Effects of center-to-center pitch of grouped studs on shear force transfer and deck separation of simply-supported steel-concrete composite bridges

Wei Wang, Jun Wang, Xiuyuan Zeng, Huicong Xiang and Wei Ji

Abstract

The center-to-center pitch (CCP) of shear connectors is specified to not exceed 0.61m in the AASHTO LRFD bridge design specifications to guarantee full composite action between steel girder and concrete deck. However, larger CCP of grouped shear connectors is in need in accelerated bridge construction to enhance efficiency and lower cost. In this study, the effects of CCP of grouped headed studs on shear force transfer and deck separation of simply-supported steel-concrete composite bridges were quantitatively investigated based on the refined finite element method. A typical simply-supported steel concrete composite bridge was designed based on the AASHTO LRFD code and modeled with the ANSYS. The accuracy of modeling skill was validated with published data. The HL-93 loading and fatigue design truck specified in the AASHTO LRFD code were adopted as design loading. The effects of three important parameters, including the diameter of headed studs, the CCP of grouped headed studs, and the arrangement of headed studs, on the shear force transfer and deck separation between steel girder and concrete deck were investigated. Results show that the three considered parameters have a coupling effect on the fatigue limit state and strength limit state of the bridge.

Key Words

center-to-center pitch of grouped headed studs; deck separation; refined finite element method; shear force transfer

Address

Wei Wang:1)Key Laboratory for Damage Diagnosis of Engineering Structures of Hunan Province, Hunan University, Changsha, Hunan 410082, China 2)College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China Jun Wang:College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China Xiuyuan Zeng:College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China Huicong Xiang:College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China Wei Ji:1)Key Laboratory for Damage Diagnosis of Engineering Structures of Hunan Province, Hunan University, Changsha, Hunan 410082, China 2)College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China

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