摘要
横缝开合状态对高坝深孔结构力学行为有重要影响。建立了考虑不同横缝初始间隙及其开合行为影响的高坝深孔分析模型,分别从"结构变形、开裂状态、应力分布及实际配筋受力状态"4个角度,结合实际工程,获取了横缝开合状态影响下孔口结构的力学行为特征,弥补了传统高坝深孔结构分析中因简化横缝状态而造成的设计偏差。研究表明,横缝初始间隙越大,高坝深孔结构变形、开裂、应力及钢筋受力等力学行为特征越趋于不利状态,结构受力性能明显降低,正确描述横缝开合状态是分析深孔真实力学行为乃至合理配筋的重要保障。
Contraction joint opening and closing states greatly affect mechanical behavior characteristics of the deep orifice structures in high dams. Considering the effect of initial gap and its opening and closing states, a model for the analysis of deep orifices in high dam has been established, respectively. Through four aspects of structural deformation, cracking state, stress distribution and actual reinforcement stress, and combined with real projects, real mechanical behavior characteristics of orifice structures under the in fluence of contraction joint opening and closing state is obtained, making up design deviations caused by simplification of contraction joint state in traditional deep orifice design method. According to the results of this paper, the larger the initial gap is, the more adverse the mechanical behavior characteristics of deep orifices will be, and structure performance decreased obviously. Providing a correct description for contrac tion joint is an important safeguard for analyzing the real mechanical behavior and even reasonable reinforce ment of deep orifices.
出处
《水利学报》
EI
CSCD
北大核心
2013年第10期1249-1256,共8页
Journal of Hydraulic Engineering
基金
国家创新研究群体科学基金(51021004)
天津市应用基础与前沿技术研究计划(13JCYBJC19400)
水利工程仿真与安全国家重点实验室开放基金
关键词
重力坝
孔口
横缝
初始间隙
变形
开裂
钢筋应力
gravity dam
orifices
contraction joint
initial gap
deformation
crack
reinforcement stress
