Technical Condition Evaluation Of Concrete Beam Bridge After Fire Technology

As road transport continue to developed, and many bridges. In recent years, highway bridge burst accident frequency sent, accident reasons has fire, and overload vehicles, and flood disaster, and earthquake damaged, and travel impact,, on highway bridge of security operation caused huge of hidden, and fire to it huge of destructive, is most serious of bridge disaster one of, bridge fire and other burst accident compared, its significantly features is: fire occurred suddenly, not only on bridge concrete structure parts itself for mechanical performance occurred change and caused damage, from micro angle told, Water physical and chemical effects of reinforced concrete the qualitative changes in the microscopic particles of the material, on the durability of the bearing capacity of the bridge and the causes of long-term response.Concrete girder bridge is a highway bridge, the main bridge. In recent years, fire event frequently occurred, makes Bridge hosted capacity and traffic capacity are occurred different degree of declined and loss, fire Hou and not suitable do load contains test detection, so how can fast of on fire beam bridge of technology status for evaluation? current specification highway bridge conservation specification(JTG H11--2004) and the Ministry recommended sex standard highway bridge technology status evaluation standard(JTG/T H21--2011) in the are not clear fire bridge of disaster Hou detection assessment standard, In my opinion, for bridge detecting after fire should also be more specific, clear and effective way.This article will address special cases of the disease after fire damage of concrete girder bridge, combined with the General similarity of the diseases, based on the code for highway bridge and culvert maintenance(JTG H11--2004) and related bridge index appearance combines measurement, detection data, damage calculation, from the angle of bridge detection and evaluation, testing and evaluation of research on concrete beam bridge after fire:(1) through the study of universal characteristics so as to bring concrete beam bridge of fire fire fire fire fire when characteristic analysis, in-depth study of concrete under high temperature, reinforcing steel, concrete and steel the gripping force of change.(2) through the study of diseases of concrete bridge components fire characteristics, put forward after the fire scene examination procedures, instrumentation indicators, calculation methods to determine the component indices of the situation after the fire.(3) for fire damage, weight various parts of amendments proposed programmes, evaluation standards, calculation methods of the various components, and standard methods for the assessment of reinforced concrete beams after fire;(4) to a bridge of reinforced concrete beams after fire detection and evaluation method for example above, finally, problems and prospects.