张弦梁结构刚度的研究与分析

Research and analysis for stiffness of string beam structure

对张弦梁结构施加均匀增大的外部荷载,得到了四个位移记录点的位移随荷载变化情况,通过分析不同点位移—荷载的关系得到了结构刚度变化的情况,指出结构刚度在外荷载作用下变化,导致分析结构在地震作用下响应时,不能采用振型分解反应谱法,只能采用时程分析法。

This article imposes external load of uniform increase on the string beam structure, gets the displacement changs of four displacement record points as the changs of external load. Through analysis of dispLacement-load of different points. We get the stiffness changing of the beam string structure. Points out that the changes of the structure stiffness under the external loading effect causes the analysis structure can not be undertaken with the forcing decouping response spectra method under the influence of earth quakes, but with the time-travel analyzing method.