Research On The Detection Technology Of The Reinforced Concrete Structure

Fire is a kind of disaster that threatens the public safety and brings great loss of mankind annually. At present, after fire building structure in detecting, fire detection technology and the complexity of the injury can not meet, especially in the research on quantitative analysis of burning degree and the remaining capacity is not enough. A systematic study of detection technology on component suffered fire is made:(1)Fundamental principles of the main detection methods on component exposed to fire are introduced, comparing the advantages and disadvantages of various methods in economy, practicality, accuracy aspects.(2) Produce columns subjected to fire on four surfaces and detect it, the following conclusions are reached:the methods of apparent assay and neutralization depth can be used for qualitative analysis and zoning the fire district. In preliminary identification combining ignition loss method and core-drilling method can analyze accurately concrete components suffered fire damage in quantitative assessment.(3) Pointing out that the current using of the cross section temperature field to calculate the remaining capacity is the residual capacity of the components under high temperature in the ideal state. Introducing a kind of model which uses the burning depth to calculate the remaining capacity of the columns subjected to fire on four surfaces.(4)Supplement and improve the standard for building structural assessment after fire.(5) Using the improved standard to assess and reinforce the workplace after fire, scientific and practical is realized.