结构工程师2025，Vol.41Issue(6)：91-100,10.DOI:10.15935/j.cnki.jggcs.202506.0010
地震作用后FR-ECC保护钢梁的耐火性能数值分析
Numerical Analysis on the Fire Resistance of Steel Beams Protected with FR-ECC After Seismic Actions
摘要
Abstract
In order to investigate the fire resistance of post-earthquake steel beams insulated with lightweight and high ductile fire-resistive engineered cementitious composites(FR-ECC),reversed cyclic loading tests and fire tests were conducted on the steel beams.The finite element method was used to analyze the temperature field distribution and displacement change response of the steel beams subjected to fire tests under constant load conditions.The validity of the finite element models was verified by comparing with the test results,and extended parametric analyses of steel beams protected with FR-ECC materials were carried out.The research results show that the established ABAQUS finite element analysis model can effectively simulate the heat transfer process and displacement response of steel beams protected with fireproof coatings subjected to fire tests under constant load conditions.Through extended parameter analysis,it can be concluded that the higher the load ratio,the lower the fire-resistance limit temperature and the shorter the fire-resistance limit time;As the thermal conductivity of FR-ECC decreases,the heating process of the steel beam slows down,and the ultimate fire-resistance time becomes longer.Changes in thermal conductivity have the greatest impact on the steel beam in the undamaged state of the fireproofing.关键词
防火涂料/耐火极限/轻质防火ECC/有限元分析/钢梁Key words
fire-resistive coating/fire-resistance limit/lightweight fire-resistance ECC/finite element analysis/steel beam分类
建筑与水利引用本文复制引用
田力康,余江滔,俞可权,蔡自伟,肖衡林,胡春友,马旺坤..地震作用后FR-ECC保护钢梁的耐火性能数值分析[J].结构工程师,2025,41(6):91-100,10.基金项目
国家自然科学基金资助项目(51478362) （51478362）
