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为了研究钢桥墩高架桥的抗震性能,本文基于多尺度建模技术,对五跨连续钢桥墩高架桥进行多尺度简化,采用非线性时程分析方法计算获得该高架桥的桥墩水平力时程曲线、整体结构位移曲线、力与位移滞回曲线等分析结果。通过分析该高架桥的模拟结果,探明该高架桥的抗震性能。研究表明:多尺度建模应用到高架桥抗震分析中,能有精确模拟桥墩受力和变形情况,同时有效平衡计算精度和计算时间;在地震波作用下,高架桥的桥墩屈曲破坏,全部进入弹塑性阶段,具有良好的延性性能。
In order to study the seismic performance of viaduct with steel piers, this paper, based on the multi-scale modeling technology, simplifies the multi-span viaduct with five-span continuous steel piers. The time-history curve of the horizontal force of the piers of the viaduct is obtained by nonlinear time history analysis. Displacement curve, force and displacement hysteresis curve analysis results. By analyzing the simulation results of the viaduct, the seismic performance of the viaduct is proved. The results show that the multi-scale modeling is applied to the viaduct seismic analysis, which can accurately simulate the stress and deformation of the piers, meanwhile effectively balance the calculation accuracy and calculation time. Under the action of seismic waves, the buckling failure of the viaduct piers all enters the elasto-plastic phase , With good ductility.