摘要
在实际工程中,由于柱所处位置的不同,会形成单面受火、相对或相邻两面受火和三面受火等非均匀的受火边界条件。采用ABAQUS软件,计算了内配型钢方钢管混凝土柱非均匀受火时的温度场和耐火极限,发现非均匀受火时由于温度场分布的不均匀将会产生附加偏心距和附加挠度,其受火性能有别于均匀受火;同时,还计算了构件跨中接触应力和参数的变化。结果表明,柱的截面尺寸和细长比对柱的非均匀火承火能力影响较为显著。
In actual project, the different locations of the column will form a non-uniform thermal boundary condi- tions, such as single-side, adjoining or back to back two sides and three sides. The temperature field distribution and the fire resistance limit of the concrete-filled square steel tubular （CFST） columns with encased profiled steel was calculated with software ABAQUS. It is found that the non-uniform distribution of temperature field should result in additional eccentricity and deflection which is different from uniform fire cases. The mid-span contact stress and parametric change of members were also calculated. Results show that the cross-section dimension and slenderness ratio of column have more significant effects on the non-uniform fire bearing capacity of the column.
作者
韩祎
毛文婧
王文达
HAN Yi MAO Wenjing WANG Wenda(Department of Civil Engineering, College of Engineering, Gansu Agricultural University, Lanzhou 730070, China Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou 730050 ,China)
出处
《自然灾害学报》
CSCD
北大核心
2016年第5期149-157,共9页
Journal of Natural Disasters
基金
国家自然科学基金项目(51468037)
陇原青年创新人才扶持计划~~
关键词
内配型钢方钢管混凝土
非均匀受火
数值模拟
ABAQUS
承载力影响系数
concrete-filled steel tubular （CFST） column with encased profiled steel
non-uniform fire
numerical simulation
ABAQUS
influence coefficient of bearing capacity.
