Experimental and Simulation Study on the Stress Characteristics of Precast U-Shaped Beam Slab of Prestressed Concrete for High-Speed Railways

Abstract

AbstractThe precast U-shaped beam slab of prestressed concrete is a crucial structural form in railway bridge construction, with its stress characteristics directly affecting the safety and stability of railway bridges. This study examines the stress characteristics of the slab track, including transverse bending, shear lag effects, and the stress state at the junction between the web and the bottom slab. It selects precast U-beams from actual field projects to investigate the transverse bending performance, shear lag effects, and stress conditions at the junctions through experimental studies. Additionally, by integrating the results of linear and nonlinear finite element analysis, it summarizes the stress characteristics of precast U-shaped beam slabs made of prestressed concrete. This provides references for the design and construction of precast U-shaped beam slabs of prestressed concrete.