非整体拱坝结构分析研究  

Study on non-integrity of arch dams

作　　者：李雪春[1] 陈重华[1] 徐昕[1] 

机构地区：[1]中国水利水电科学研究院结构材料所,北京100038

出　　处：《水利学报》2002年第6期47-52,共6页Journal of Hydraulic Engineering

摘　　要：本文介绍了二种不同的接缝模型 ,并用以模拟拱坝横缝 ,进行了非整体拱坝有限元分析 .分析结果表明 :计算中考虑分期施工 ,对拱坝应力有明显影响 ;拱坝中的横缝虽经压力灌浆并设置键槽 ,仍有可能拉裂或剪坏 ,引起坝体内应力重分布 ,从而改变拱坝整体应力状态 ,同时横缝的影响与坝体的厚度和气候条件有关 ,因此应进行非整体拱坝的非线性分析 .文中还分析了灌浆质量对坝体应力的影响 ,计算结果表明 ,只要浆体灌进了接缝 ,浆体质量对坝体应力和变形的影响是很小的 .本文最后还对二种不同的接缝模型进行了比较 ,二者计算结果基本相同 .Two kinds of joint for modeling the transverse joint in FEM analysis on non integrity of arch dam are introduced. The study shows that: the stress distribution of arch dam will be significantly changed in different stages of construction; the transverse joints will be failured even though the joint key groove is established and grouted under pressure, forming the re distribution of stress in the dam; the effect of transverse joint is closely related to dam thickness and climate condition. Consequently, it is necessary to carry out the non linear analysis of the dam. The study also shows that the grouting quality has minor effect on the stress and deformation of the dam.

关 键 词：非整体拱坝 横缝 键槽 灌浆 有限元法 

分 类 号：TV642.4[水利工程—水利水电工程]