全装配式桁架梁组合楼盖平面内刚性性能分析及评估  

Analysis and assessment on in-plane stiffness performance of assembly truss beam composite floor

作　　者：张再华[1,2] 舒兴平[1] 贺冉[1,2] 肖时杰 刘泽龙[1] 

机构地区：[1]湖南大学土木工程学院钢结构研究所,湖南长沙410082 [2]湖南城市学院土木工程学院,湖南益阳413000 [3]吉首大学城乡资源与规划学院,湖南张家界427000

出　　处：《建筑结构学报》2017年第8期105-112,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(51278178);湖南省自然科学基金重点项目(09JJ3102)

摘　　要：基于全装配式桁架梁组合楼盖的缩尺模型试验,采用Midas/Gen有限元软件对其进行了分析模拟,通过与试验研究结果的对比,验证了有限元分析模型的准确性。在楼盖刚性假定的基础上,对试验楼盖在楼层水平力作用下的平面内受力变形性能进行了模拟分析。研究结果表明:考虑楼盖平面内刚度与假定楼盖理想刚性两种情形下,该全装配式桁架梁组合楼盖的整体位移偏差较大,而柱端剪力偏差较小;美国规范(ASCE/SEI 41-13)评估法不适合该类楼盖的刚性性能评估;建议综合考虑楼盖整体位移与柱端剪力在考虑楼盖平面内刚度与假定楼盖理想刚性时的偏差均不超过10%作为全装配式楼盖平面内刚性性能分析评估的指标;基于该分析评估指标,全装配式桁架梁组合楼盖属于非刚性楼盖。Finite element （FE） simulation of the reduced scale frame model of a kind of assembly single-tube truss beam composite floor is carried out by using Midas/Gen software. Through the comparison of tested and analytical results, the accuracy of FE model is verified. Based on rigid floor assumption, the simulation analysis of the mechanical and deformation performance for the tested floors is conducted under the floor level force. The study results show that, under the two cases of considering the in-plane stiffness of floor and the assumption of rigid floor, the displacement deviation is great, while the distribution deviation for load is relatively small for the new kind of floor system. The method of ASCE/SEI 41-13 is not suitable, while the standard of deviation 10% for displacement and distribution of load is acceptable for the analysis and assessment on the stiffness performance of the new kind of floor system. Based on such evaluation index, the kind of assembly truss beam composite floor system belongs to elastic floor system.

关 键 词：平面内刚性性能 刚性楼盖 非刚性楼盖 评估指标 有限元分析 

分 类 号：TU398.9[建筑科学—结构工程] TU311.41