偏心率对钢管混凝土芯柱的耐火极限影响分析

摘要

针对在高温环境下对T形钢管混凝土芯柱的耐火极限进行研究，利用有限元分析软件建立T形钢管混凝土芯柱的数值计算模型，探讨了T形钢管混凝土芯柱不同的偏心率对其耐火极限的影响规律，有限元数值计算结果表明：钢管混凝土芯柱具有良好的耐火抗火性能，而偏心率对耐火极限影响较大，偏心率越小，其耐火极限越高。%According to the research on the fire resistance of T-shaped steel tube core under high temperature, the paper adopts the finite ele-ment software to establish the numeric calculation model of T-shaped steel tube core, explores the influential law of the different eccentricities on their fire-resistance of the T-shaped steel tube core, and proves by the calculation result of the finite element calculation that the steel tube con-crete tube core has better fire resistance and its fire resistance limitations are higher with larger influence of the eccentricities on fire resistance limitation and smaller eccentricities.