近年来混凝土结构抗火研究进展

简要总结了近年来混凝土结构（包括新建混凝土结构、加固混凝土结构、循环再利用混凝土结构）抗火研究的主要进展，分析了其中尚存在的一些问题，在此基础上建议给出了该领域今后的发展趋势。并针对编制中的《混凝土结构耐火设计技术规程》进行了简要说明。分析表明：由于高温下混凝土结构达到变形极限状态和承载力极限状态的升温时间一般较为接近，为与常温下混凝土结构设计统一并考虑常规设计习惯，可以高温下混凝土结构的承载力极限状态为基础进行耐火设计；结构随机抗火特性、构件高温协同作用、结构整体火灾行为、减振控制装置抗火性能等是今后一段时间混凝土结构抗火领域值得关注的研究课题。参92

State-of-the-art of fire-resistance study on concrete structures in recent years

This paper presents the state-of-the-art of fire-resistance study on concrete structures including retrofitted structures and re-used structures in recent year, and discusses some issues that still need to be investigated. Based on the extensive literatures, the developing trends of fire-resistance research of concrete structures are suggested. The ‘Regulations for fire resistance of concrete building structures’ currently under preparation is introduced briefly. It can be seen that since the heating time related to the deformation limit state is generally very close to that corresponding to the load-bearing capacity limit state for concrete structures at high temperature, and considering the design practice at room temperature, the fire resistance design may be conducted based on the load-bearing capacity limit state at elevated temperature. Random fire resistance of structures, cooperative action of structural members at high temperature, fire behavior of global structures, and fire resistance of control devices are main problems for concrete structures in fire and need to be studied in the future.92Refs.In Chinese.