【摘要】 双塔三跨式斜拉桥通常采用对称的结构布置形式,有时由于地形及交通上的特殊要求,会采用具有变宽度主梁的非对称斜拉桥结构。以某非对称变宽度斜拉桥工程为例,通过有限元计算模型对其力学性能进行分析,研究了变宽度主梁对斜拉索、主梁及桥塔的影响。结果表明,非对称变宽度斜拉桥结构在初始成桥状态下具有一定非对称性,而在使用荷载作用下结构的非对称性影响可忽略不计。更多还原

【Abstract】 The double-pylon three-span cable-stayed bridge is often in the type of symmetrical structural arrangement. Sometimes the cable-stayed bridge is in the type of asymmetric variable width structural girder because of the special requirements of terrain and traffic. Based on an asymmetric variable width cable-stayed bridge project, the article analyzes its mechanics property and studies the influence of main variable width girder on stayed cable, beam and pylon by the finite element calculation model. The results indicate that this kind of structure has an obvious asymmetry at the initial state of bridge finishing. The asymmetry influence of structure can be ignored in the service load.更多还原