摘要
利用高温下钢筋混凝土柱基于虚梁法的数值模拟程序RCSSCF,分析轴压比、计算长度、截面尺寸、荷载偏心率、配筋率和荷载角等参数对ISO 834标准升温过程下典型受火方式钢筋混凝土T形柱耐火性能的影响规律.通过15 552种工况下T形柱的高温反应分析和计算,定量给出3种受火方式下钢筋混凝土T形柱耐火极限的实用计算方法.研究结果表明,严格控制轴压比是提高典型受火方式下T形柱耐火性能的有效措施;典型受火方式下,T形柱的耐火极限随计算长度的增加而线性减小;荷载角对典型受火方式下T形柱的耐火极限影响较大.
Using the numerical program RCSSCF for the reinforced concrete column based on the conjugate beam method, the influence of various parameters on the fire resistance performances of T-shaped columns subjected to the ISO 834 standard fire with typical fire exposure eases is investigated, such as axial load ratio, effective length, sectional dimension, load eccentricity ratio, reinforcement ratio and load angle. The fire response of 15552 columns is analyzed. Based on the simulation results, a practical calculation method is proposed for the fire resistance of T-shaped columns subjected to three typical fire exposure cases. The simulation results indicate that.. （a） reducing the axial load ratio is an effective measure to improve the fire resistance of T-shaped columns subjected to typical fire exposure cases; （b） the fire resistance of T-shaped columns subjected to typical fire exposure cases decreases linearly with increasing of effective length; and （c） the influence of load angle on the fire resistance of T-shaped columns subiected to typical fire exposure cases is significant.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2010年第2期218-223,共6页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金资助项目(50908091)
福建省青年科技人才创新项目(2007F3064)
华侨大学科研基金资助项目(07BS405)
关键词
等肢T形柱
耐火性能
T形截面
数值模拟
受火方式
T-shaped columns with equal legs
reinforced concrete
fire resistance
T-shaped cross section
numerical simulation, fire exposure
