影响钢筋混凝土剪力墙抗剪承载力因素分析

Analysis of Factors on Shear Strength of Reinforced Concrete Shear Walls

利用正交试验设计法、规范方法对影响钢筋混凝土剪力墙抗剪承载力的各因素进行分析,考虑的因素包括混凝土强度等级、高宽比、横向钢筋配筋率,得出了各种影响因素的重要程度。影响钢筋混凝土剪力墙抗剪承载力最敏感的因素是高宽比,混凝土强度次之,横向钢筋配筋率影响最小。随着高宽比的增大,混凝土强度等级的提高剪力墙抗剪承载力呈上升趋势。由于钢筋混凝土低剪力墙中水平钢筋对抗剪承载力的作用有限,当其抗剪承载力不足时,应主要通过调整截面尺寸或提高混凝土强度等级来满足抗剪承载力的要求。

Shear strength of RC shear wall and other different factors were analyzed by using orthographic design method and code method, covering concrete strength gradation, the ratio of depth to width, transverse steel reinforcement ratio, the results indicated the important degree of different factors. The ratio of depth to width was the most important factor to affect the shear strength of component, next to the concrete strength gradation, the minimum factor was the transverse steel reinforcement ratio. Shear strength of RC shear wall increased with the enlargement of the ratio of depth to width and of concrete strength gradation. As shear strength was not obvious with yield strength of transverse reinforcement, the sectional dimension needed adjusting, or increasing the concrete strength gradation to satisfy shear strength.