求超静定结构影响线方程的新方法  

NEW METHOD FOR THE SOLUTION OF INFLUENCE LINE EQUATION OF SUPER STATIC STRUCTURE

作　　者：王国安[1] 

机构地区：[1]华北科技学院基础部,北京101601

出　　处：《工业建筑》2006年第z1期365-367,共3页Industrial Construction

摘　　要：直接利用解常载作用下超静定结构的位移法,将转角位移的固端弯矩和未知节点位移作为移动载荷在位置的函数。由平衡条件建立各杆端弯矩的影响线方程或杆端剪力影响线方程,再利用迭加原理求得其他量值的影响线方程。该法通俗易懂,对有侧移无侧移结构均适用,且也可用来求桁架、多跨静定梁和多跨多层静定刚架各量值的影响线。Using the displacement method for the solution of super-static structure under the normal loads,the bending moment of fixed end and unknown node displacement in the equation about rotabed angles are taken as the function of the position of moving load.Based on this the influence line equations of bending moment and shear force of the end of each bar are established.Then it is solved the influence line equation of other quantities by the principle of superopsing.The presented method is suitable for the analysis of structures with or without sways.

关 键 词：影响线 弯矩函数 剪力函数 位移函数 

分 类 号：TU311.4[建筑科学—结构工程]