Experimental research on seismic behavior of the prefabricated frame joints with high strength reinforcement and steel fiber concrete
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TU375.4

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    Abstract:

    In order to study the seismic performance of the prefabricated frame joints with high strength reinforcement and steel fiber concrete, two precast concrete joints and one cast-in-situ concrete joint were conducted under low cyclic reversed load test, the failure characteristic, hysteretic behavior and energy dissipation were analyzed.The results show that the prefabricated beam-column interior joints with high strength reinforcement and steel fiber concrete, which the H-steel was adopted in joint core area, present bending failure of beam end, which meets the seismic design principle of “strong column and weak beam”.The cast-in-situ concrete joint and the joint connected by the steel plate welded end plates occur shear failure in the joint core zone, while the failure mode of prefabricated joint significantly improves.The use of steel fiber in core area and assembly segment can reduce the crack width and propagation, lighten concrete protection spalling and improve the damage pattern of joints.The ultimate load, hysteretic performance and energy dissipation capacity in the prefabricated beam-column joints are improved, the stiffness degradation is retarded and the seismic performance of prefabricated joints are improved.

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张健新,丁传林,戎贤,杨洪渭.装配式高强钢筋钢纤维混凝土框架节点抗震性能试验研究[J].土木与环境工程学报(中英文),2020,42(2):157~164

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History
  • Received:June 02,2019
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  • Online: April 28,2020
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