楼板厚度对超高层结构抗震性能的影响分析

为了改善加强层引起的结构竖向刚度突变产生的影响，目前结构设计中通常采用加厚加强层或相邻几层楼板厚度的方式。本文对设置有水平加强层的钢筋混凝土框-筒超高层结构，采用时程分析的方法进行三维有限元动力分析，通过对不同结构方案进行对比，加厚加强层相邻的若干层楼板，分析楼板厚度对结构抗震性能的影响。结果表明，通过增大加强层上、下若干层的楼板厚度，对缓减由加强层引起的结构楼层剪力突变效果并不明显，并且会增大结构的自振周期和底部弯矩。

The effect of thickness of slab on the seismic performance of super high-rise building structure

At present, in order to improve the effect caused by vertical rigidity revulsion of strengthened storey, structure engineers always take the measure of increasing the thickness of slab of the strengthened storey or near the strengthened storey. Time-history analysis and finite element method of dynamics are applied to analyze the response of frame core-wall super high-rise structure with strengthened storey , and comparisons are made between some different structural arrangements. We analyze the structure's seismic performance by increasing the thickness of slab, which is near the strengthened storey. The result shows that, to some extent, it can decrease the revulsion of storey shear, but the effect is not evident, and it will increase structure's period and bottom moment.