外伸端板节点的实用防火设计

A Practical Approach for Fire Resistance Design of Extended End-Plate Joints

梁柱节点对钢结构在火灾中的性能产生显著影响,这一点尽管已经广为人知,但是一直以来都没有一种方法可以分析评估火灾中外伸端板节点的性能。本文基于中国钢结构设计规范[中国钢结构设计规范,2003]和建筑钢结构防火技术规范[中国建筑钢结构防火技术规范,CECS,2006],分析了火灾中外伸端板节点的承载力,考虑了钢材在温度升高时的力学特性。基于组合节点包括螺栓、外伸端板、柱翼缘和节点域等,在温度升高时的承载力,提出了一个用于节点防火计算和评估的实用方法。采用此法对2个外伸端板节点的临界温度进行了预测。通过与试验结果的对比验证了该方法的有效性。

Although beam-to-column joints are known to have a very significant effect on the behaviour of steel frames in the event of fire, no specific approach for evaluating the behaviour of extended end-plate joints in fire has been proposed. In this paper, on the basis of the current Chinese Code for Design of Steel Structures [Chinese code for design of steel structures. 2003] and Technical Code on Fire Safety of Steel Building Structures [Chinese Technical code on fire safety of steel building structure. CECS, ...