装配式UHPC空心剪力墙水平接缝试验研究

Experimental Research on Horizontal Connection for Prefabricated UHPC Hollow Shear Walls

提出了一种应用于装配式超高性能混凝土(UHPC)空心剪力墙水平接缝的连接形式。对带有水平接缝的装配式UHPC空心剪力墙试件和同等尺寸的现浇UHPC空心剪力墙试件进行了拟静力试验,以研究其破坏形式和受力机理,并进行分析对比。结果表明:灌浆U形筋连接的装配式UHPC剪力墙试件的抗侧刚度和屈服荷载与现浇剪力墙试件基本相同,但由于水平接缝的存在,两者极限荷载和破坏状态存在差异;两者的滞回曲线均较为充实,骨架曲线趋势基本一致;在灌浆U形筋连接装配式UHPC空心剪力墙实际工程应用中,可等同于同尺寸的现浇UHPC空心剪力墙进行设计。

A connection node for horizontal joints in prefabricated ultra-high-performance concrete(UHPC)hollow shear walls was proposed.The prefabricated UHPC hollow shear wall specimen with horizontal joint joints and the cast-inplace UHPC hollow shear wall specimen of the same size were tested by pseudo-static tests to study the failure mode and mechanical mechanism,and to analyze and compare.The results show that the lateral stiffness and yield load of the prefabricated UHPC shear wall specimens connected with grouted U-shaped bars are basically the same as those of the castin-place shear wall specimens,but the ultimate load and failure state of the two specimens are different due to the existence of horizontal joints.The hysteresis curves of both are relatively full,and the trend of the skeleton curve is basically consistent.In the practical engineering application of grouting U-bar connected prefabricated UHPC hollow shear wall,the design can be equivalent to that of cast-in-place UHPC hollow shear wall of the same size.