山东建筑大学学报2016，Vol.31Issue(1)：7-13,7.
火灾中带裂缝钢筋混凝土梁承载力算法研究
Calculation method of bearing capacity of reinforced concrete beam with cracks under fire
摘要
Abstract
In this paper,the capacity formulas of reinforced concrete beam with cracks under fire are proposed to study the effect of cracks on reinforced concrete structure,providing the reference for structural fire design. This paper presents a calculation method of reinforced concrete beam with cracks under fire. The temperature field calculation of the reinforced concrete beam with cracks under fire is achieved by ABAQUS. According to the results,isothermal of 300 ℃ and 800 ℃ is achieved. Combined with the calculation formula of reinforced concrete beam under the fire,the ultimate bearing capacity formulas of reinforced concrete beam with cracks are created. By using a case,the result of reinforced concrete beam with cracks and without cracks is obtained. The results indicate that the beam with cracks is 50% ~ 144% higher than that without cracks under the same conditions,and the beam with five cracks is 2. 7% ~11. 5% higher than that with one crack. The results can be obtained that the bearing capacity of beam with cracks is 47% ~82% less than that without cracks.关键词
钢筋混凝土梁/火灾中/裂缝/温度场/极限承载力Key words
reinforced concrete beam/fire/cracks/temperature field/ultimate bearing capacity分类
建筑与水利引用本文复制引用
王玉镯,王灿灿,傅传国..火灾中带裂缝钢筋混凝土梁承载力算法研究[J].山东建筑大学学报,2016,31(1):7-13,7.基金项目
国家自然科学基金资助项目(No. 51378302) （No. 51378302）
山东省科学技术发展计划项目(2013GSH2005) （2013GSH2005）
济南市高校院所自主创新计划项目(201303076) （201303076）
山东省高校科研发展计划项目(J11LE06) （J11LE06）
住房和城乡建设部科学技术项目(2013-K2-39) （2013-K2-39）
