作　　者： ; ; ; ; (李霞）;

机构地区： 同济大学土木工程学院桥梁工程系

出　　处： 《结构工程师》 2008年第3期155-158,共4页

摘　　要： 针对荷载沿无应力长度均布的弹性悬链线模型在悬索桥施工监控中的应用,总结了五种常见的基本计算类型:己知索段的跨度和索段左端点内力求索段的无应力长度、两端点高差;己知索段的无应力长度和索段左端点内力求索段的跨度、两端点高差;己知索段的跨度、两端点高差和索段的无应力长度,求索段的内力;已知索段无应力长度、左端点内力,求温度升高情况下索段两端点的高差;已知索段的跨度、两端点高差和索段的无应力长度,和索段中间一点的横坐标,求该点相对于左端点的高差。简要地介绍了各种基本计算类型应用的范围及其求解思路。 When the elastic catenary cable element,in which dead weight is distributed along the unstrained length of the cable, is used in the construction control calculation of suspension bridges ,five typical problems will occur： how to determine the unstressed cable length and the position of one end from the given position of the other end, the horizontal space between two ends and the internal force vector of the cable; how to determine the horizontal and vertical spaces from given the unstressed length and the internal force vector of the cable ; how to determine the internal force vector from given the unstressed length and the positions of both ends of the cable; how to consider the influence of temperature; and how to determine the position of an arbitrary point on the cable from its given unstressed length and the positions of both ends. Methods to solve all of these problems were introduced in the paper.

关 键 词： 悬索 弹性悬链线 迭代法

领　　域： [建筑科学] [交通运输工程] [建筑科学] [交通运输工程]