型钢混凝土剪力墙的设计方法  

Design method of steel reinforced concrete shear walls

作　　者：马恺泽[1] 刘伯权[1] 梁兴文[2] 

机构地区：[1]长安大学建筑工程学院,陕西西安710064 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《中南大学学报（自然科学版）》2013年第9期3807-3814,共8页Journal of Central South University:Science and Technology

基　　金：中国博士后科研基金资助项目(2012M511958);国家自然科学基金资助项目(51308052)

摘　　要：进行8个剪跨比为2.5的型钢混凝土剪力墙试件的拟静力试验。通过改变试件的轴压比、配箍特征值和配钢率,研究其在往复水平荷载作用下的破坏机理、滞回性能、变形能力以及耗能能力。在试验研究的基础上,对型钢混凝土剪力墙的设计方法进行研究。基于平截面假定并考虑约束边缘构件影响,分析型钢混凝土剪力墙屈服状态和承载力极限状态时的截面应力、应变分布,提出剪力墙的屈服承载力和极限承载力的计算方法;通过建立剪力墙顶点位移角与底部截面曲率和塑性铰区长度的关系,提出基于剪力墙顶点位移角的截面变形能力设计方法。基于分析结果,提出配箍特征值和约束边缘构件长度的建议。研究结果表明:这种剪力墙的破坏形态为墙底部截面约束区混凝土被压碎的弯曲型破坏;试件的滞回曲线饱满,没有明显的捏缩现象;采用本文所提公式所得计算值与试验值基本符合,说明所提出方法的可靠性。A quasi-static test was carried out about eight specimens with the shear span ratio being 2.5.The failure mechanism,hysteretic behavior,deformability and energy dissipation capacity were analyzed by changing the axial load ratio,steel ratio and stirrup characteristic value.Based on the test results,the design method of steel reinforced concrete shear walls was researched.Considering the plane-section assumption and confinement of concrete in confined zone,the stress distribution and strain distribution along the wall section at yield state and ultimate state were proposed.The yield load bearing capacity and ultimate load bearing capacity formula were developed.The relationships between top lateral displacement ratio and cross section's curvature,and plastic hinge length were theoretically deduced.The deformation capacity of structural walls was recommended.The stirrup characteristic value and the length of confined zone were put forward.The results show that the crash of concrete at base leads to failure of the walls.The SRC structural walls have the plump hysteretic curves and no significant pinch phenomenon.The reliability of the method is verified through the comparison of the analysis results and the experimental results.

关 键 词：型钢混凝土剪力墙 屈服状态 极限承载力 截面曲率 塑性铰长度 位移角 

分 类 号：TU398.2[建筑科学—结构工程]