砌体剪力墙的受剪性能及其承载力计算

Shear behavior and calculation of load-bearing capacity of masonry shear wall

本文研究无洞、开洞、无筋以及水平配筋砌体剪力墙受剪性能及其承载力计算,在全面分析影响砌体剪力墙受剪性能的主要因素的基础上,采用弹性有限元法和作者建立的砌体破坏准则,分析了开洞墙的应力分布、裂缝形成及其出现的先后顺序,并提出了不同高宽比、竖向压应力、开洞率、无筋或配筋墙的水平开裂荷载、受剪承载力计算公式,其计算结果与试验结果吻合较好。该方法弥补了现行规范未考虑墙体高宽比影响的不足,扩大了竖向压应力较大时的应用范围,可供砌体结构设计和研究参考。

The shear behavior and load-bearing capacity of unreinforced and reinforced masonry shear wall with or without holes have been researched. On the basis of all-round analysis of the main influencing factors on shear behavior of masonry shear wall, the elastic finite element method and the failure criteria of masonry founded by the authors have been adopted. Then the stress distribution, crack appearance and its sequence of wall with holes are analyzed. At the same time, the calculating formulas of cracking load and shear load-bearing capacity are proposed, which are suitable for different height-width ratios, vertical compressive stresses, hole ratios, unreinforced or reinforced masonry walls. The calculating results agree well with experimental results. This method compensates for the incompleteness of the current cede in which the influence of heightwidth ratio of wall is not considered and enlarges the application range when vertical compressive stress is greater, which provides a reference for masonry structural design and research.