考虑抗剪连接键影响的波纹钢-钢筋混凝土组合拱静力性能研究

Corrugated steel-concrete (CSC) composite arch is a composite with good corrosion resistance, high stiffness and simple construction, which is suitable for a variety of structures such as comprehensive pipeline corridors, bridges and tunnels. To study the effect of shear connector on their static properties, two CSC arches with shear connectors interval of 100 mm and 400 mm were designed. The influences of shear connectors interval on damage modes, composite effect, bearing capacity and stiffness were analyzed. Simultaneously, a finite element analytical model for the static performance of CSC arches was established and verified and a parametric analysis was conducted. The results indicate that shear connectors interval significantly affect the bearing capacity and stiffness of the CSC arches. When the interval increases from 100 mm to 400 mm, the bearing capacity decreases by 33. 1%, and the stiffness decreases by 17. 7% . The effect of shear connectors on the static performance of the CSC arches is coupled with the thickness of corrugated steel. The interval of the shear connectors in the transverse direction of the arch cross-section has a greater influence on the static performance than its spacing along the arch axis. Finally, based on these results, it is recommended to prioritize the horizontal arrangement of shear connectors while meeting the requirements for vertical shear connector construction.