不同间距设置芯柱-纤维石膏速成板组合墙体抗震性能有限元分析

Finite Element Analysis of Seismic Behavior of Composite Walls with Different Spacing Core Concrete and Fiber-Reinforced Gypsum Panel

在对不同间距设置芯柱-纤维石膏速成板组合墙体试验研究的基础上,利用ADINA有限元软件建立不同间距灌芯形式组合墙体的三维有限元模型,结合试验结果验证有限元计算模型的合理性,分析组合墙体的变形破坏特征和抗震性能.通过对组合墙体的数值模拟计算,讨论混凝土灌芯情况和墙体高宽比对组合墙体承载力的影响,结果表明:增加钢筋混凝土芯柱的数目可以有效加强组合墙体的抗侧承载力,组合墙体的破坏模式由弯剪破坏向剪切破坏转变;随着高宽比的增大,组合墙体的开裂荷载和极限承载力降低.

Based on the experimental studies of composite-wall-specimens made of fiber-reinforced gypsum panel with different spacing core concrete, 3-dimensional finite element models of composite walls with different spacing core concrete were established with ADINA finite element software, the validity of which was verified by experimen- tal results. And the failure features and seismic behavior of such walls were analyzed. Numerical simulation was per- formed to discuss the effects of concrete core formation and the depth-to-width ratio on the load-carrying capacity of the composite walls. Results indicate that the load-carrying capacity of the composite walls can be greatly enhanced with increase of the number of core columns which also leads to the transition from bend-shear failure mode to shear failure mode. The cracking load and the ultimate bearing resistance decrease with the rise of ratio of depth-to-width.