在装配式钢结构住宅建筑发展过程中,对外围护体系提出了新的要求。本文研究一种应用于钢结构住宅的新型轻钢结构外墙挂板,分析挂板的抗弯刚度并进行试验研究。研究轻钢桁架龙骨外墙挂板使用阶段刚度,通过对墙板刚度的理论分析确定影响墙板刚度的因素。共选取了桁架龙骨个数、桁架龙骨高度、龙骨钢筋直径以及内外饰面板的厚度这四个因素,通过四组共12个3 600×2 400 mm的足尺模型进行试验,探究了在单调荷载作用下各个因素对墙板的刚度影响,试验发现改变龙骨的布置及设计能大幅改变墙板的刚度。根据试验数据计算得到墙板实测刚度值,对比分析不同的刚度理论值与实测值,确定对桁架龙骨刚度进行分析的计算方法可有效的反映墙板整体的刚度,最大误差为13.5%。本文的研究可以为这类轻钢外墙挂板的刚度设计提供参考。
Abstract
In the development process of prefabricated steel structure residential buildings, new requirements have been put forward for the external protection system. This paper studies a new type of light steel structure exterior cladding wall applied to steel residence, analyzes the flexural rigidity of the wall and conducts experimental research. Rigidity of light steel truss keel external wall was studied. Factors influencing the rigidity of the wall were determined through theoretical analysis. In the experimental study, the number of truss keels, the height of the truss keel, the diameter of the keel steel bar and the thickness of the inner and outer panels are selected as the research variables. Four groups of 12 full-scale models of 3 600×2 400 mm were tested under monotonic loading. It was found that changing the layout and design of the keel can greatly change the stiffness of the wall panel. According to the test data, the measured stiffness value of the wall panel was calculated,and the different theoretical stiffness values and the actual measured values were compared. It is determined that the calculation method that only analyzes the stiffness of the truss keel can effectively reflect the overall stiffness of the wall panel. The maximum error is 13.5%. The study can provide a reference for the rigidity design of this kind of light steel exterior cladding wall.
关键词
装配式钢结构 /
复合墙板 /
钢筋桁架 /
刚度 /
有效惯性矩法
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Key words
prefabricated steel structure /
composite wall panel /
steel bar truss /
stiffness /
effective moment of inertia
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脚注
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基金
国家自然科学基金项目（51668063）; 水利重点科学基金课题（SLXK2019-09）
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