strength and deformation of the key control cross-section of the bridge system meet the requirements of the code, and the plastic deformation of the main pier is likely to occur. For the special design of a short bridge cable-stayed bridge for seismic design, Deformation Control of Cross Section for Elastoplastic Influence of Pier Structure.