空间自锚式悬索桥体系转换吊索张拉力的确定

摘要

During the transition of structural system of self-anchored suspension bridge ,because of geo-metric nonlinearity ,the main cables have large displacements ,the lengths of hangers between the main cable clamps and girder anchorage points change a lot w hich are much greater than hangers'elas-tic deformation .Then taking Shangrao Bridge in Jiangxi Province for example ,the equivalent nodal force method is used to explore optimizations of tension order and tension value for the transition of structural system of spacial cables self-anchored suspension bridge with single tower .The correspond-ing conclusions can provide references for the same type of bridges .%自锚式悬索桥体系转换过程中，由于主缆在吊索张拉时表现出几何非线性，发生大位移，主缆索夹点和主梁锚固点之间的吊索长度也随主缆发生了远大于其弹性变形的变化。以江西省上饶大桥为工程实例，采用等效节点力法探讨独塔空间自锚式悬索桥体系转换吊索张拉顺序、张拉力的优化。