新型预应力空心楼盖抗剪性能试验研究*
- 摘 要
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（1 西安建筑科技大学土木工程学院, 西安 710055; 2 新乡学院， 新乡 453003)
［摘要］提出一种新型的预应力空心楼盖，即在新型预应力空心板的两正交方向配置预应力受拉钢筋，在预应力空心板两侧设置凹槽和伸出预应力受拉钢筋与边梁连接，板端浇缝处伸出U形筋与预应力受拉钢筋连接，且在板端孔内设置堵头，与后浇缝混凝土形成一体。采取单向低周反复加载进行推出试验，主要研究带拼缝新型预应力空心楼盖的抗剪性能。试验结果表明：新型预应力空心楼盖的U形筋试件整体连接较好，具有较好的延性及较高的抗剪承载能力。对于凹槽试件，通过对凹槽尺寸的合理设计及适当的钢筋配置，能够保证试件达到破坏时具有较大的抗剪承载能力的目的。因此该新型预应力空心楼盖的抗剪承载力能够得到保证，其可在工程中加以应用。［关键词］新型预应力空心楼盖; U形筋; 凹槽; 抗剪性能中图分类号：TU375 文献标识码：A 文章编号：1002-848X(2016)10-0043-07
Experimental research on shear behavior of new-type prestressed hollow floorsLi Qingning1, Li Shufeng1, Jiang Weishan1, Han Chun1,2(1 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; 2 Xinxiang University, Xinxiang 453003, China)Abstract: A new-type prestressed hollow floor is proposed. In the new-type prestressed hollow floor, prestressed tensile reinforcement is arranged in two orthogonal directions. Grooves set in both sides of prestressed hollow floor and extended prestressed tension rebar are connected with the side beams. U-shaped rebar extended from floor end joints are connected with prestressed tensile rebar, and plugs are set at floor end holes to integrate with postpouring joint concrete. One-way low-cyclic loading tests were launched mainly to study the shear behavior of new-type prestressed hollow floor with joints. Test results show that: the integral connection of U-shaped specimens of new-type prestressed hollow floor is reasonable with good ductility and high shear capacity. For groove specimen, rational design of groove dimensions and proper rebar arrangement can ensure that the specimen has a large shear capacity when it is damaged. So the shear capacity of new-type prestressed hollow floor can be guaranteed, and it can be applied in engineering.Keywords: new-type prestressed hollow floor; U-shaped rebar; groove; shear behavior
* 河北省地方科技项目（2011188）。
通讯作者：李书锋，硕士研究生，Email：1371757493@qq.com。
