夹芯墙板覆面冷弯薄壁型钢承重复合墙体受剪试验

发布时间：2018-01-15 02:25

本文关键词：夹芯墙板覆面冷弯薄壁型钢承重复合墙体受剪试验　出处：《建筑结构学报》2017年07期 　论文类型：期刊论文

【摘要】：为满足多层冷弯薄壁型钢房屋建筑的抗震及防火要求,同时兼顾施工便捷性,提出了夹心墙板覆面的新型冷弯薄壁型钢复合墙体,并完成了11片足尺模型水平加载试验。试验表明:1)复合墙体的受剪破坏主要由墙板周边的螺钉连接失效引起,即螺钉将墙板撕裂或螺钉剪断引起,墙板与自攻螺钉之间的连接力学性能成为影响复合墙体受剪性能的主要因素;增大墙板厚度或者采用玻镁板代替石膏板可提高复合墙体抗剪性能,而龙骨立柱的截面尺寸对复合墙体受剪性能影响不明显;2)同侧墙板层数的增加对复合墙体受剪承载力及刚度虽有明显提高,但未达到线性叠加程度;夹心墙板的使用有利于墙体蒙皮效应的发挥,相应的墙体受剪性能优于墙体同侧双层墙板覆面时的受剪性能;3)蒸压加气混凝土(ALC)板周边与自攻螺钉的连接区域在较低水平荷载作用下出现板材开裂现象,故不宜采取ALC板参与墙体受力的连接方式。研究给出了新型冷弯薄壁型钢复合墙体的受剪承载力及抗剪刚度设计指标,供工程设计参考。
[Abstract]:In order to meet the earthquake and fire in multistory housing construction requirements, taking into account the convenience of construction, puts forward a new type of cold-formed steel composite wall cladding sandwich wallboard, and 11 full-scale horizontal loading tests were done. The test showed that: 1) composite wall shear wall surrounding the connecting screw is mainly composed of the failure, which will be torn or cut off wall screw screw by tapping screw connection between the wall and the mechanical properties as the main factors affecting the shear performance of composite wall; increasing wall thickness or using magnesium plate instead of gypsum board can improve the shear performance of composite wall, and the section size of the column keel composite wall shear the performance impact is not obvious; 2) increased with side wall layers of composite wall shear bearing capacity and stiffness is increased significantly, but did not reach the degree of linear superposition; the sandwich wallboard Is conducive to wall diaphragm effect, the corresponding shear wall under shear wall with side performance is better than the double wall cladding; 3) autoclaved aerated concrete (ALC) plate and a tapping screw connection area surrounding the plate cracking phenomenon in the role of low load, it should not take ALC in the wall force connection. Research gives the shear bearing capacity and shear stiffness index model design of cold-formed steel composite wall, a reference for engineering design.

【作者单位】：中国矿业大学深部岩土力学与地下工程国家重点实验室;公安部天津消防研究所建筑消防工程技术公安部重点实验室;东南大学混凝土与预应力混凝土结构教育部重点实验室;
【基金】：国家自然科学基金重点项目(51538002) 江苏省自然科学青年基金项目(BK20150605) 建筑消防工程技术公安部重点实验室开放课题(KFKT2015ZD05)
【分类号】：TU392.1
【正文快照】： 3.东南大学混凝土与预应力混凝土结构教育部重点实验室,江苏南京210096)0引言多层冷弯薄壁型钢房屋建筑结构在国内外应用逐渐增多,其中,由冷弯薄壁型钢龙骨骨架及在骨架两侧通过自攻螺钉连接覆面墙板所形成的冷弯薄壁型钢复合墙体,作为主要承重及抗侧力部件,受到了国内外学者

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