| However, owing to the distribution complexities and the many influential factors of thermal stress of massive concrete structure, it is impossible to get its accurate analytic solutions in practice. As the rapid development in computing science, nowadays there have been many computational simulation technologies that can be applied to thermal stress of massive concrete, and among them, the most wide application method is finite element method. Based on the finite element analysis, the calculations and analyses of thermal stress of the complicated bottom board massive concrete of skyscraper are studied in the paper, and the main researches are as follows:(1)The temperature field theories and thermal stress theories of massive concrete are packed up systemically for the actual project in-depth study.(2)Based on the theory of massive concrete,the solution of approximate calculations and analyses of thermal stress of the complicated bottom board massive concrete of skyscraper are ? worked out(3)The paper takes advantage of the MIDAS/CIVIL to make numerical simulation analysis in the complicated bottom board massive concrete of skyscraper, the general regularities of temperature field and thermal stress of massive concrete have been concluded.(4) The control method of massive concrete thermal crack is solved by structural design ,?materialand fabrication.On the basis of the researches mentioned above,some crucial conclusions are acquired as follows:(1) The finite element analysis simulation technology adopted to compute the temperature field and stress field of the massive concrete in this paper is effective for evaluating temperature-caused-dehiscence and designing temperature crack-controlling measure.(2) All relevant factors are demanded for full consideration,and then careful temperature crack of the complicated bottom board massive concrete of skyscraper controlling scheme should be established with the method of system engineering.
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