无界面钢筋的叠合板式剪力墙受力性能试验研究  

Experimental study on mechanical behavior of superimpose slab shear walls without interface steel

作　　者：初明进[1] 刘继良[2] 侯建群[3] 刘木禾[2] 王刚[2] 邱光明[2] 

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]烟台大学土木工程学院,山东烟台264005 [3]清华大学建筑设计研究院,北京100084

出　　处：《建筑结构学报》2016年第10期90-97,共8页Journal of Building Structures

基　　金：国家自然科学基金项目(51378450;51508490)

摘　　要：为研究无界面钢筋的叠合板式剪力墙的受力性能,进行了3个试件的拟静力试验,分析了预制混凝土板与现浇层之间的结合面特征,以及边缘纵筋配筋量对墙体压弯承载力、滞回特性、延性及刚度的影响。结果表明:叠合板式剪力墙变形能力良好,位移延性系数超过6.5;预制混凝土板面采用键槽构造措施或粗糙面均能保证后浇与预制混凝土的有效连接,在正常使用阶段,后浇与预制混凝土结合面未出现损伤,相同边缘纵筋的墙体压弯承载力基本相同;采用键槽的连接性能优于粗糙面连接性能,前者后浇与预制混凝土间裂缝的开展宽度和长度明显小于后者,且墙体刚度退化速率减缓;提高墙体的边缘纵筋配筋量可延缓后浇与预制混凝土结合面竖向裂缝的发展,减小结合面破坏区域,改善墙体的受力性能。采用现行规范中的剪力墙压弯承载力计算公式计算叠合板式剪力墙的承载力,与试验结果吻合良好。A new type superimposed slab shear wall which is without interface steel is presented. To study the compression-bending capacity,hysteretic behavior,ductility and stiffness of the superimposed slab shear walls without interface steel,three innovative superimposed slab shear walls were quasi-statically tested under low cyclic lateral loading to analyze the effects of joint surface between precast concrete slab and cast-in-place concrete and quantity of edge vertical reinforcement. It is proved that the new type superimposed slab shear walls have adequate deformability and the displacement ductility ratio is more than 6. 5. When the interface of precast slab is keyway structure or rough,the connection between precast concrete and cast-in-place concrete is reliable and there is no damage at the joint surface under the state of serviceability. If the edge vertical reinforcement is the same,the interface structure of precast concrete slab is not effective on the compression-bending capacity of the superimposed slab shear walls. The result also shows that the connection property of the keyway structure is superior to the rough surface,because the height and width of vertical crack between precast concrete and cast-in-place concrete of the former is less than the latter,and the rate of stiffness degradation of the former is slower. As a result,the development of vertical crack between precast concrete and cast-in-place concrete is limited and the failure region of joint surface is decreased when increasing the quantity of edge vertical reinforcement. The result of the new type superimposed slab shear wall,which is calculated by the formulas of compression-bending capacity for shear wall in the current codes is compliant with test result.

关 键 词：叠合板式剪力墙 键槽构造 粗糙面 混凝土结合面 拟静力试验 受力性能 

分 类 号：TU398.2[建筑科学—结构工程] TU317.1