带板缝节点新型预应力空心板的抗弯性能试验研究  

Experimental Research on Flexural Behavior of New Type of Prestressed Concrete Hollow Slab Structures with Joint

作　　者：韩春[1,2] 杨萃娜[1] 李青宁[2] 姜维山[2] 

机构地区：[1]新乡学院,453003 [2]西安建筑科技大学,710055

出　　处：《混凝土与水泥制品》2017年第1期43-48,共6页China Concrete and Cement Products

基　　金：国家自然科学基金项目(51508456);河北省地方科技项目(2011188);河南省高等学校重点科研项目(16B560007)

摘　　要：为了提高新型预应力空心楼板结构的整体性,防止由于竖向支承构件失效形成楼板的局部或者连续倒塌,对3块新型预应力空心板足尺模型进行两点对称集中静力加载试验,其中一块为单块预应力空心长板,另两块由预应力空心短板通过板端连接,板侧纵向拼缝连接而成的长板,3个试件的计算跨度相同。分析了竖向荷载作用下新型预应力空心板的破坏形态、裂缝发展、承载能力、应变、荷载-挠度曲线、弯曲刚度等。研究结果表明,带拼缝的新型预应力空心板发生弯曲破坏,破坏未从拼缝处发生,说明连接可靠,受力合理,承载能力和弯曲刚度良好,在实际工程中应用具有较高的安全度。In order to improve the integrity of prestressed concrete hollow slab structures and to prevent vertiaeal support member failure or progressive collapse, the connections between slabs are studied. Three prestressed hollow-core slabs are studied on static test with the condition of concentrated loading by two points symmetrically, one of which is a single long prestressed hollow-core slab, and the other two are a long slab which is connected by two short prestressed hollow-core slabs through connections, the three plates have the same span of calculation. Some performances of the three slabs are analyzed under the vertical load, such as identifying the crack formation, propagation, failure mode, ultimate load carrying capacity, strain, load-deflection curve and bending stiffness. The results show that the prestressed hollow-core slab with connections has good bearing capacity and stiffness in accordance with the whole board. The connection is reliable and reasonable force. It is safe in the practical engineering application.

关 键 词：新型预应力空心板 连接件 承载力 弯曲刚度 挠度 

分 类 号：TU375.2[建筑科学—结构工程]