作　　者： (彭真）; (何庆锋）;

机构地区： 湖南大学土木工程学院,长沙410082

出　　处： 《中国科技论文》 2017年第13期1445-1451,共7页

摘　　要： 为研究多舱综合管廊破坏机制、承载力和变形能力等受力特性,以某地下综合管廊工程为原型,完成多舱综合管廊节段足尺试验。试验结果表明:试件经历了开裂、刚度退化和极限破坏3个阶段;初始裂缝出现在长跨跨中板底;裂缝主要分布在长跨跨中板底以及板端支座处;试件破坏模式为顶板斜拉破坏;荷载达到荷载准永久值时,裂缝宽度和挠度均没有超过限值,满足正常使用极限状态要求;试件的极限承载力达到设计荷载值的2.37倍,满足承载能力极限状态要求。 In order to study the failure mechanism, bearing capacity and deformability of the municipal tunnel, a full-scale multi-cellular municipal tunnel section model was tested based on practical engineering. The test results showed that the specimen expe-riences three stages of cracking, stiffness degeneration and ultimate failure. The initial cracks appear in the long span across the bottom plate and the cracks are mainly distributed in the long span across the bottom plate and the plate end bearing. The failure mode of specimen is diagonal tension failure. When the load on the specimen reaches the quasi-permanent load, the crack width and deflection have no super limited value, which can meet the requirement of the serviceability limit state. The ultimate bearing capacity of the specimen reaches 2. 37 times of the design load value, and it can meet the requirement of ultimate limit state.

关 键 词： 多舱综合管廊 足尺静力试验 承载力 变形能力 裂缝