波纹管浆锚连接装配式剪力墙抗震性能

Seismic performance of assembled shear wall connected by bellows grout anchor

通过设计并制作5个装配式剪力墙试件及1个同尺寸现浇试件,采用拟静力试验,研究不同局部构造对波纹管浆锚连接装配式剪力墙抗震性能的影响。结果表明,预制墙试件和现浇墙试件的破坏形态基本相同,为边缘构件竖向受拉钢筋屈服、墙底混凝土受压破坏,竖向植入钢筋的浆锚连接起到了较好的传力作用,使墙体与底座连接成为整体;波纹管外螺旋箍筋可提高试件的延性及前期刚度,但对试件承载力无太大影响;增设无黏结套筒的同时需要增加植入钢筋黏结段的长度;气泡纸粗糙面可满足叠合面抗剪及新旧混凝土紧密连接的要求,增设的机械套筒对试件本身的力学性能无不利影响。

By designing and fabricating five assembled shear wall specimens and one cast-in-situ specimen of the same size,the effects of different local structures on the seismic performance of the fabricated shear wall connected by bellows grout anchors were studied by quasi-static test.The results show that the failure modes of the prefabricated wall specimens and the cast-in-place wall specimens are basically the same,which plays a very good role in the yielding of the vertical tensile steel bars of the edge members,and the compression failure of the concrete at the bottom of the wall.The grout anchor connection of the vertically implanted steel bars plays a an important role in force transmission,which connects the wall and the base as a whole.The outer spiral stirrup of the corrugated pipe can improve the ductility and the early stage of the stiffness.The stiffness in the early stage shows little effect on the bearing capacity of the specimen.The length of the bonding section of the implanted steel bar needs to be increased when the unbonded sleeve is added.The rough surface of the bubble paper can meet the requirements of the shear resistance of the superimposed surface and the tight connection between the old and new concrete.The additional mechanical sleeve shows no side effect on the mechanical properties of the specimen itself.