现浇混凝土叠合剪力墙钢筋应力试验研究及混凝土应变分析  

Experimental study on steel stress and concrete strain of composite shear wall

作　　者：姚荣[1,2] 叶燕华[2] 任洁 

机构地区：[1]扬州科技学院,江苏扬州225009 [2]南京工业大学,江苏南京210009

出　　处：《建筑科学》2017年第11期73-80,共8页Building Science

基　　金：国家自然科学基金(No.51178218);扬州市科技局市校合作项目(YZ2016267)

摘　　要：为系统研究现浇自密实混凝土叠合剪力墙的受力及变形特点,在低周反复荷载下,通过对1个全现浇普通混凝土剪力墙和5个现浇自密实混凝土叠合剪力墙的足尺比例试件进行了对比试验研究,分析并对比暗柱、保温层设置及不同轴压比情况下,墙体的钢筋及混凝土应变随荷载变化。分析表明:现浇自密实混凝土叠合剪力墙和现浇普通混凝土叠合剪力墙在低周反复荷载作用下钢筋应变随荷载变化的趋势相似,墙体底部竖向钢筋主要是受弯而不是受剪。混凝土应变值随荷载变化的趋势基本一致,应变值略有差异。在加载过程中预制墙体间的剪式支架起到较好连接作用,保证了预制混凝土双板与现浇层整体协同工作。设置暗柱和适当地增大轴压比均加大对混凝土的约束作用,延缓裂缝开展,有利于改善自密实混凝土叠合墙体的抗震性能。To study mechanical behavior and deformation characteristics of in-situ self-compacting concrete（SCC）composite shear wall,under the low-cyclic reversed loading,one normal concrete（NC） shear wall of full scale specimens with different boundary element details,insulation and axial compression ratio is tested and compared with five SCC composite shear walls,and the variations of steel and concrete strain with load are analyzed.The results show that the trend of the steel strain of NC shear wall is similar with that of SCC composite shear wall as load increment under the low-cyclic reversed loading.The vertical reinforced bar at the bottom of the wall is mainly bending instead of shearing.The trend of strain value of concrete is consistent with load,and the strain values are slightly different.During the loading process,the precast panels and cast-in-place SCC layer combine to form a whole wall by scissor bars and work together.It is also helpful to improve the seismic performance by setting hidden columns and increasing axial compression ratio,meanwhile,which can delay the crack developing.

关 键 词：自密实混凝土 钢筋应力 混凝土应变 叠合剪力墙 

分 类 号：TU375[建筑科学—结构工程]