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        Experimental Study on Static and Fatigue Performance of Uplift-Restricted and Slip-Permitted Connectors

        Xian Liang,Xiaozhou Liu,Nuocheng Tian 한국강구조학회 2023 International Journal of Steel Structures Vol.23 No.1

        The uplift-restricted and slip-permitted (Referred to as “URSP”) connector is a new type of structure applied in the negative bending moment region of continuous steel–concrete composite beams. The application of the URSP connector can effectively releases the shear stress between the interface of composite beam, enhances the interface slip capacity, and then improves the crack resistance of concrete slab. In order to investigate the static and fatigue performance of the URSP connector, static and cyclic loading tests were carried out on two and six tensile specimens respectively. Through the experimental study, the following conclusions are obtained: (1) The static failure mode of the URSP connector is connector tensile yielding, the fatigue failure modes include tensile yield of connector and punching shear failure of concrete. (2) The fatigue stress amplitude played a decisive role in the fatigue life of the URSP connector, the fatigue life decreased sharply with the increase of the stress amplitude. Finally, the failure mechanism and S–N curve of URSP are obtained.

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