Research on performance of prefabricated bridge joint

Abstract

Abstract In this paper, the influence of different parameters such as joint form, joint stiffness and shear key form on the mechanical properties of the joint was analyzed based on an asymmetric simply supported-continuous box girder. The finite element analysis model of the bridge was established by the finite element software MIDAS CIVIL 2017, and the mechanical properties of the whole bridge were analyzed. Based on the general finite element software ABAQUS 2017, the local solid finite element models of the four types of joints, such as C50 concrete wet joint, C80 concrete wet joint, dense key prefabricated assembly joint and sparse key prefabricated assembly joint, were established to study the mechanical properties and feasibility. The results show that the cracking moments of the four types of joints are more than twice of the negative moment of the middle fulcrum section under the most unfavorable state, which meet the requirement of the service performance. The breaking moments of the four types of joints are more than three times of the negative moment of the middle fulcrum section under the most unfavorable state, which meet the requirement of the carrying capacity.