单斜无粘结内藏钢板支撑剪力墙构造分析

Analysis of constructional details for diagonal unbonded steel plate brace encased in reinforced concrete panel

摘要:

为考察钢板支撑的宽度和屈服强度、支撑与墙板的厚度、支撑钢板宽厚比、支撑与墙板间的间隙和摩擦对支撑墙板受力性能的影响,对单斜无粘结内藏钢板支撑剪力墙的构造进行参数分析.给出采取适宜间隙时,避免墙板在达1/50侧移角前受弯开裂所需的墙板与支撑的最小厚度比的经验公式.结果表明:为避免支撑较早局部屈曲,减小支撑失稳半波数和对墙板的摩擦和冲剪作用,应选用适宜间隙和较厚实的钢板支撑,且支撑宽厚比宜不小于5,不大于19.

Abstract:

A parametric analysis of constructional details for diagonal unbonded steel plate brace encased in reinforced concrete panel(Panel BRB) has been carried out to examine the effects of the width and yield strength of the brace,the brace thickness,the panel thickness,the width to thickness ratio of the steel plate brace,as well as the friction and clearance between the panel and the brace,on the working behavior of the diagonal Panel BRBs.When the appropriate clearance is provided,the regression formula to determine the smallest thickness ratio of panel to brace to prevent the panel from flexural cracking until 1/50 lateral drift is provided.The analysis reveals that,to prevent the brace from earlier local buckling,to reduce the number of buckling waves of the brace,and to decrease the frictional action and the punching shear force applied to the panel by the brace,an appropriate clearance and an appropriate ratio of width to thickness of the plate brace,which should not be larger than 5 but smaller than 19,should be adopted.