波纹钢-混凝土组合构件钢筋连接件受剪性能试验研究

To investigate the shear performance of tie-bar connectors in corrugated steel-concrete composite panels, six push-out specimens were tested. The study examined the effects of the placement location (crest or trough) and spacing of the tie-bar connectors on their failure modes, load-slip characteristics, and shear capacity. The results reveal that all push-out specimens exhibit the same failure mode, characterized by shear fracture at the root of the tie-bar connectors. However, the failure patterns vary for specimens with connectors placed at different locations. For connectors positioned at the crest, the failure surface is primarily characterized by shear-slip behavior, whereas connectors at the trough exhibit not only shear-slip surfaces but also a degree of necking phenomenon. Compared to the trough location, the tie-bar connectors at the crest position exhibit an increase of 8. 6% in shear capacity and 231% in shear stiffness. Nonetheless, the connectors at the trough location display 43. 0% higher slip displacement at failure. Based on the experimental data, an empirical predictive model for the interface shear force-slip relationship of corrugated steel-concrete composite panels was developed using a modified Ollgaard formulation. The shear capacity of the tie-bar connectors was calculated using the ANSI / AISC 360 provision, while the shear stiffness was computed using the secant modulus corresponding to 60% of the maximum shear force. The predicted results show a good agreement with the experimental observations.