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基于欧洲规范,对钢筋混凝土柱在不同因素影响下的抗火性能进行了研究。介绍了国内外钢筋混凝土柱抗火研究现状,以欧洲规范为依据,提出了一个基于横截面计算的数值分析模型。分析了在ISO 834标准火的作用下,受火时间不同时,钢筋混凝土柱截面的温度分布以及极限承载力,并分别与欧洲规范和已有试验数据进行了对比,证明了计算模型稳定可靠。结合大量试验研究结果,讨论了受火时间、受火方式、截面尺寸、配筋率、轴压比和荷载偏心距、混凝土保护层厚度以及混凝土柱的长细比等因素对钢筋混凝土柱抗火性能的影响。
Based on the European Code, the fire resistance of reinforced concrete columns under the influence of different factors was studied. The current research status of the fire resistance of reinforced concrete columns at home and abroad is introduced. Based on the European standard, a numerical analysis model based on cross section calculation is proposed. The temperature distribution and the ultimate bearing capacity of reinforced concrete columns under different fire time are analyzed under the action of ISO 834 standard fire. Comparing with the European standard and the existing experimental data respectively, it is proved that the calculation model is stable and reliable. Combined with a large number of experimental results, the effects of fire time, fire pattern, cross-sectional dimension, reinforcement ratio, axial compression ratio and load eccentricity, concrete cover thickness and slenderness ratio of concrete columns are discussed. The impact of performance.