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In recent years, personnel-intensive and high-rise buildings, large-scale technology and the use of functional composite construction (in concrete structures based) fires occur frequently, linear upward trend. But so far, at home and abroad for the construction of concrete structures reliability after the fire is still relatively limited research on the structure after fire damaged a comprehensive investigation and analysis, comprehensive detection and identification, design optimization and reinforcement Reinforcement application of new technologies are in exploratory stage, there is no clear norms and rules to follow, a serious impediment to the development of construction has to be placed in front of us a real problem. In this paper, Handan City, a building fires reinforcement instance, the construction of concrete structures after a fire scene investigation, detection and identification, optimization of design and construction of new technologies reinforcement measures conducted in-depth research and study, the focus of on-site investigation and detection and identification , similar to actual engineering studies for the future to provide some reference. First, start by investigating the scene after the fire, the fire scene was calculated temperature, temperature zoning map drawn fire, burning Handan developed classification evaluation criteria, shooting a damaged structure burning state, to ascertain the damaged component The number and location of recording the extent of the damage quantitative indicators divided burning damage levels. Secondly, the use of new technologies at this stage of our country, on the concrete structure after fire quantitative and qualitative identification of numerical analysis, to solve the detection means incompatible with the complexity of the fire damaged the drawbacks. Then, in the maximum use of the remaining capacity of the structure after the fire principle, proposed site design calculation methods, in addition to local needs replacing badly damaged concrete structures, other methods are used to optimize the reinforcement patch designed, selected by serious damage typical concrete analysis and calculation. Finally, to reinforce the construction program as the core, proposed the construction of the main line reinforcement, focusing on critical analysis of the construction process, and strengthening the construction of the new technology to be optimized. The project was completed in May 2009, due to take practical measures in the above methods and put into use in recent years, the whole structure in good condition and did not find any abnormality, by the owners and supervision, supervision departments of praise and received a good social and economic benefits.
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