| Building fire accounted for about80%of all kinds of fire, about30thousand timesof fire happened in China every year, which resulted in a direct economic loss of about1billion yuan. Renforced concrete structure is the the most extensive construction formin our country at the present.The mechanic properties of concrete and the bondproperties between steel and concrete would be changed after fire, which resulted in adegeneration of bearing capacity and safety performance of the structure. The qualityevaluation, testing and strengthening are the key issues of the structure after fire.With the detection and repairing and reinforcement process of Jinwei supermarket,which has been suffered with fire accident in Changzhi city of Shanxi province, thetemperature judgment methods, the bearing capacity detection methods and thereinforcement technique of structure after fire are analyzed in this paper. The mainconclusions in this thesis have been summarized as follows:(1) The theoretical basis for determining the fire temperature is analyzed, theadvantages and disadvantages of each methods are compared, combined with theengineering examples, the project of fire temperature judgment methods are proposed.(2) The main detection methods and identification procedures of post fire concretestructure and the testing methods for strength of concrete members after fire arereviewed, and the advantages and disadvantages of each methods are compared,combined with the fire engineering example, the strength of the concrete after fire aretested.(3) Combined with the fire engineering example, the engineering practice ofdetection and identification of post fire concrete structure are developed. (4) The strengthening methods of concrete structure after fire are analyzed and theadvantages and disadvantages of each method are compared, combined with the fireengineering example of Kingway supermarket, reinforcement scheme of concerte afterfire are put forwarded. |
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