重力坝的随机温度场初探

Primary Research on Random Temperature Field of a Typical Concrete Gravity Dam

由于施工期和运行期各种随机因素的影响 ,使重力坝温度场成为随机 .本文综合考虑了环境温度(包括气温和库水温度 )、混凝土绝热温升、入仓温度以及混凝土和基岩的热学参数随机性的影响 ,基于随机有限元法 ,给出了重力坝随机温度场的计算方法 ,对一典型重力坝按给定的施工进度模拟分层浇筑施工过程 ,对施工期及运行期前期的随机温度场进行了计算 ,并得出了一些有益的结论 .

Under the influences of random variabilities,during both construction period and operation period,the temperature field within a gravity dam body could be regarded as a random one.In this paper,stochastic finite element methods are suggested to deal with the random temperature field.By use of the suggested methods,the influences of random environmental and random hydration heat of concrete and the initial temperature of concrete as well as the thermal parameters of both concrete and rock foundation are all taken into account.According to a scheduled time table of construction,random temperature fields of a typical concrete gravity dam within both the construction period and the operation period are calculated by emulation the layer constructing of the dam.Some useful conclusions are obtained from the computational results.