Simulation algorithm for spiral case structure in hydropower station  

作　　者：Xin-yong XU Zhen-yue MA Hong-zhan ZHANG 

机构地区：[1]Faculty of Infrastructure Engineering, Dalian University of Technology [2]School of Hydraulic Engineering, North China University of Water Resources and Electric Power

出　　处：《Water Science and Engineering》2013年第2期230-240,共11页水科学与水工程（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 51079020);the He'nan Provincial Research Foundation for Basic and Advanced Technology (Grant No. 122300410001);the Foundation of He'nan Educational Committee (Grant No. 13A570715)

摘　　要：In this study, the damage-plasticity model for concrete that was verified by the model experiment was used to calculate the damage to a spiral case structure based on the damage mechanics theory. The concrete structure surrounding the spiral case was simulated with a three-dimensional finite element model. Then, the distribution and evolution of the structural damage were studied. Based on investigation of the change of gap openings between the steel liner and concrete structure, the impact of the non-uniform variation of gaps on the load-beating ratio between the steel liner and concrete structure was analyzed. The comparison of calculated results of the simplified and simulation algorithms shows that the simulation algorithm is a feasible option for the calculation of spiral case structures. In addition, the shell-spring model was introduced for optimization analysis, and the results were reasonable.In this study, the damage-plasticity model for concrete that was verified by the model experiment was used to calculate the damage to a spiral case structure based on the damage mechanics theory. The concrete structure surrounding the spiral case was simulated with a three-dimensional finite element model. Then, the distribution and evolution of the structural damage were studied. Based on investigation of the change of gap openings between the steel liner and concrete structure, the impact of the non-uniform variation of gaps on the load-beating ratio between the steel liner and concrete structure was analyzed. The comparison of calculated results of the simplified and simulation algorithms shows that the simulation algorithm is a feasible option for the calculation of spiral case structures. In addition, the shell-spring model was introduced for optimization analysis, and the results were reasonable.

关 键 词：hydraulic structure simulation ＂ concrete damage-plasticity model ＂ shell-springmodel spiral ease 

分 类 号：TV33[水利工程—水工结构工程]