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本文以海南铺前独塔斜拉桥为工程背景,建立了该桥的三维有限元动力计算模型,首先介绍了有限元模型的建立和地震动的选取,其次讨论了弹塑性钢阻尼器不同的设计参数(屈前刚度、屈服荷载)对独塔斜拉桥横桥向地震响应的影响,最后对比分析了横桥向墩梁间固结、滑动和弹塑性约束3种不同体系下的桥梁抗震响应,结果表明设置弹塑性钢阻尼器的弹塑性约束体系不仅能够减小全桥结构的地震内力响应,还能控制位移响应在合理范围内。
In this paper, the single pylon cable-stayed bridge in front of the shop in Hainan is taken as the engineering background, the three-dimensional finite element dynamic calculation model of the bridge is established. Firstly, the establishment of finite element model and the selection of ground motion are introduced. Secondly, different elastic-plastic steel dampers The influence of design parameters (flexural rigidity and yielding load) on the seismic response of single tower cable-stayed bridge under transverse load is analyzed. Finally, the seismic behavior of the bridge under three different types of constraints including the consolidation, sliding and elasto-plastic constraints The results show that the elasto-plastic restraint system with elastic-plastic steel damper can not only reduce the seismic internal force response of the full-bridge structure, but also control the displacement response within a reasonable range.