混凝土面板与堆石料接触面模型及其应用  

Constitutive model for interface between concrete slab and rockfill and its application

作　　者：傅中志[1,2] 王立安 陈锦祎 张意江 FU Zhongzhi;WANG Li'an;CHEN Jinyi;ZHANG Yijiang(Nanjing Hydraulic Research Institute,Nanjing 210024,China;Key Laboratory of Reservoir and Dam Safety,Ministry of Water Resources,Nanjing 210024,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]水利部水库大坝安全重点实验室,江苏南京210024

出　　处：《岩土工程学报》2024年第11期2305-2313,共9页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(52222906,U21A20158);国家重点研发计划项目(2021YFC3090101)。

摘　　要：混凝土面板是面板坝防渗安全的生命线,其应力变形特性主要取决于坝体堆石料的应力变形特性及面板与堆石料之间的接触特性。在面板坝的应力变形计算中,通常采用接触面模型模拟面板与堆石料之间的荷载传递机制,因此接触面模型是否合理,直接影响到面板应力变形计算结果的可靠性。分析了传统双曲线接触面模型存在的不足,提出了一个考虑双向剪切耦合效应,且符合强度准则和标架无差异原则的接触面本构模型,该模型参数少,数值实现方便,可以定性地模拟出实际面板坝工程中出现的混凝土挤压破坏区域。Concrete slabs play a crucial role in the seepage controlling system of concrete-faced dams.The stress and deformation behavior of concrete slabs mainly depends on the stress-strain properties of their supporting rockfill materials and the contact behavior of the interfaces between slabs and damming rockfill materials.The interface models are commonly used,in stress and deformation analyses of concrete-faced dams,to reflect the load-transferring mechanism between the concrete slabs and the rockfill materials.Therefore,the reliability of the calculated results depends on the rationality of the interface model used.In this study,the deficiency of the traditional hyperbolic interface model is shown,and a new interface model is proposed.The new model can consider the coupling effects between two shearing directions,and the requirements of shear strength criterion and frame-independence are satisfied.The model uses only a few parameters and is easy to implement in finite element analyses.It is shown by a case study that the compressive failure zones occur in real projects can be simulated by the proposed model,at least in a qualitative manner.

关 键 词：混凝土面板坝 接触面 本构模型 应力变形 

分 类 号：TV641[水利工程—水利水电工程]