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针对抗剪连接件剪力分布的不均匀程度缺少理论分析的现状,利用弹性变形理论,推导了多排抗剪连接件在竖向荷载作用下相对滑移和剪力分布的理论计算公式,并与有限元计算结果进行了验证。结果表明,钢板端部固定可以改善连接件的受力状态,且钢、混凝土受力分布也较为均匀;多排抗剪连接件刚度和间距越大剪力分布越不均匀。得到了竖向荷载作用下多排抗剪连接件的工作机理为:钢板竖向位移和荷载随深度递减,抗剪连接件剪力自上而下逐步发挥作用。且理论计算与有限元分析结果一致,表明该公式具有较好的准确性和便利性。
In view of the lack of theoretical analysis of the shear distribution of the shear connectors, the theoretical calculation formulas of the relative slip and shear distribution of the shear connectors are deduced based on the theory of elastic deformation The results of finite element calculation are validated. The results show that the fixed end of the steel plate can improve the stress state of the connector, and the stress distribution of the steel and concrete is also more uniform. The shear stress distribution of the multi-row shear connector is more uneven with the increase of the rigidity and spacing. Under the action of vertical load, the working mechanism of multi-row shear connectors is as follows: the vertical displacement of steel plate and the load decreases with the depth, and the shear force of shear connector gradually works from top to bottom. And the theoretical calculation and finite element analysis results are consistent, which shows that the formula has good accuracy and convenience.