论文部分内容阅读
有格室-后承压板构造是目前混合梁桥工程中广泛应用的钢混结合部构造形式之一。针对混合梁斜拉桥,通过有限元方法,对该类型结合部构造的受力特点及各结构参数影响进行了较系统的研究。研究结果表明:后承压板和加强段顶底板上的抗剪连接件是有格室-后承压板结合部荷载传递的主要部件,格室内抗剪连接件作用不大。在所取的参数范围内,后承压板厚度(20mm―70mm)、格室长度(0.6m―2.0m)的影响很小;加强段长度大等于1.5m后,该参数的影响也可忽略;抗剪连接件刚度和格室高度对该类型结合部构造的受力性能影响很大,是设计过程中需重点考虑的问题。该研究对混合梁桥结合部构造的设计和研究有重要参考意义。
A grid room - after the pressure plate structure is currently used in mixed beam bridge project widely used steel structure with one of the joints. For the hybrid cable-stayed bridge, through the finite element method, the force characteristics of the structure of the joint and the influence of each structural parameter are systematically studied. The results show that the shear connectors on the back pressure plate and the top and bottom of the reinforced section are the main components of the load transfer of the cell-back pressure plate joint, and the shear connectors in the cell room have little effect. The influence of the thickness of bearing plate (20mm-70mm) and the cell length (0.6m-2.0m) is small in the range of parameters taken. The effect of this parameter is negligible when the length of reinforcing section is equal to 1.5m ; The stiffness of the shear connector and the cell height have a great influence on the mechanical performance of this type of joint, which is a key issue in the design process. The research has important reference meaning for the design and research of the joint structure of hybrid beam bridge.