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对曲线部分斜拉桥进行分析,并与直线部分斜拉桥进行对比,总结了曲线部分斜拉桥的静、动力特性。静力方面,对曲线部分斜拉桥进行了几何非线性分析,并与直线部分斜拉桥进行对比,得到曲线部分斜拉桥的几何非线性对横向内力和位移的影响较大,通过做非线性分析都会显著增加,非线性分析,对横向效应的影响不容忽视。动力方面,通过变化曲率半径和改变结构体系分析结构的自振特性。曲线部分斜拉桥参与振动方向比直线部分斜拉桥要多一个甚至几个,曲线部分斜拉桥对抗风分析关注的弯曲振型与直线部分斜拉桥相比其自振频率差异较大,对抗震分析时关注的弯曲振型,其自振频率差异较小,而不同的结构体系对各种振动模态的影响均较大。
The part of the cable-stayed bridge is analyzed and compared with the straight-line cable-stayed bridge. The static and dynamic characteristics of the cable-stayed bridge are summarized. In the aspect of static force, the geometrical nonlinear analysis of the cable-stayed bridge is carried out. Compared with the linear part of the cable-stayed bridge, the geometric nonlinearity of the cable-stayed bridge has a great influence on the horizontal internal force and displacement. Linear analysis will be significantly increased, non-linear analysis, the impact on the horizontal effects can not be ignored. Dynamically, by varying the radius of curvature and changing the structural system analysis of the structure of the natural vibration characteristics. The part of the cable-stayed bridge involved in vibration direction is one or more than that of the straight-line part of cable-stayed bridge. The bending vibration modes concerned by the part of cable-stayed bridge in wind-resistance analysis differ greatly from the natural frequencies of the cable- For the flexural modes concerned in the analysis of anti-seismic analysis, the difference of their natural frequencies is small, while the influence of different structural systems on various vibration modes is larger.