冷弯薄壁型钢组合墙体简化计算模型研究  

Simplified Calculation Model of Cold-formed Thin-walled Steel Composite Wall

作　　者：管宇[1] 周绪红[1,2] 石宇[2] 李松松 聂少锋[1] 姚欣梅 GUAN Yu;ZHOU Xuhong;SHI Yu;LI Songsong;NIE Shaofeng;YAO Xinmei(College of Civil Engineering,Chang’an University,Xi’an 710061,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area(Ministry of Education),Chongqing University,Chongqing 400045,China)

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]山地城镇建设与新技术教育部重点实验室(重庆大学),重庆400045

出　　处：《湖南大学学报（自然科学版）》2023年第1期59-68,共10页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51908047);陕西省自然科学基础研究计划项目(2022JM-227,2022JQ-570);中央高校基本科研业务费专项资金资助项目(300102281205,300102289205);陕西省重点研发计划项目(2021SF-519)

摘　　要：组合墙体作为冷弯薄壁型钢结构体系的主要承重和抗侧力构件,其受力性能对房屋整体结构抗震性能的影响应重点关注.基于此,建立冷弯薄壁型钢组合墙体简化计算模型,采用非线性对角弹簧模拟分析组合墙体的剪切变形,设置梁式杆件模拟分析组合墙体的弯曲变形,且墙体门窗洞口的影响也可在模型中体现.借鉴日本规范建议的墙体等代拉条法,推导出简化计算模型中对角弹簧轴向刚度的计算方法.结合组合墙体拟静力加载试验,验证了组合墙体简化计算模型的正确性,该模型满足基于弹性的设计要求,不适用于结构的弹塑性分析.最后,基于组合墙体的简化计算模型,参照振动台试验试件建立了3层冷弯薄壁型钢结构房屋的有限元模型,通过弹性动力时程分析验证了组合墙体简化计算模型的正确性,可为轻钢结构的抗震设计提供参考.The composite wall is the main load-bearing and lateral force-resisting component in cold-formed thin-walled steel structural systems,and the influence of the mechanical behavior of composite walls on the seismic performance of the whole building structure should be paid more attention to.Based on this,a simplified calculation model of cold-formed thin-walled steel composite walls was established.A nonlinear diagonal spring was used to simulate the shear deformation of the composite wall,and a beam-type member was set to simulate the bending de⁃formation of the composite wall.The influence of the door and window holes can be constructed in the model.The cal⁃culation method of the axial stiffness of the diagonal spring in the simplified calculation model is derived by referring to the wall equivalent brace method recommended by the Japanese code.Combined with the pseudo-static load test of the composite wall,the correctness of the simplified calculation model of the composite wall is verified.The model meets the design requirements based on elasticity but is not suitable for the elastic-plastic analysis of structures.Fi⁃nally,based on the simplified calculation model of the composite wall,the finite element model of three-storey cold-formed thin-walled steel structural building was established with reference to the shaking table test specimens.The validity of the simplified calculation model of the composite wall was verified by elastic time-history dynamic analy⁃sis,which can provide a reference for the seismic design of light-steel structures.

关 键 词：冷弯薄壁型钢 组合墙体 计算模型 侧向变形 弹性动力时程分析 

分 类 号：TU392.5[建筑科学—结构工程] TU398.2