作　　者： ; ; ; ;

机构地区： 同济大学土木工程学院桥梁工程系

出　　处： 《华中科技大学学报（自然科学版）》 2014年第10期124-127,共4页

摘　　要： 以悬链线方程为基础,将主缆对桥塔的约束等效为弹簧,通过变分方法推导了主缆对多塔悬索桥中塔纵向弹簧约束刚度的表达式,并建立有限元模型对公式进行验证.研究结果表明:基于悬链线的中塔刚度公式比已有文献具有更高的精度,在主缆无应力长度确定的情况下,主缆弹簧刚度主要与荷载集度、主缆在塔顶的水平及竖向分力有关. The main cable was treated as springs in considering its constraint on the tower .The for-mula of the longitudinal constraint stiffness of springs was derived by variational method based on cat-enary equation ,and a finite element model was established for verification .The results show that the tower stiffness formula based on catenary has higher accuracy ;the cable spring stiffness is mainly re-lated to the unit length weight of the bridge as well as the horizontal and vertical components of the main cable in the overhead of the mid-tower ,while the unstressed length of the main cable is deter-mined .

关 键 词： 悬索桥 主缆 刚度 中塔 悬链线 变分

领　　域： [建筑科学] [交通运输工程]