| 高温后方钢管混凝土双向压弯构件的承载力计算方法 |
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| 引用本文： | 姜绍飞,于清海,李跃武.高温后方钢管混凝土双向压弯构件的承载力计算方法[J].沈阳建筑工程学院学报(自然科学版),2009,25(3):495-500. |
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| 作者姓名： | 姜绍飞 于清海 李跃武 |
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| 作者单位： | 姜绍飞,JIANG Shaofei(福州大学土木工程学院,福建,福州,350108;沈阳建筑大学土木工程学院,辽宁,沈阳,110168);于清海,YU Qinghai(沈阳建筑大学土木工程学院,辽宁,沈阳,110168);李跃武,LI Yuewu(中铁十九局集团公司第三公程有限公司,辽宁,辽阳,111000)
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| 基金项目： | 教育部重点科研项目，沈阳市科技局科技项目，福建省青年科技人才项目 |
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| 摘 要： | 目的评估高温作用后钢管混凝土双向压弯构件的残余承载力.方法对高温作用后方钢管混凝土双向偏压构件进行了数值计算、试验研究和理论分析.结合16个方钢管混凝土柱高温后双向偏压承载力的试验研究,对数值计算程序进行了验证,在试验数据和数值计算基础上,分析高温作用后方钢管混凝土双向压弯构件的承载力损伤系数kr的主要影响因素.结果经回归分析得到kr表达式,将kr与常温下计算公式相结合,得到高温后钢管混凝土双向压弯构件残余承载力的简化计算方法.将简化计算值与试验结果、数值计算进行比较发现三者吻合较好.结论笔者提出的简化计算方法是有效的,可为灾后钢管混凝土的损伤评估及修复加固提供技术支持.
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| 关 键 词： | 方钢管混凝土 高温作用 双向偏压 承载力损伤系数 |
Calculation Method of Bearing Capacity of Rectangular Concrete-Filled Steel Tubular Members after High Temperature Subjected to Biaxial Force and Bending |
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| JIANG Shaofei,YU Qinghai,LI Yuewu.Calculation Method of Bearing Capacity of Rectangular Concrete-Filled Steel Tubular Members after High Temperature Subjected to Biaxial Force and Bending[J].Journal of Shenyang Archit Civil Eng Univ: Nat Sci,2009,25(3):495-500. |
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| Authors: | JIANG Shaofei YU Qinghai LI Yuewu |
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| Affiliation: | JIANG Shaofei, YU Qinghai ,LI Yuewu (1. College of Civil Engineering,Fuzhou University,Fuzhou China,350108 ;2. School of Civil Engineering, Shenyang Jianzhu University, Shenyang China, 110168 ;3. Third Engineering Co. , Ltd, China Raiway 19 Bureau Group, Liaoyang China, 111000) |
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| Abstract: | In order to assess residual bearing capacity of concrete-filled steel tubular （CFST） members after high temperature subjected to biaxial force and bending, their behaviors were analyzed from numerical simulation, experimental study and theory analysis in this paper. Numerical analytical procedure was verified by experiment results of 16 CFST specimens subjected to biaxial eccentric compression. Damage coefficient of beating capacity （ kr） was defined and the main factors of influencing kr were analyzed. The representation of kr was obtained by regressed analysis. Combined the theoretical analysis with formula at ambient temperature,a simplified formula was obtained, which could analyze the beating capacity for rectangular CFST members after high temperature subjected to biaxial force and bending. Finally, a comparison was made among the simplified formula, experimental results and numerical analysis, and the results show that they are in a good agreement. This implies that the proposed simplified formula is efficient and it provides a technical foundation for assessment residual behavior and retrofitting of post-fire CFST members. |
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| Keywords: | square concrete-filled steel tube high temperature biaxial eccentric compression damage coefficient of beating capacity |
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