有挤压墙面板堆石坝的面板温度应力分析及改善措施研究  

THE ANALYSIS AND AMENDATORY MEASURES OF TEMPERATURE STRESS OF FACE SLAB OF A CONCRETE-FACED ROCKFILL DAM WITH EXTRUSION WALL

作　　者：程嵩[1] 张嘎[1] 张建民[1] 侯文峻[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《工程力学》2011年第4期76-81,共6页Engineering Mechanics

基　　金：973课题项目(2007CB714108);国家自然科学基金项目(50778105)

摘　　要：该文在综合考虑挤压式边墙、面板、坝体相互作用的基础上开发了面板堆石坝面板温度应力的数值模拟方法并验证了其合理有效性,然后重点分析了挤压式边墙这种结构对于面板堆石坝面板温度应力的影响规律。分别采用沈珠江双屈服面弹塑性模型和清华弹塑性损伤模型描述堆石料和土与结构接触面,结合三维有限元分析方法计算了设置挤压式边墙以及面板与挤压墙之间采用不同填料时面板的温度应力。在此基础之上,从挤压墙与面板接触面的角度,提出了减小面板温度应力的措施,并进行了计算论证。结果表明:挤压式边墙对于面板温度应力会产生不利的影响;面板与挤压墙之间的不同填料对面板温度应力有一定的影响;面板与挤压墙之间设置沥青油毡等填料有利于减小面板的温度应力。The interaction between the extrusion wall and face slab and a dam body itself is considered to develop a numerical method for the temperature stress of the face slab of CFRD and verify its rationality.The influence of the extrusion wall on the temperature wall of the face slab is then emphatically analyzed.The behaviors of the rockfill and soil-structure interface were described by Shen＇s two-yield surfaces model and Tsinghua＇s elasto-plasticity damage model,respectively.The 3D FEM analysis shows the temperature stress of the face slab with an extrusion wall and different filling materials between the face slab and extrusion wall.The method of decreasing the temperature stress of the face slab is brought forward and verified from the point of view of the interface between the extrusion wall and face slab.The results show that the extrusion wall have a negative effect on the temperature stress of the face slab.Different filling materials have rather different effects on the temperature stress.The filling materials like asphalt felt can decrease the temperature stress of the face slab.

关 键 词：水工结构工程 面板堆石坝 数值模拟 挤压式边墙 温度应力 改善措施 

分 类 号：TV315[水利工程—水工结构工程] TV641.4