Damage Evaluation And Authentication Research For Reinforced Concrete Structure After Fire

Fire is a kind of disaster that threatens the public safety and brings great loss of mankind annually. After fire, the carrying capacity, deformation, durability and anti-seismic performances of the members are damaged in different degree, which decreases durability and building safety. Currently, the research on damage evaluation and authentication research for structure are not enough. The theory researches are not embedded in the durability, anti-seismic performance of the building structure after fire. In the practical work of inspecting and evaluating projects, the means of surveying and the intricacy of damage aren't fit, which make damage evaluation and authentication research simplistic and incomplete. Therefore, there is important significant for deep developing damage evaluation and authentication research of reinforced concrete structure after fire. The paper combines the actual project to analysis and study.This paper mainly analyzes and researches the development of indoor fire temperature and the rule of temperature distribution in the internal components; performance affect of the fire to reinforced concrete structures and the calculating methods of the member remaining capacity; take a fired factory's damage evaluation and authentication research for example, according to the rule and characteristics of fire(high temperature)affect on member performance, some quantitative and theoretical analysis for the bearing capacity, deformation, durability and anti-seismic performance of reinforced concrete structures have been carried out, bring forward methods for damage evaluation and authentication research of fire member capacity, deformation, performance and durability, anti-seismic performance, analysis and discuss these methods for building after fire.Based on the analysis and research, some conclusions are elicited:1.According to the rule of the fire damage to the buildings, the fire scene test takes practical sampling methods, which accurately judge member materials performance. Vertical elements (columns, shear walls) should sample or detect in the column, the shear wall. If we sample or detect under the member, should judge the fire temperature of the top and bottom of members according to the member's appearance feature. After cooling, the results can be adjusted according to the reduced coefficient of the compressive strength.2.In the test of member concrete carbonation depth after fire, in addition to measuring the test area and test hole according to the conventional carbonation depth, the test area and test hole should be collocated according to the affect of the fire characteristics to carbonation depth.3.The collapse of concrete members influences greatly on the bearing capacity of reinforced concrete members in a fire. For the exposed steel members caused by the collapse of concrete, the...