Theoretical Analysis And Experimental Research On Temperature Action Of Space Structure

Structure suffers hot and cold along the year in entironment. Temperature action in structure is ubiquitous. Temperature affects structure in two aspects: deformation and stress. In order to meet the use requirement, span of structure becomes larger and larger and style becomes complexer and complexer. Temperature action should be taken into account in structure design and construction.With the project main palaestra roof structure of Nanjing Olympic sports center, theoretical analysis and experimental research of temperature action is discussed in this paper. Calculation method of temperature action is summaried and deficiency is pionted out. Finite element analysis is suggested to be done after the real temperature distribution has been found through experiment.Finite element programme ANSYS is used to analyze temperature action according to the work condition which is provided by designer. The result indicates that temperature will have large influence on stress and deformation and the work condition including temperature maybe the control work condition.The rigidity of concrete structure below the roof,abutment rigidity of arch foot and sunshine radiation are analyzed as factors of temperature action in roof structure. It shows that the rigidity of concrete structure has little effect on temperature action, but the rigidity of arch foot affects temperature action more and is the determinant that assures the arch mechanic behavior .The analysis result also shows sunshine radiation should not be neglected.Model experiment is the necessary means that can validate the calculation method and supposition of new style structure. Experiment data are compared with theoretical analysis data. The result indicates the supposition in theory calculation accords with the real circs and precision of calculation meets the need. In addition, error analysis has been done.Temperature action in space grids and latticed shell is different. Characteristic of temperature action is analysed and different abutment is discussed. In the end, construction advice for main arch closure temperature, closure time, closure methods is put forward.