白鹤滩水电站反拱型底板非线性静力分析  

Nonlinear stability analysis of the counter-arched slab for Baihetan hydropower project

作　　者：何小敏[1] 杨敏[1] 董天松[1] 刘鹏[2] 李琳[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072 [2]中国水电顾问集团西北勘测设计研究院,陕西西安710065

出　　处：《水资源与水工程学报》2013年第1期40-44,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金面上项目资助(51179119)

摘　　要：基于非线性接触理论,结合有限元分析方法对弦长达到130 m、分块较多的反拱底板水垫塘进行敏感性分析,研究正向荷载作用下不同锚固水平和方式、反拱曲率及键槽对反拱水垫塘稳定性的影响。并得出以下结论:锚筋对反拱形底板的整体稳定起关键性作用;均布荷载作用下锚筋均匀分布最利于整体稳定,中间板块不锚固是可以选择的利于成拱的方式;对于弦长达130 m的反拱水垫塘,反拱圆心角74°左右较合理;键槽对局部稳定性有明显提高。Based on the nonlinear contact theory,combined with finite element analysis method,this paper made sensitivity analysis of counter-arched slab whose chord length is 130 m and which has more than 9 blocks.It also studied the influence on the stability of the counter-arched slab under different anchor level and way,different reverse arch curvature and key groove.And it draw the following conclusion that anchor bar plays key role in counter-arched slab＇s overall stability;uniform anchor bar distribution is the most suitable way for the overall stability and intermediate plate without anchor bar can be selected as a good way;for reverse-arch-shaped water cushion pond whose chord length up to 130 m,the arch central angle about 74° is reasonable;the local stability has increased significantly by the influence of key groove.

关 键 词：水垫塘 反拱形底板 稳定性 非线性 锚固 反拱曲率 键槽 

分 类 号：TV314[水利工程—水工结构工程]