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通过与非线性有限元模拟比较,对结构钢构件在升温下的设计公式进行了评估。比较美国钢协与欧洲标准委员会对温度在800℃侧向无支撑的Ⅰ型柱、梁、柱-梁的设计规定。欧洲规范3的规定与有限元模拟的结果相差10%～20%。另一方面,美国钢协的规范预测的强度与模拟结果相差高达2倍。对于温度超过300℃的中细构件,相差最大。提出了对美国钢协规范计算公式的修正建议,修正后的精度与模拟的结果误差在20%～30%。最后讨论了结构防火工程基于构件评估的局限性、未来的研究以及发展方向。
Through the comparison with nonlinear finite element simulation, the design formula of structural steel components at elevated temperature was evaluated. Compare design rules for type I columns, beams, columns and beams with no support at a temperature of 800 ° C by the American Steel Association and the European Standards Committee. The difference between the European Regulation 3 and the Finite Element Simulation results is 10% to 20%. On the other hand, the specifications of the American Steel Association predict the strength of the simulation results differ by up to 2 times. For the temperature exceeds 300 ℃ in the fine components, the biggest difference. Proposed amendments to the US Steel Association standard calculation formula, the corrected accuracy and simulation results in the error of 20% to 30%. Finally, the limitations of structural fire assessment based on component assessment, future research and development direction are discussed.