Inverse presumption method for temperature fields of spatial structure based on residual displacement
CUI Jing1, YIN Ling feng1, GUO Xiao ming1, TANG Gan2
1. School of Civil Engineering, Southeast University, Nanjing 210096, China; 2. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
A temperature inversion presumption method was developed based on post fire structure residual deformations according to the inverse problem for temperature field of spatial structure exposed to fire. The difference between measured and finite element method values was made as optimization object function. An inverse algorithm was constructed by selecting an eligible weight function. The temperature field distribution was obtained by iterative calculation. A theoretical basis for scientificly evaluating the residual performances of post fire structure and formulating reliable repair and reinforcement schemes was provided. Williams toggle frames for fire experiment were designed. The collected test data was compared with the presumption results. The method is feasible and the results have enough accuracy.
CUI Jing, YIN Ling feng, GUO Xiao ming, TANG Gan. Inverse presumption method for temperature fields of spatial structure based on residual displacement. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2016, 50(4): 720-726.
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