Research On Post-fire Detection,Identification And Reinforcement Design Of A Brick-concrete Structure

Fire is one of the disasters that endanger public safety and affect social and economic development.After entering the twentieth century,the number of building fire cases also increased.The occurrence of building fire not only threatens human life,but also endangers economic property.How to restore the use function of buildings after fire is of great significance to human beings.Based on the research background of the detection,appraisal and reinforcement design of a brick-concrete structure after fire,this paper carries out in-depth analysis and research.The main contents are as follows:(1)To investigate the fire action,damage degree and residue of fire structure on site,to determine the overfire temperature from the burning time,damage and residue characteristics,and to divide the temperature field;at the same time,to verify the seismic structural measures of building structure.(2)According to the actual overfire situation of the building,select the detection method that accords with the structure.Performance tests are carried out from the aspects of foundation,section size,strength of sintered brick and mortar,thickness of protective layer and strength of concrete components,and field test data are processed and analyzed.(3)After the fire,the bearing capacity of masonry wall and concrete components is calculated,and PKPM software is used to calculate the bearing capacity of the project according to the measured data,and the results are compared,the results are consistent;the actual project is appraised and rated according to the relevant standards and specifications.(4)Make use of PKPM software to calculate and analyze the structure after fire,put forward reasonable reinforcement scheme according to actual engineering damage,input the scheme into PKPM software for reinforcement design checking,and carry out comparative analysis before and after reinforcement.