接头刚度对装配式综合管廊受力性能的影响分析

Analysis of the Influence of Joint Stiffness on Mechanical Behavior of Precast Concrete Utility Tunnel

为分析不同装配方式下,管廊横向接头转动刚度对管廊结构受力性能的影响。分别采用刚度解析法和有限元数值模拟,对装配式综合管廊的叠合-现浇、预制-现浇、预制螺栓和预制张拉4种接头的抗弯刚度进行了计算,计算结果显示两种模型的计算结果存在一定差异,但都呈现了类似的变化规律,即当轴力一定,接头抗弯刚度K_(θ)随着弯矩的增大而逐渐减小;随着轴力的逐渐增大,接头抗弯刚度K_(θ)也逐渐增大,并最终趋于稳定。

In order to analyze the influence of joint stiffness on mechanical behavior of precast concrete utility tunnel.The flexural stiff‐ness of four kinds of joints of precast concrete utility tunnel:laminated-cast-in-place joint,precast-cast-in-place joint,precast bolt joint and prestressed joint,was calculated by analytical analysis and finite element numerical simulation.The results show that there are some differenc‐es between the two models,but they all show similar changes law:the bending stiffness decreases with the increase of bending moment when the axial force is constant.With the increase of axial force,the joint bending stiffness also increases,and eventually stabilize.