摘要
利用有限元软件ABAQUS建立了外包钢加固钢筋混凝土柱的温度场和力学分析模型,应用钢筋混凝土柱的抗火试验数据对模型进行验证。采用验证后的模型分析了轴压比、偏心率、荷载比以及承载力提高系数对外包钢加固钢筋混凝土柱抗火性能的影响规律。分析结果表明:随着轴压比、荷载比和偏心率的增加,加固柱的耐火极限减小。对于轴心受压柱,承载力提高系数的增加对加固柱耐火极限影响很小;对于偏心受压柱,随承载力提高系数的增大加固柱的耐火极限增大,但增幅有限。在荷载比相同的前提下,偏心率对柱的耐火极限影响不显著。
The thermal field and mechanical performance model of reinforced concrete columns strengthened with angle steel were established by using FEA software ABAQUS. The FEA model was verified by the fire perfor-mance test results from the reinforced concrete columns. The validated model was then used to analyze the influ-ence of related factors on fire resistance, including axial compression ratio, load eccentricity ratio, load ratio and increasing coefficient of carrying capacity. From the results, we can see that the fire resistance of the strength-ened columns decreases with the increase of axial compressive ratio, load eccentricity and load ratio. For the ec-centric compression columns, the fire resistance of the strengthened columns increases little with the increase of improvement of bearing capacity coefficient, but the increase is limited. Under the same load ratio, the eccentric-ity ratio presents little influence on the fire resistance limit of the above-mentioned columns.
出处
《苏州科技学院学报（工程技术版）》
CAS
2015年第1期37-40,57,共5页
Journal of Suzhou University of Science and Technology （Engineering and Technology）
基金
江苏省"333工程"中青年学术带头人项目(2011-24)
江苏省"六大人才高峰"项目(2012-JS-004)
