考虑温度效应的固结问题有限元分析  

Finite element analysis of thermal consolidation

作　　者：傅少君[1] 吴秋军[1] 黄振科[1] 

机构地区：[1]武汉大学,湖北武汉430072

出　　处：《土木工程学报》2009年第1期95-100,共6页China Civil Engineering Journal

摘　　要：研究热固结问题需考虑诸多因素、试验条件不易控制且所需时间长从而难以实现,因此辅以数值计算手段具有十分重要的意义。本文根据饱和土体热固结问题中温度、渗流及应力之间的复杂耦合关系,系统地探讨了二维有限单元方法的求解过程,并在FORTRAN语言环境下研制了相应的计算机分析程序APOSE-T。文中选取一典型算例并进行适当改编,应用APOSE-T程序分析研究土体热固结问题的主要规律,同时也考证了程序的正确性。研究表明,水和土颗粒的压缩性一般对孔压的变化速度有延缓作用,但对固结效果影响不显著,故一般的固结分析时可以忽略;在不考虑自身发热条件下,研究域内经历先升温然后降温的过程,但在升温前的短时间内有微小的降温,且温度对固结的影响时间不长。本文的研究成果为分析热固结过程提供了一条有效途径。Many factors, experimental conditions and long time duration need to be considered in thermal consolidation analysis. Therefore, it is of great significance to study thermal consolidation problems using numerical methods. In this paper, the solution process for thermal consolidation problems is studied by using two- dimensional finite element method with temperature, seepage and stress coupling for saturated soils. The corresponding computer code, APOSE-T, is developed on FORTRAN Power Station and a typical example of application presented that verifies the validity of the code. The results indicate that the compressibility of water and soil grain usually delay the rate of pore pressure dispersion, but the effect is insignificant. If without taking account of heat generation in soil, the temperature increases first and then decreases. However, there is a slight decrease of temperature in a short period time before it increases.

关 键 词：热固结 耦合关系 有限元程序 饱和土 

分 类 号：O357.3[理学—流体力学] TU41[理学—力学]