竖向分布钢筋单排间接搭接的带现浇暗柱预制剪力墙抗震性能试验

摘要

To further study the seismic behavior of precast reinforced concrete shear walls in which the vertically distributed reinforcements are indirectly connected with a single row of rebars spliced by grouted straight-thread couplers,quasi-static tests are carried out for five specimens with cast-in-situ boundary elements.Three specimens have cast-in-situ boundary element at one end,while the others have cast-in-situ boundary element at both ends.The test results indicate that the cast-in-situ boundary elements and the precast shear wall work together as one unit,horizontal cracks and extended diagonal cracks are the main cracks of the specimens,horizontal cracks run through the interface between the wall and the base beam,vertical rebars yield before the specimen reaches its strength,and the concrete crushes at the bottom of the wall.All specimens fail in compression-bending mode.The ultimate drift ratios of specimens are 1/99~1/62.The current code formulas are suitable for calculating the compression-bending strength of precast shear walls,and the contribution of vertical distributed reinforcements should be taken into consideration.%为进一步研究竖向分布钢筋与单排布置的连接钢筋间接搭接、连接钢筋采用直螺纹套筒灌浆连接的带现浇暗柱预制剪力墙抗震性能,完成了5个试件的拟静力试验,其中3个试件一端带暗柱,2个试件两端带暗柱。试验结果表明,现浇暗柱与预制剪力墙作为整体共同工作,试件以水平裂缝及其延伸的斜裂缝为主,墙底与地梁之间产生水平通缝,达到承载力前竖向钢筋受拉屈服,墙底混凝土压碎,破坏形态为压弯破坏;可采用现行规范公式计算预制剪力墙的压弯承载力,且考虑竖向分布钢筋的作用;试件的极限位移角达1/99～1/62。