L型出筋连接叠合板式拼装综合管廊整体结构受力性能分析

Study on the Mechanical Properties of Precast Utility Tunnel Composed of Composite Slabs Using L-Shaped Reinforcement Connection

基于ABAQUS软件,并考虑叠合界面的影响,建立了采用L型出筋连接构造的叠合板式拼装综合管廊整体结构有限元分析模型。与试验结果的对比分析表明,该有限元分析模型的计算结果与试验结果吻合较好。在此基础上,开展了叠合板式拼装综合管廊整体结构受力性能的有限元参数分析,主要分析参数包括轴压比、腋角位置、腋角高度等。结果表明,侧壁轴压比不超过0.2时,结构的承载力随着轴压力的增大而增大;将腋角设置在下部节点比设置在上部节点更有助于提高结构的承载力和刚度;腋角高度对结构承载力影响较大,腋角高度取壁板厚度的1/2较为合理。

In this paper,using the ABAQUS software and considering the influence of the composite material interface,a finite element analysis model of a precast utility tunnel composed of composite slabs using L-shaped reinforcement connection was established.The calculation results of the finite element analysis model are compared with the test results,and they are in good agreement.Then,on this basis,a finite element analysis of parameters including axial compression ratio,haunch position,and haunch height was performed.The results show that when the sidewall axial compression ratio does not exceed 0.2,the bearing capacity of the structure increases with the increase of axial pressure;Setting the haunch at the lower joints is more helpful to improve the bearing capacity and stiffness of the overall structure than setting it at the upper joints.The haunch height has a greater influence on the bearing capacity of the structure,and it is reasonable to take the haunch height to 1/2 of the thickness of the sidewall.