摘要
结合土石坝填筑蓄水算例,讨论土石坝混凝土防渗墙与基岩、填料之间的相互作用问题.通过计算比较不设置接触面,设置Goodman无厚度接触面、薄层单元接触面、薄层单元接触面且考虑应力路径4种工况下混凝土防渗墙受力变形特性.研究结果表明:防渗墙两侧接触面单元的设置以及计算模型的选用对墙体的受力变形特性影响明显;设置薄层单元接触面在一定程度上可以模拟墙体两侧泥皮,与实际更加吻合;采用考虑加载路径接触面模型能更加合理的反映实际工程中接触面的受力特性.
Based on the numerical example of earth-rock dam filling and water storage,the problem of interaction between cut-off wall and bedrock（or falling material） is discussed.The stress-strain characteristics of concrete cut-off wall under four conditions,which include no interface element,Goodman element,thin-layer element,and thin-layer element with the interface model when considering the loading stress path,are compared.Research shows that the interface element setting and its model choice have significant effect on the stress-strain characteristics of cut-off wall.Setting thin-layer element can simulate the mud cake beside the cut-off wall to some extent and be more close to the actual situation.Considering the loading stress path,interface model can reasonably reflect the interface mechanical characteristics.
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2011年第4期320-325,共6页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
国家自然科学基金委员会
二滩水电开发有限责任公司雅砻江水电开发联合研究基金重点项目(50639050)
江苏科技大学引进人才科研启动基金资助项目(35280902)
关键词
防渗墙
接触面模型
应力变形特性
cut-off wall
interface model
stress-strain characteristics
