渐变段钢衬结构与围岩联合承载优化设计  

Optimization Design of Interaction between Steel Transition and Surrounding Rock

作　　者：汪剑国 伍鹤皋[1] 石长征[1] 苏凯[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《水力发电》2015年第12期44-47,共4页Water Power

基　　金：国家自然科学基金资助项目(51179141)

摘　　要：以某国外水电站进水口钢衬方变圆渐变段为研究对象,采用三维有限元法分别计算了渐变段在正常运行工况和放空检修工况下的应力和位移。渐变段钢衬单独承载和渐变段加劲环翼缘与围岩联合承载的计算结果对比表明,围岩可有效缓解管壳和加劲环的应力集中。采用联合承载设计可优化渐变段体形,减小加劲环截面的高度。建议在以后的渐变段结构设计中,加劲环增设翼缘,并适当考虑围岩联合承载。The three-dimensional finite element method is adopted to analyze the stress and displacement of steel transition located on water intake of a foreign hydroelectric project under normal operation and venting and repairing operation. Compared with the results of the steel transition bearing alone, the result according to the prineiple of interaction between stiftener flange and surrounding rock indicates that the surrounding rock can efl＇iciently relax the stress concentration of shell and stiffener. The height of stiffener can be decreased under the interaction principle which can optimize the shape of steel transition. It is suggested that the flange should be added on the stiffener and the interaction principle should be more considered appropriately in the design of steel transition later.

关 键 词：水工结构 渐变段钢衬 围岩联合承载 加劲环 体形优化 

分 类 号：TV314[水利工程—水工结构工程]