摘要:新、老混凝土弹性模量相差大、贴坡厚度小、受外界环境影响显著以及温控措施要求严的特点,温度变化引起的混凝土变形受到老混凝土的约束,会产生较大的温度应力,对坝体应力和结合面应力产生较大的影响。利用有限元仿真在拟定的温控措施条件下的温度、温度应力以及坝体应力,从而提出较合理的温控措施。
关键词:加高工程;温度控制;有限元法;仿真
中图分类号:TV52 文献标识码:B 文章编号:1672-1683(2008)01-0105-05
Temperature Control Measures on Heightening Project of Danjiangkou Dam
YANG Xue-hong,DING Fu-zhen,JIAN Xing-chang
(Changjiang Water Resources Committee Changjiang Institute of Survey,Planner,Design and Research,Wuhan,430010,China)
Abstract:Modulus of elasticity for the new concrete is widely different to the old,and thickness of jointed concrete is relatively thin.Hence it''s temperature is effected markedly by ambient circumstances so that temperature control measures are very strict.Old concrete restricts strain of new concrete due to change of temperature.All of those factors make more thermal stresses,which influenced the stress of dam and joint parts.With the help of FEM simulation,temperature field,thermal stress and stress of dam can be simulated,Given temperature control measures are reasonable and feasible.
Key words:heightening project;temperature control;finite element method;simulation
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作者简介:杨学红(1972-)男,湖北潜江人,硕士,主要从事施工仿真、温度控制和施工组织设计方面的研究。
来源:《南水北调与水利科技》2008年第1期 |