摘要
确定了高温下钢材和混凝土的热工参数和应力-应变关系模型,建立了标准升温条件下局部填充混凝土(Partial Encaed Concrete,PEC)柱抗火性能分析的有限元模型,计算了火灾下PEC柱的变形曲线及耐火极限。计算结果经已有试验数据的验证,吻合较好。分析表明,无耐火保护PEC柱的耐火极限小于现有抗火标准的要求,分析模型可为进一步研究PEC的抗火性能及设计方法提供参考。
The thermal properties and the stress-strain relations of the steel and concrete under the high temperature were determined.A finite element model was made to analyze the fire resistance performances of PEC columns under the standard warming conditions,and the deformation curves and fire resistance limit of PEC columns under the fire were calculated.The results show that the fire resistance limit of PEC columns without any insulation may not meet the demand of the current fire resistance standard.The model can be of some reference for further investigation on the fire behavior and design of PEC columns.
出处
《苏州科技学院学报(工程技术版)》
CAS
2011年第2期24-27,共4页
Journal of Suzhou University of Science and Technology (Engineering and Technology)
基金
国家自然科学基金(50708062)
江苏省结构工程重点实验室开放课题(ZD0804)
关键词
PEC柱
有限元模型
耐火极限
PEC columns
finite element model
fire resistance limit