装配式轻钢框架-轻钢骨架轻混凝土墙板结构抗震性能  

Seismic Behavior of Prefabricated Lightweight Steel Frame-light Steel Keel-lightweight Concrete Shear Wall Structure

作　　者：曹万林[1] 杨兆源 CAO Wanlin;YANG Zhaoyuan(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学城市建设学部,北京100124

出　　处：《北京工业大学学报》2024年第2期165-179,共15页Journal of Beijing University of Technology

基　　金：国家重点研发计划资助项目(2018YDF1100903)。

摘　　要：为研究装配式轻钢框架-轻钢骨架轻混凝土墙板结构抗震性能,对1个足尺轻钢框架结构试件和3个足尺轻钢框架-轻钢骨架轻混凝土墙板结构试件进行了低周反复荷载下的抗震性能试验及理论分析,试件变量包括:2种装配构造,即内嵌式装配墙板、外贴式装配墙板;2种轻钢骨架轻混凝土墙板,即框架式轻钢骨架轻混凝土墙板、桁架式轻钢骨架轻混凝土墙板。研究了各试件的破坏特征和损伤演化过程,分析了结构滞回特性、承载力、变形能力、刚度退化、耗能性能和应变。结果表明:装配式轻钢框架-轻钢骨架轻混凝土墙板结构共同工作性能良好,其水平承载力相比轻钢框架提高了204.7%~210.4%,抗侧刚度提高了257.3%~512.5%,结构变形及耗能能力有显著提高;内嵌墙板的自攻钉连接构造以及外贴墙板的螺栓连接构造传力性能可靠,结构具备2道抗震防线的受力特征;基于简化塑性分析模型以及拉压杆软化桁架模型,对试件承载力进行了计算,计算结果与试验符合较好。One full-scale lightweight steel frame(LSF)specimen and three full-scale prefabricated lightweight steel frame-light steel keel-lightweight concrete shear wall(LFSW)structure specimens were designed and fabricated to study the effect of two assembly methods(embedded installation or external installation)and the two light steel keel distribution modes(frame or truss)on the seismic behavior of the LFSW structure.The failure modes and damage evolution process were studied,and the hysteretic characteristics,ultimate strength,deformation capacity,stiffness degradation,energy dissipation and strain characteristics were analyzed by the low-period cyclic load experiment.Results show that the lightweight steel frame and light steel keel-lightweight concrete shear wall has good mutual work performance.Compared with LSF specimen the ultimate strength of LFSW specimens are improved by 204.7% to 210.4% and the initial stiffness improved by 257.3% to 512.5%,and the deformation capacity and energy dissipation are also significantly improved.The self-tapping nail joints of embedded wall and high-strength bolt joints of external wall both have reliable mechanical performance,and the mechanics characteristic of two seismic fortification lines was discovered on LFSW structure.The calculation model of ultimate strength was established based on Simplified Plastic Model and Softened Strut-and-Tie Model,the proposed practical calculating method can evaluate the ultimate strength favorably.

关 键 词：装配式组合结构 轻钢框架 轻钢骨架轻混凝土墙板 抗震性能 低周反复荷载试验 承载力计算 

分 类 号：TU398.2[建筑科学—结构工程]