混凝土与木混合结构中木楼盖计算模型

Numerical Simulation of Wood Diaphragm in Concrete and Timber Hybrid Structure

摘要:

采用有限元软件Sap2000建立了2种不同的混凝土与木混合结构模型,即完全木楼盖模型和简化木楼盖模型；采用这2种模型对于1个单层混合结构抗侧力试验进行了数值模拟；采用简化木楼盖模型和刚性楼盖模型分别建立了6层混合结构模型，对模型进行了抗震分析，并将2种楼盖模型的计算结果进行了对比.结果表明：完全木楼盖模型与简化木楼盖模型都能够较好地模拟单层混合结构试验模型的水平抗侧力性能，简化木楼盖模型可以替代完全木楼盖模型应用于混合结构的受力分析；采用简化木楼盖模型对6层混合结构进行抗震分析所得到的中部框架受到的水平力略大于边框架，简化木楼盖模型与刚性楼盖模型进行时程分析所得到的顶点时程位移曲线较为接近.

Abstract:

Based on Sap2000,two different concrete-timber hybrid structural models:detailed timber floor model and simplified timber floor model were established and used to do numerical simulation for a test of a one-storey hybrid structure under lateral load.At last,simplified floor model and rigid floor model were used to build up two 6-storey structural models and were analyzed under seismic load.Results show that,both of detailed timber floor model and simplified floor model can simulate well the hybrid structure test; in order to simplify the analysis of hybrid structure,the simplified floor model can take place of the detailed floor model; according to the seismic analysis results of simplified floor model of 6-storey building,the mid-frame takes more lateral load than side-frame;the time history seismic analysis results show that,the time-displacement curves on the top of simplified wood diaphragm model and rigid floor model are very close.