水压和变形下嵌缝材料设计及黏接层破坏机理研究

发布时间：2018-04-30 12:50

本文选题：内聚力模型 + 界面剥离　；参考：《水利学报》2017年07期

【摘要】：水工建筑物伸缩缝的破坏及渗漏问题会直接影响水工结构自身的安全稳定。本文基于南水北调穿黄隧洞工程实际背景,引入基于内聚力(Cohesive Zone Model)单元界面破坏有限元模型,进行了伸缩缝嵌缝材料在背水压作用下的仿真分析,并将其结果与室内压水试验的应变-荷载数据进行对比,给出了适合于聚脲基复合防渗体系嵌缝内聚力单元的断裂能。同时,分析计算了伸缩缝宽度及嵌缝深度对结构抵抗水压能力的影响,证明所取参数的正确性。进一步分析了伸缩缝变形和水压力作用条件下的仿真结果,给出了伸缩缝变形、伸缩缝宽度、嵌缝深度及承载能力之间的关系。本文结果可为伸缩缝的结构设计提供指导。
[Abstract]:The damage and leakage of expansion joints of hydraulic structures will directly affect the safety and stability of hydraulic structures themselves. Based on the actual background of the Yellow River Tunnel Project of South-to-North Water diversion Project, the finite element model of interface failure based on cohesive Zone Model is introduced, and the simulation analysis of the expansion joint material under the back water pressure is carried out. The results are compared with the strain-load data of water pressure test in laboratory, and the fracture energy suitable for the intercalation cohesion unit of polyurethane-based composite impervious system is given. At the same time, the influence of the width and depth of the expansion joint on the water pressure resistance of the structure is analyzed and calculated, and the correctness of the parameters is proved. The simulation results under the condition of expansion joint deformation and water pressure are analyzed, and the relationships among expansion joint deformation, expansion joint width, joint depth and bearing capacity are given. The results of this paper can provide guidance for the structural design of expansion joints.
【作者单位】：中国水利水电科学研究院结构材料研究所;曼彻斯特大学数学系;北京化工大学理学院;
【基金】：水利部公益性行业专项经费项目(201501036)
【分类号】：TV44

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