预制预应力综合管廊接头设计计算方法研究

摘要

In view of the construction of a precast prestressed municipal tunnel（PPMT） in the 2010 Shanghai Expo,a calculation method,to simulate the bending stiffness and the flexural capacity of PPMT joint, is proposed based on the internal force equilibrium and the deformation compatibility.The elongation of the prestressing tendons and the elastic modules change of the hydroswelling rubber-sealings are taken into consideration in the calculation method.The accuracy of the calculation method is shown by the experimental results.The results of this work has been applied in the PPMT in the 2010 Shanghai Expo.%以2010年上海世博会园区预制预应力综合管廊工程为背景, 基于内力平衡和变形协调条件, 并考虑接头拼缝变形形态、预应力筋伸长和遇水膨胀橡胶条弹性模量的影响, 提出了包含抗弯刚度计算模型和抗弯承载力计算模型的采用预应力筋连接的预制预应力综合管廊接头设计计算方法. 与现有试验结果的对比分析表明, 该方法的计算结果与试验结果吻合良好. 该文的主要研究成果已成功应用于2010年上海世博会园区预制预应力综合管廊工程.