摘要
基于对常温下预应力型钢混凝土梁承载性能的研究,利用截面有限单元法建立了预应力型钢混凝土梁在火灾高温作用下的正截面抗弯承载力简化计算公式.并针对试验梁进行了计算分析,得到了基于标准升温情况下的正截面抗弯承载能力与升温时间的全过程关系曲线,揭示了预应力型钢混凝土梁随着升温时间的增加,其正截面抗弯承载力显著降低的劣化规律.将试验梁抗弯承载力的计算结果与试验实测结果进行了对比分析,相对误差为9.3%.
Based on the bearing performance temperature, the simplified calculation formula for prestressed steel reinforced concrete beam at normal the bending bearing capacity of the prestressed steel reinforced concrete beam under high temperatures is established by means of the cross-sectional finite element method. The relationship between the beam bending capacity and the standard heating time during the whole process is obtained. The relationship curve reveals a degradation rule that the bending bearing capacity of the cross section is decreased significantly with the increase of comparison between the calculated bending capacity and the measured one shows with a relative error of 9.3%. heating time. The a good agreement
出处
《西南交通大学学报》
EI
CSCD
北大核心
2013年第4期625-631,658,共8页
Journal of Southwest Jiaotong University
基金
国家自然科学基金资助项目(50978158
51278289)
上海市工程结构新技术重点实验室开放课题(2012-KF03)资金的资助
关键词
火灾
预应力
型钢混凝土
抗弯承载力
fire
prestress
steel reinforced concrete
bending bearing capacity