Simulation Researches On Temperature Field And Thermal Stresses Of Mass Concrete

It's of practical importance that research intensively the temperature field, displacements field and stresses field of mass concrete during it's construction and operation. Firstly, the paper introduces the engineering background of the research as "the simulation researches on temperature field and thermal stresses of mass concrete", and then displays contents and present situation of the researches. In the paper, infinite element method (IEM) coupled with FEM, ICCG method and dynamic management memory are used to improve operation efficiency, using 8 points 2d finite element, 5 points infinite element, 20 points finite element and 12 points infinite element. On another hand, the paper solves the contact problems between concrete blocks sucecessfully by introducing a new type of contac-friction element, which makes the relative displacements and contact stress between points as unknown quantities directly. In order to calculate the autogenous volume deformation according to actual temperature change, the paper introduces a new "equivalent age" method, and the Optimization study on hydrograph of autogenous volume deformation is also disscused. There are some examples are offered in the relative chapters.Finally, the paper discusses the programming methods and numerical methods of analysis, as well as simulating methods of the properties that changing by time.The examples indicate that the algorithm is rational and feasible.