模块化装配式钢结构桁架梁受弯性能试验研究  

EXPERIMENTAL RESEARCH OF FLEXURAL BEHAVIOR OF THE TRUSS GIRDER IN MODULARIZED PREFABRICATED STEEL STRUCTURES

作　　者：张爱林[1,2] 赵越[1] 倪真[1] 刘学春[1,2] 

机构地区：[1]北京工业大学,北京100124 [2]北京市高层和大跨度预应力钢结构工程技术研究中心,北京100124

出　　处：《工业建筑》2015年第10期18-23,共6页Industrial Construction

基　　金：国家自然科学基金项目(51278010);北京市自然科学基金重点项目(13H10089)

摘　　要：与传统实腹梁相比,模块化装配式钢结构体系中的钢桁架梁腹部空隙大,更便于管线综合穿过,有效地增加了房间的净高,而且更加经济、美观。通过对钢桁架梁静力性能的试验及有限元分析研究,获得装配式钢结构体系中钢桁架梁极限承载力及变形破坏特征。钢桁架梁破坏位置集中于加载点附近上弦杆处,各腹杆应变均未达到屈服应变值,桁架梁弦杆先于腹杆破坏,符合结构"强剪弱弯"的设计原则;桁架梁极限荷载值与屈服荷载比值较大,说明构件从屈服到破坏有较大的安全储备;桁架梁有限元模拟结果与试验结果互相验证,有较好的吻合度。Compared with traditional solid web steel beams, the holes in the web of truss girders in the prefabricated steel structure of housing system enable the pipelines to pass through easily, which provides a higher room clear height and makes the structure economical and decorated.Experimental research and nonlinear finite element analysis of the steel truss girder were carried out.The ultimate bearing capacity and deformation characteristic of the steel truss girder were obtained.The failure zone mainly occurred at top chord near the loading point, and none of the web members reached the yield strain.When the girder was damaged, webs were at a relatively small force damaged after the chord, which could meet the design requirements of “strong shear and weak bending”.The big difference between yield load and ultimate load made the members have a large safety reserve.The finite element analysis results and the experiment results were verified each other, showing a better agreement.

关 键 词：模块化 装配式 钢桁架梁 受弯性能 承载试验 

分 类 号：TU391[建筑科学—结构工程]