摘要
混凝土板在集中荷载作用下容易发生冲切破坏,实际工程中已有板柱节点冲切破坏导致结构连续倒塌的案例。通过在混凝土板中配置碳纤维增强复材(CFRP)网格筋以提高混凝土板的抗冲切性能,开展了6个试件的抗冲切力学性能试验,得到了配置CFRP网格筋混凝土板的抗冲切承载力、CFRP网格筋应变、冲切范围内板的位移和板的破坏形态。试验结果表明,在混凝土板中配置CFRP网格筋可以提高混凝土板的抗冲切承载能力和抵抗变形能力,并且在出现冲切破坏后仍具有一定的承载能力。采用CFRP网格筋提高混凝土板抗冲切性能具有工程应用价值。
Concrete slab is prone to punching failure under concentrated load.In the actual project,there are cases where the slab-column joints punching failure occurs and cause the structure to collapse.In this paper,CFRP grids were placed in the concrete slab to improve the punching resistance of concrete slabs.Through the test of the punching mechanical properties of seven specimens,the punching capacity of reinforced concrete slabs with CFRP grids were obtained.And the grid strain,displacement and failure mode of the plate were also obtained.The test results show that the CFRP grids in the concrete slab can improve the punching capacity and resistance to deformation of the concrete slab,and still have a certain bearing capacity after the punching failure.The use of CFRP mesh bars to improve the punching resistance of concrete slabs has engineering application value.
作者
赵英凯
李潇
张继文
黄镇
ZHAO Yingkai;LI Xiao;ZHANG Jiwen;HUANG Zhen(School of Civil Engineering,Southeast University,Nanjing210000,China;Key Laboratory of Concrete and Prestressed Concrete Structure of China Ministry of Education,Southeast University,Nanjing210000,China)
出处
《工业建筑》
CSCD
北大核心
2019年第9期90-94,共5页
Industrial Construction
基金
国家重点研发计划项目(2017YFC0703002-02)
