METHODS FOR RANDOM THERMAL CREEP STRESS ANALYSIS OF MASSIVE CONCRETE STRUCTURES
大体积混凝土结构随机温度徐变应力计算方法研究

Stochastic finite element method for random the rmal creep stress inmassive concrete structures is presented. In the proposed method, various kinds of random factors including material physical parameters and random temperature in concrete are taken into account. Owing to the effect of stochastic environmental temperature, hydration heat of concrete and random heat conductivity parameters, the temperature in concrete appears to be non-stationary process. Based on the linear creep law, the effect of temperature in concrete is seperated into three parts, which are dealt with seperately. The suggested method can sovle all possible case combinations of the effect of (1) random parameters (random variables),(2) periodic stationary process of temperature, and (3) non-stationary process of temperature in concrete, and thus is useful for the safty analysis of mass concrete structures during the construction and operation period in the design situation.