腹板加劲冷弯薄壁型钢立柱组合墙体轴压性能试验研究  

Experimental study on axial compression behavior of cold-formed thin-walled steel stud walls with stiffened-web

作　　者：张壮南[1] 郝官旺 王春刚[1] 孔德礼 聂立武[4] 刘淦 ZHANG Zhuangnan;HAO Guanwang;WANG Chungang;KONG Deli;NIE Liwu;LIU Gan(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;College of Civil Engineering,Hunan University,Changsha 410082,China;Tianhua Architecture Planning&Engineering Ltd,Shanghai 200235,China;Construc tion Technology Teaching and R&D Center,Liaoning Jianzhu Vocational College,Liaoyang 111000,China;Huafa Industrial Share,Shenyang 110179,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]湖南大学土木工程学院,湖南长沙410082 [3]上海天华建筑设计有限公司,上海200235 [4]辽宁建筑职业学院建筑技术教学与研发中心,辽宁辽阳111000 [5]华发股份北方区域公司,辽宁沈阳110179

出　　处：《建筑结构学报》2021年第4期103-109,116,共8页Journal of Building Structures

基　　金：国家自然科学基金面上项目(51978422);辽宁省自然科学基金项目(20180550665)。

摘　　要：为研究截面形式、腹板开孔和面板材料等因素对组合墙体轴压性能的影响,对墙柱形式为复杂卷边槽钢(S1截面)、腹板V形加劲复杂卷边槽钢(S2截面)和Σ形复杂卷边槽钢(S3截面),覆面板为定向刨花板(OSB)和石膏板的10片冷弯薄壁型钢立柱组合墙体进行了轴压性能试验。试验结果表明,S1截面、S2截面、S3截面的组合墙体上覆OSB板或石膏板时承载力之比分别为1∶1.36∶1.50和1∶1.34∶1.60;腹板加劲墙柱的主要失稳模式为畸变屈曲;与相同条件下无孔立柱组合墙体相比,腹板加劲有孔立柱组合墙体承载力下降约12.0%,非加劲墙体承载力下降1.6%。基于单根轴压构件的直接强度法开展了考虑墙板约束作用的组合墙体(有孔和无孔)轴压承载力计算方法研究,计算值与试验值的对比分析表明:以现有直接强度法为基础提出的墙体承载力计算方法对腹板非加劲立柱组合墙体的承载力预测较为准确,对腹板加劲立柱组合墙体承载力的预测偏不安全;考虑局部与畸变相关屈曲作用提出的承载力计算方法对腹板加劲立柱组合墙体承载力的预测值与试验值吻合良好。A total of ten cold-formed thin-walled steel stud walls were tested under axial compression. The section types of wall studs were channels with complex edge stiffeners(S1 section), channels with complex edge stiffeners and V-type web stiffeners(S2 section) and Σ-shaped section with complex edge stiffeners(S3 section).The influences of section types, web holes and sheathing on the axial compression behavior of walls were studied. It is shown that when the stud section types are S1 section, S2 section and S3 section, the bearing capacity ratios of OSB and that of gypsum board are 1∶1.36∶1.50 and 1∶1.34∶1.60, respectively. Distortional buckling becomes the main failure mode of wall studs. Under the same conditions, the bearing capacity of the stiffened-web stud walls with holes decreases by 12.0% and that of unstiffened stud walls descends by 1.6%. Based on the direct strength method of single axially compressed member, the axial compression bearing capacity calculation method of walls(perforated and non-perforated) considering the restraint of sheathing was researched. The comparison between calculated and test values illustrates that the bearing capacity calculation method of walls based on the existing direct strength method is relatively accurate to predict the bearing capacity of unstiffened stud walls, but unconservative in the prediction of walls with web-stiffened studs. It is worth mentioning that the bearing capacity calculation method in consideration of local-distortion buckling interaction for walls with web-stiffened studs is in good agreement with the test values.

关 键 词：冷弯薄壁型钢 腹板加劲 腹板开孔 轴压试验 轴压承载力 

分 类 号：TU392.1[建筑科学—结构工程] TU317.1