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剪力件是组合梁桥中钢腹板和混凝土上下翼缘板连接的关键构造,研究开孔波折板剪力件的力学性能是该种连接件设计的关键环节。通过38个开孔波折板剪力件试件及8个开孔板(PBL)剪力件对比试件的静载推出试验,研究考虑不同参数影响的开孔波折板剪力件静载作用下的受力性能,并给出开孔波折板剪力件屈服承载力及极限承载力计算公式。研究结果表明:开孔波折板剪力件推出试验过程可以划分为外荷载达到屈服承载力之前的线性阶段、荷载由屈服承载力增加到极限承载力的塑性阶段以及破坏阶段;影响开孔波折板剪力件抗剪承载能力的主要参数为混凝土强度等级、开孔孔径、贯穿钢筋面积、开孔板厚度等。同等条件下,开孔波折板剪力件抗剪承载力比PBL剪力件提高约1.5倍;给出的计算公式物理意义明确,其计算结果与本文试验结果吻合较好,可用于开孔波折板剪力件的设计计算。
The shear component is the key structure in the connection between the steel web and the concrete upper and lower flange plates in the composite beam bridge. Studying the mechanical properties of the open-hole wave plate shear component is the key link in the design of this kind of connector. Static load test of 38 specimens with open-cell corrugated plates and 8 specimens with open-hole plates (PBL) was carried out. The effects of different parameters on the static load distribution of open-ended corrugated plate shear members were studied. The formulas of yield strength and ultimate bearing capacity are given. The results show that the test of open-ended wave plate shear force can be divided into the linear phase before the external load reaches the yield capacity, the plastic deformation stage and the failure phase when the load increases from the yielding capacity to the ultimate bearing capacity, The main parameters of shear capacity of shear strength of concrete strength level, opening aperture, through the reinforcement area, the thickness of perforated plate. Under the same conditions, the shearing strength of open-ended corrugated plate shear members is about 1.5 times higher than that of PBL shear members. The calculation formula given is clear in physical meaning. The calculated results are in good agreement with the experimental results and can be used in open- Design and Calculation of Sheet Shear.