The Finite Element Analysis Of Composite Foundation Raft Temperature Field And Temperature Stress Field

In recent years, with the construction scale of engineering gradually enlarge, the research for concrete temperature field and temperature stress have great significance. Basic on Yisui highway construction project, this paper introduce the research of concrete temperature field and temperature stress in domestic and foreign. Using the large finite element software of ABAQUS to simulate and analyze concrete temperature field and temperature stress. In this paper, the experimental study is based on raft foundation of the Yisui highway. I used mature theoretical basis combined with numerical simulation to research and analyze temperature field and temperature stress.Formulate composite foundation raft temperature and temperature stress test scheme of monitoring, according to the experiment scheme prepared earlier work and collect data in the experiment. According to the test data analyzed the relationship between air temperature and the raft of the concrete temperature and research the influence of vertical depth by the atmosphere temperature on the raft concrete. Research the horizontal and vertical temperature to realize the raft of temperature field distribution. Analyze the changing temperature stress of raft concrete; emphasize analyze the stress condition of the pile raft contact place and analyze the changing stress before and after dismantling formwork in edge and angle point. Use ABAQUS to simulate the raft temperature and temperature stress. In order to simulate the temperature and the temperature stress better, using the predefined field module of ABAQUS realize the concrete strength-heat coupling, complete simulate temperature field and temperature stress on the raft. Through Comparative analysis the simulation data of ABAQUS and measured data, analyze the pile raft contact place in each direction. Using ABAQUS to simulate the raft temperature field and temperature stress in28d age and analyze simulation results in the moire figure.