基于随机温度场的重力坝施工期开裂风险分析

发布时间：2018-06-23 01:43

本文选题：大体积混凝土 + 随机温度场　；参考：《中国农村水利水电》2017年06期

【摘要】：大体积混凝土温控防裂一直是水利水电工程建设中所要研究和解决的关键技术问题,目前确定性仿真分析在大体积混凝土温控防裂研究中得到广泛应用并取得了很好的效果,但考虑各主要影响因素不确定性的大体积混凝土随机温度场、应力场研究成果较少,考虑混凝土弹性模量、导热系数、放热系数、水化温升和环境温度的随机性,基于正交数值试验,提出了随机温度场、应力场的简化计算方法,经实际工程计算表明,该方法计算效率高,能够基本反映混凝土温度场、应力场的随机特性及其主要影响因素,对类似工程的温控防裂具有一定的参考价值。
[Abstract]:The temperature control and crack prevention of mass concrete has always been a key technical problem to be studied and solved in the construction of water conservancy and hydropower projects. At present, deterministic simulation analysis has been widely used in the research of temperature control and crack prevention of mass concrete and has achieved good results. However, the random temperature field of mass concrete, which takes into account the uncertainty of the main factors, has less research results on the stress field, considering the randomness of concrete elastic modulus, thermal conductivity, exothermic coefficient, hydration temperature rise and ambient temperature. Based on orthogonal numerical experiments, a simplified calculation method of random temperature field and stress field is proposed. The practical engineering calculation shows that the method is efficient and can basically reflect the temperature field of concrete. The random characteristics of stress field and its main influencing factors have certain reference value for temperature control and crack prevention of similar engineering.
【作者单位】：四川大学水利水电学院水力学与山区河流开发保护国家重点实验室;中国长江三峡集团枢纽运行管理局;
【分类号】：TV544

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