大体积混凝土温度场及温度应力的数值模拟

Numerical simulation of temperature field and temperature stress of mass concrete based on ANSYS

推导了数值模拟温度场计算理论、四种边界条件、生热率表达式以及温度应力的计算原理,利用ANSYS模拟了同种相变材料的不同配比下混凝土的温度场和应力场。结果表明,随着混凝土中相变材料掺量的增加,相变混凝土的温度变化幅度逐渐减小,这证明了相变材料抑制混凝土开裂的有效性,为大体积混凝土结构抗裂提供了一个新的优化方案。

This paper derives the calculation theory of temperature field,four boundary conditions,expression of heat generation rate and calculation principle of temperature stress in the process of numerical simulation,and uses ANSYS to simulate the temperature field and stress field of concrete mixed with different phase change materials.The results show that with the increase in the amount of phase change material in concrete,the temperature change range of phase change concrete gradually decreases,which proves the effectiveness of phase change materials in inhibiting concrete cracking and provides a new way for mass concrete structures to resist cracking.