轻砌块承重墙体受剪性能分析的有限元方法

Finite Element Analysis Method for Shear Performance of Light Artificial Brick Load-Bearing Walls

蒸压加气混凝土砌块在我国建筑中已得到广泛的应用,但大都作为填充墙用于框架结构及混合结构的承重墙等中。根据已有实验研究的结果,研究建立轻砌块承重墙体在水平荷载作用下的有限元分析模型,通过有限元分析结果试验结果的对比,分析了误差产生原因,将蒸压加气混凝土砌块墙的破坏分为受拉破坏和受压破坏,在考虑已有的砌体抗剪强度理论的基础上提出了受拉破坏时考虑竖向正应力和高宽比的影响的抗震抗剪强度简化计算公式。

Autoclaved aerated concrete block building in our country has been a wide range of applications, mostly as filling walls for frame structures and the load-bearing walls for masonry structures. The research, on the basis of experiment, establishes the finite element analysis model for hght artificial brick load-bearing walls under horizontal load. The reasons cause the error were analyzed through comparison between the finite element analysis result and test result. The damage modes of the walls are tensile and compressive. Considering the influence of the vertical normal stress and height to width ratio, a seismic calculation method for shearing capacity of the walls which would damage in tensile mode was proposed based on the existing shearing strength calculation theory for masonry walls.