钢蜂窝夹心冷弯薄壁型钢组合墙体轴压性能试验研究  

Experimental study on axial performance of steel honeycomb sandwich cold-formed steel composite walls

作　　者：王春刚[1] 程天宇 张壮南[1] 刘桐 冯林生 程大业 WANG Chungang;CHENG Tianyu;ZHANG Zhuangnan;LIU Tong;FENG Linsheng;CHENG Daye(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;A+E Design Co.,Ltd,Shenzhen 518031,China;China Jingye Engineering Co.,Ltd,Beijing 100088,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]奥意建筑工程设计有限公司,广东深圳518031 [3]中国京冶工程技术有限公司,北京100088

出　　处：《建筑结构学报》2024年第11期163-172,共10页Journal of Building Structures

基　　金：国家自然科学基金项目(51978422)。

摘　　要：为了研究钢蜂窝夹心冷弯薄壁型钢组合墙体的轴压性能,分析夹心形式(钢蜂窝芯、OSB板夹心或无夹心)、立柱截面形式(加劲截面或非加劲截面)以及有无外覆面板等因素对墙体稳定承载力及破坏模式的影响,对8片墙体进行了轴压试验并开展了有限元模拟验证。结果表明:OSB板夹心墙体均发生整体屈曲破坏,而钢蜂窝夹心墙体均表现为局部屈曲破坏;钢蜂窝夹心与OSB板夹心组合墙体相比,在有无外覆面板时,轴压承载力分别提高5.4%和39%;立柱腹板加劲的钢蜂窝夹心组合墙体比相同条件下立柱非加劲墙体承载力提高30%左右。此外,采用腹板厚度等效并将外覆面板与夹心的侧向支撑作用以等效弹簧刚度的方式计入直接强度法开展了组合墙体轴压承载力计算方法研究。对比组合墙体轴压承载力计算与试验结果发现:基于现行直接强度法所提出的夹心墙体承载力计算方法,在预测立柱腹板非加劲墙体承载力时较为准确,试验结果与计算结果比值的平均值为0.989,而预测立柱腹板加劲墙体承载力时偏不安全,平均值为0.866;通过修正直接强度法公式对立柱腹板加劲钢蜂窝夹心组合墙体的轴压承载力进行计算,计算值与试验及有限元模拟结果吻合良好,平均误差不超过3%。In order to study the axial behavior of honeycomb sandwich cold-formed steel composite walls,the influence of various parameters,including changes in the sandwich types(steel honeycomb core,OSB board sandwich or no sandwich),the stud section types(stiffened section or non-stiffened section) and the presence or absence of sheathings,on the bearing capacity and failure mode of walls were analyzed.Axial compression tests were conducted on eight walls and finite element simulation verification was carried out.It is shown that OSB board sandwich walls all fail in global buckling,while steel honeycomb sandwich walls all fail in local buckling.Compared with OSB board sandwich composite walls,the axial compression bearing capacity of steel honeycomb sandwich walls with or without sheathings is higher,and the increase ratio is 5.4% and 39% respectively.The steel honeycomb sandwich composite wall with web stiffened studs has a bearing capacity approximately 30% higher than that of the non-stiffened stud wall under the same conditions.In addition,the web thickness equivalent method was adopted and the lateral support effect of the sheathing and the sandwich was included in the direct strength method in the form of equivalent spring stiffness,and then a study on the calculation method of the axial compression bearing capacity of the composite wall was carried out.By comparing the experimental results and the theoretical results calculated by using the direct strength method,it is found that the prediction is quite accurate for non-stiffened stud walls(with an average ratio of 0.989 between the test result and theoretical result),while the load capacity of the web stiffened stud walls is overestimated(with an average ratio of 0.866 between the test result and theoretical result).The load-carrying capacity of steel honeycomb sandwich composite walls with web stiffened studs was predicted by a modified direct strength method and the predictions was found in good agreement with the test and finite element simulation results,with

关 键 词：冷弯薄壁型钢 钢蜂窝夹心组合墙体 轴压试验 失稳模式 直接强度法 轴压承载力 

分 类 号：TU398[建筑科学—结构工程] TU317.1