埋藏式月牙肋钢岔管应力控制标准的比较研究  

Comparison on Different Stress Control Standards of Embedded Steel Crescent-rib Reinforced Bifurcation

作　　者：周彩荣[1] 伍鹤皋[1] 石长征[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》2014年第4期54-57,共4页Water Power

基　　金：中国博士后科学基金(2013M542058)

摘　　要：通过三维有限元结构分析,对目前常用的几种钢岔管应力控制标准进行了比较研究。在相同围岩参数及缝隙条件下,按不同应力控制标准设计的钢岔管管壁厚度和肋板尺寸差别较大,说明不同应力控制标准之间差别是较大的。此外,在满足明管校核准则和适当围岩承载比的条件下,按DL/T 5141—2001《水电站压力钢管设计规范》坝内埋管的结构系数增加10%的应力控制标准对地下埋藏式钢岔管进行设计是比较合理的。A comparison among several common stress control standards of steel bifurcation is conducted by 3-D FEM. The comparison shows that there is a great difference among the designs of pipe thickness and rib dimension under the same surrounding rock and geological gap condition when the designs are carried out according to different stress control standards, which further illustrates the large difference between different stress control standards. In addition, if the stress checking guide line for exposed steel bifurcation is satisfied and the load--carrying proportion of surrounding rock is controlled in appropriate range, the design of embedded steel bifurcation will be reasonable when the structural coefficient is defined as the 110% of the structural coefficient of embedded penstock within dam prescribed in DI/F 5141-2001 ＂Hydropower Penstock Design Specifications＂ .

关 键 词：水工结构 埋藏式月牙肋钢岔管 应力控制标准 管壁厚度 三维有限元法 

分 类 号：TV732.4[水利工程—水利水电工程]