Finite Element Analysis For Temperature Field And Temperature Stress Of Concrete Structrue

Considering architecture appearance and construction design, over-long frame structures without expansion joint have been widely used in engineering project. While it has been recognized that the deformation of such structures in response to temperature changes will induce thermal stresses that are comparable to the stresses induced by dead or live loads, and the difficulty is how to simulate a valid structure temperature field and estimate the deformation under the changing temperature field, then in order to evaluate thermal stresses and critical cracks caused by restricted deformation.In the thesis, the study actuality about temperature stresses of concreted bridge frame is firstly summarized, and some finite element analysis theories and methods of concrete are also introduced in brief. and calculating software about temperature field and temperature stresses are developed trough OO C++ programming language based on some test.The main study of this thesis includes five parts:Firstly, some concrete models of test are done, temperature field in different environment are tested trough temperature sensor DALLAS made in America;secondly, finite element analysis about temperature field are done according heat exchanged theory, and format of finite element about temperature field are deduced in element of eight -node hexahedron.Thirdly, finite element analysis about thermal stresses are done according heat changing theory, and format of finite element about thermal stresses are deduced in element of eight -node hexahedron.Fourthly, calculating software about temperature field and temperature stresses are developed trough OO C++ programming language according format of finite element about temperature field and thermal stresses above,Finally, a test-model is chosen as calculating example and modeling are made through ANSYS, and calculating of static temperature field and thermal stresses are done in program above and ANSYS, calculating result in two methods are contrasted, validity and practicability of method In the thesis are validated consequently.