Research Of Fire-Resistance For The Steel Structural Construction

The architectural velocity of the steel structural construction is quick, its earthquake resistance performance is good, and its architectural modeling is beautiful and changeful. Its application prospect will be very extensive along with the output of the steel became more and more and architectural technology unceasing progress. But the poor fire-resistance ability is the main weakness of steel structure, its basic mechanical property such as strength and elastic modulus and so on decrease severely in high temperature. When fire occurs, the steel structure construction has the possibility to have the serious destruction, even the premature whole collapses, creates the serious economic loss and the personnel casualty. In china, test-based fire resistance design method is the prevailing fire resistance design method for steel structures. However, using the test-based fire resistance design method, it is costly and very difficult to simulate the magnitude and distribution of loads and the end restriction conditions of the specimens in the structure,etc. Through the computation determined the steel structure the fire-resistant limit supporting capacity, may reasonably determine the steel structure the fire protection protective measures. Therefore, a thorough study of the calculation-based fire resistance design method has great theoretical significance and practical value.In this article, based on the research dynamic condition of steel structures fire resistance in the domestic and foreign, according to the heat transfer study classical theory, obtaining from the design variable choice and the determination, using the ANSYS finite element software, has established the steel frame under fire condition heat transfer model, the external force load and under the temperature load together function stress model, synthetic considered the material non-linearity and the geometry non-linearity, researches the overall fire-resistant.This article mainly carries on the ANSYS value simulation analysis comparison to...