The Computation And Application Of A Reinforced Concrete Slab Temperature Field Under High Temperature Condition

As a main kind of structural engineering material, reinforced concrete has already been used widely in many engineering fields as its technique and economy feature. Structure fire hazard caused more and more damage as the continuous developing of national economy. In nowadays ,the reinforced concrete structure is one of the most widely used structure form. The research in the reinforced concrete structure's resistance to high temperature is very significative. The research in reinforced concrete components' resistance to high temperature is one of important foundation of structural resistance to fire hazard research. As the horizon supporting part, reinforced concrete floor is resist the great mass of the fire hazard damage. So the research of it is very important. But the research in this field at present is not enough.In fire hazard course , the components which resist the fire hazard action need to bear not only the general industrial and civilian constructions' load but also the temperature load. This article has quoted the domestic and foreign scholars research in the reinforced concrete material under high temperature working performance theory, uses large-scale finite element common software ANSYS to carry on the temperature field simulation, produces the component supporting capacity computational method using the norm, infers the opposite side simple support the reinforced concrete unidirectional board in under the ISO standard elevation of temperature curve function limit anti-curved supporting capacity, then infers the fire load equivalent transformation for the live load formula, thus in quite concise description fire process steel bar concrete slab attenuated process.Chinese present structure fire resistance design method uses based on the standard elevation of temperature curve experiment examines the law, it has stipulated the building fireproof rank. The building fireproof rank has decided the component fireproof limit. Designs the component the fireproof limit by to use the standard elevation of temperature curve the experimental examination. This method theory is simple, but seriously divorced from the reality actually. The standard elevation of temperature curve cannot represent the actual fire elevation of temperature curve. In the majority of situations are far from practice. This article educes a computational method that is low regarding request the elevation of temperature curve, to any elevation of temperature curve may be the simple computation.