(1 郑州大学土木工程学院, 郑州 450001;2 成都基准方中建筑设计有限公司郑州分公司, 郑州 450003)

摘要: 针对轻钢龙骨防火外墙在 L 形角钢连接、异形角钢连接两种连接方式下的平面外受力性能进行了试验研究. 然后采用有限元软件 ABAQUS 对试件进行模拟分析,模拟结果与试验结果吻合良好,验证了有限元模型的有效性. 进而考虑竖向轻钢龙骨间距及布置方式、横向轻钢龙骨厚度、异形角钢连接件个数、L 形角钢与型钢梁连接自攻螺钉个数、L 形角钢厚度六个因素的影响,对轻钢龙骨防火外墙及其与钢框架连接的平面外受力性能进行有限元模拟分析. 结果表明:增加异形角钢连接件个数或 L 形角钢的自攻螺钉个数可提高墙体平面外极限承载力和刚度及连接件平面外刚度,且提高效果最为显著;减小龙骨间距能提高墙体平面外极限承载力及刚度;增加横向轻钢龙骨厚度能提高墙体平面外极限承载力和连接件平面外刚度;增加 L 形角钢厚度可明显提高墙体及连接件平面外刚度.

关键词: 轻钢龙骨; 防火外墙; 平面外受力性能; 连接件; 自攻螺钉

中图分类号:TU333 文献标志码:A 文章编号:1002-848X(2023)05-0127-09

DOI:10. 19701 / j. jzjg. 20201351

Analysis on out-of-plane mechanical behaviors of lightweight steel keel fireproof exterior wall and its connection with steel frame

LI Ke1, WANG Lin1, TANG Wanli2, WANG Xinling1

(1 School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;2 Chengdu JZFZ Architectural Design Co. , Ltd. , Zhengzhou Branch, Zhengzhou 450003, China)

Abstract: The experimental study on the out-of-plane mechanical behaviors of lightweight steel keel fireproof exterior wallswas carried out under the two connection modes of L-shaped angle iron connection and special-shaped angle ironconnection. Then, the finite element software ABAQUS was used to simulate and analyze the specimens. The simulationresults were in good agreement with experimental results, and the validity of the finite element model was verified.Furthermore, considering the influences of six factors including the spacing and arrangement of the vertical lightweight steelkeels, thickness of transverse lightweight steel keel , the number of special-shaped angle iron joints, the number ofself-tapping screws connecting the L-shaped angle iron and the steel beam, and the thickness of the L-shaped angle iron,the finite element simulation analyses of the out-of-plane mechanical behaviors of lightweight steel keel fireproof exteriorwall and its connection with the steel frame were carried out. The results show that increasing the number of special-shapedangle iron joints or the number of self-tapping screws of L-shaped angle iron can improve the out-of-plane bearing capacityand stiffness of the wall and the out-of-plane stiffness of the joint, and the effect is the most significant. Reducing the keelspacing can improve the out-of-plane bearing capacity and stiffness of the wall. Increasing the thickness of transverselightweight steel keel can improve the out-of-plane bearing capacity of the wall and the out-of-plane stiffness of the joint.Increasing the L-shaped angle iron thickness can obviously improve the out-of-plane stiffness of the wall and joint.

Keywords:lightweight steel keel; exterior wall; out-of-plane mechanical behavior; joint; self-tapping screw

∗国家自然科学基金-河南联合基金项目(U1804137),国家重点研发计划项目(2017YFC1501204),中国博士后科学基金项目(2020M672236).

第一作者:李可,博士,副教授,主要从事结构工程加固方面研究,Email:irwinlike@ 163. com.

[引用本文] 李可,王琳,汤万里,等. 轻钢龙骨防火外墙及其与钢框架连接的平面外受力性能分析[ J]. 建筑结构,2023,53 ( 5):127-135. LI Ke,WANG Lin,TANG Wanli, et al. Analysis on out-of-plane mechanical behaviors oflightweight steel keel fireproof exterior wall and its connection with steel frame [ J]. Building Structure,2023,53 ( 5):127-135.