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Concrete panel thickness demand for the design of composite steel plate shear wall

机译：混凝土板厚度对复合钢板剪力墙设计的要求

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摘要

Composite steel plate shear walls (C-SPWs) are composed of an infill steel plate and reinforced concrete encasements. With an adequate thickness, the concrete encasement can effectively prevent the premature buckling of the infill steel plate. Researchers have provided nonconservative concrete thickness demands through analyses of approximate elastic buckling, for which the analytical model is too simplistic to simulate C-SPW buckling. In this paper, the buckling of C-SPW is addressed using a nonlinear finite element method. To assist this method, a formula for the buckling strength of C-SPW is theoretically developed. Utilizing the results of nonlinear finite element analysis on C-SPW, the effects of concrete panel thickness, concrete elastic modulus, infill steel plate thickness, panel aspect ratio, and stud spacing on the infill steel plate buckling are analyzed, and the critical drift ratio corresponding to the buckling of the infill steel plate is obtained. According to the criterion that the C-SPW will not buckle until its drift ratio achieves the drift limit (0.4%), the minimum concrete panel thicknesses demands are captured from finite element analysis. Fitting these predicted minimum concrete thicknesses, an available formula is proposed for the concrete thickness demand in the design of C-SPW.
机译：复合钢板剪力墙（C-SPW）由填充钢板和钢筋混凝土外壳组成。具有足够的厚度，混凝土外壳可以有效地防止填充钢板的过早屈曲。研究人员通过对近似弹性屈曲的分析提供了非保守的混凝土厚度要求，为此，分析模型过于简单，无法模拟C-SPW屈曲。本文采用非线性有限元方法解决了C-SPW的屈曲问题。为了辅助该方法，理论上开发了C-SPW屈曲强度的公式。利用C-SPW的非线性有限元分析结果，分析了混凝土面板厚度，混凝土弹性模量，填充钢板厚度，面板纵横比和螺柱间距对填充钢板屈曲的影响，并确定了临界漂移率得到与填充钢板的屈曲相对应的值。根据C-SPW在其漂移率达到漂移极限（0.4％）之前不会弯曲的准则，从有限元分析中获取了最小混凝土面板厚度的要求。拟合这些预测的最小混凝土厚度，为C-SPW设计中的混凝土厚度需求提出了一个可用的公式。

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