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Design of Stud Shear Connectors in Composite Steel Bridges

项目名称：	Design of Stud Shear Connectors in Composite Steel Bridges
摘要：	For composite steel girder bridges, stud shear connectors are provided along the length of a bridge at the interface between the concrete deck and the steel girder to resist the interface shear and prevent slip of the concrete deck on the top flange of the girder. Currently, bridge engineers use the AASHTO LRFD Bridge Design Specifications (BDS) to determine the size and spacing of the stud shear connectors to satisfy the fatigue and strength limit states. Section 6 of the AASHTO LRFD BDS only allows the horizontal shear force between a concrete deck and steel girder to be transferred through the shear connectors. However, field studies on steel girder bridges designed as noncomposite have indicated that some level of unintended composite action is present despite having no stud shear connectors. Quantifying a reliable contribution of friction and cohesion in transferring the horizontal shear force between a concrete deck and the top flange of a steel member could result in a dramatic improvement on the calculation of the demand and resistance of stud shear connectors at the strength and fatigue limit states. Reducing the number of required stud shear connectors without compromising the performance of composite steel girder bridges will also increase the efficiency of fabrication and erection as well as decrease the number of tripping hazards during construction. Bridge engineers need guidance on updating the current AASHTO LRFD BDS design of stud shear connectors in composite steel girder bridges. The objectives of this research are to provide (1) guidance on calculating the demand and resistance on stud shear connectors for steel girder bridges (including straight, skewed, and horizontally curved) at the fatigue and strength limit states and (2) design examples.
状态：	Active
资金：	800000
资助组织：	National Cooperative Highway Research Program；Federal Highway Administration；American Association of State Highway and Transportation Officials (AASHTO)
项目负责人：	Abu-Hawash, Ahmad
执行机构：	University of Arkansas, Little Rock
主要研究人员：	Prinz, Gary S
开始时间：	20220804
主题领域：	Bridges and other structures；Construction；Design；Highways