三峡水电站钢蜗壳外围混凝土损伤分析

将损伤力学引入三峡水电站钢蜗壳外围混凝土的非线性计算，研究混凝土由微观到宏观开裂的演变规律，为结构的损伤评估和配筋设计提供重要的参考。采用编制的正交异性三维损伤有限元程序对蜗壳结构进行损伤计算，细致地分析了钢蜗壳不同内水压力时，其外围混凝土的损伤分布规律及应力应变情况。结果表明:三峡水电站蜗壳结构具有较高的安全储备，结构设计合理。

Concrete Damage Analysis of the Spiral Case Structure of Three Gorges Power Station

In the nonlinear computation of the spiral case structure of rFnree Gorge Power Station, damage mechanics is introduced to study the concrete cracks from microcosmic to macrocosmic scope. This can put forward significant reference to structural reinforcement design and damage detection. In this paper, with the new three-dimensional orthogonal damage finite element program, the damage distribution, stress and strain of the spiral ease structure are fully analyzed in the conditions of different internal pressures. Acconting to the result, it can be concluded that the structure has high safety stock and its design is rational.