多种软件协作背景下的高拱坝结构特性及安全度评价  

Evaluation of Structure Characteristic and Safety Degree of High Arch Dam under Multiple Software Cooperation

作　　者：李季琼[1,2,3] 宋鹏[1,2,3] 张伟 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学水资源高效利用与工程安全国家工程研究中心,江苏南京210098 [3]河海大学水利水电学院,江苏南京210098 [4]扬州市水利局,江苏扬州225009

出　　处：《水电能源科学》2013年第7期51-54,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(51079046);江苏省"333高层次人才培养工程"基金资助项目(2107-B08037);江苏高校优势学科建设工程基金资助项目(YS11001)

摘　　要：针对锦屏一级高拱坝地质构造复杂、两岸基础刚度及坝体体型不对称问题,利用AutoCAD和HyperMesh联合进行三维地质建模,应用Marc软件对拱坝基础系统进行三维弹塑性有限元分析得到加固前后坝体的位移场和应力场,并采用基于位移突变的强度折减法评估拱坝基础系统的整体安全度。结果表明,锦屏高拱坝的位移和应力分布符合拱坝受力的一般规律,位移和应力呈现较明显的左右不对称分布,对左岸f5、f8断层进行加固处理可改善位移和应力的不对称分布状况,综合分析位移突变点及位移变化速率突变点,认为锦屏拱坝基础系统的整体强度储备安全度约为2.5。Aiming at the complex geological structure, asymmetric stiffness of two banks of foundation and asymmetry of dam shape of Jinping first-stage high arch dam, three-dimensional geological model is established by using Auto- CAD and HyperMesh. And then three-dimensional elastic plastic finite element analysis is applied to dam foundation system with Marc. The displacement field and stress field of the dam before and after reinforcement is obtained. Finally, the global safety degree of the dam foundation system is evaluated by using strength reduction method based on displacement sudden change. The results show that the displacement and stress distribution of Jinping high arch dam accord with gen eral law l the displacement and stress are apparently asymmetric for the left and the right banks l the asymmetric distribu t/on of displacement and stress can be improved by reinforcing treatment on the faults fs and fs of the left bank; according to comprehensive analysis of displacement catastrophe point and the catastrophe point of the change rate of displacement, the global strength reserve safety degree of Jinping dam foundation system is about 2.5.

关 键 词：多种软件协作 弹塑性有限元 位移场 应力场 位移突变 整体安全度 

分 类 号：TV642.4[水利工程—水利水电工程]