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作为桥梁和建筑结构面板的超轻质混凝土的钢-混凝土-钢(SCS)夹层面板更为轻薄。这种超轻质夹层面板的特点之一就是使用3个钩形连接件来提升针对垂直剪切和截面弯矩共同作用的结构性能。这种钩形连接件有效地将钢与混凝土连接在一起,防止表面钢板发生局部屈曲和分离,并提高了结构的横向抗剪能力。对79个不同填充材料(普通混凝土、轻质混凝土和超轻质混凝土)的夹层面板试件进行拉力测试,从而研究这种新型钩形连接件的抗拉承载力。介绍这些试件的极限抗拉承载力和相应的失效模式,讨论并分析影响钩形连接件抗拉承载力的主要参数,提出可以预测钩形连接件抗拉承载力的理论方法,其准确度通过了试验结果的验证。最后,给出可用于设计的建议方法。
Steel-concrete-steel (SCS) sandwich panels for ultra-light concrete bridges and building structural panels are thinner and lighter. One of the hallmarks of this ultra-lightweight sandwich panel is the use of three hook connectors to enhance structural performance for both vertical shear and cross-sectional bending. This hook-type connection effectively joins the steel to the concrete to prevent local buckling and separation of the surface steel and enhances the transverse shear resistance of the structure. Tensile tests were carried out on 79 specimens of sandwich panels with different filling materials (normal concrete, lightweight concrete and ultra-lightweight concrete) to investigate the tensile load-bearing capacity of this new type of hook-type joint. The ultimate tensile load capacity and corresponding failure mode of these specimens are introduced. The main parameters that affect the tensile strength of the hooked part are discussed and analyzed. The theoretical method of predicting the tensile load capacity of the hooked part is proposed. The accuracy Passed the test results of the test. Finally, give suggestions for the design.