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工程力学  2014 

火灾后型钢混凝土柱剩余承载力数值模拟分析

, PP. 91-98

Keywords: 火灾后,型钢混凝土,,温度场,剩余承载力,数值模拟

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Abstract:

利用MSC.MARC软件对火灾后型钢混凝土柱的截面温度场及剩余承载力进行了模拟分析,数值分析结果得到了试验验证。考虑混凝土强度、长细比、含钢率、荷载偏心率、受火时间等参数,利用MSC.MARC软件对ISO834标准火灾作用后型钢混凝土柱剩余承载力进行了进一步计算。计算结果表明,经历ISO834标准火灾作用后,型钢混凝土柱的极限承载力显著降低,在该文参数范围内,承载力降低幅度在8.5%~45.3%变化。定义火灾作用后型钢混凝土柱剩余承载力与常温下型钢混凝土柱极限承载力的比值为火灾后型钢混凝土柱剩余承载力影响系数。数值模拟分析结果表明,混凝土强度、截面含钢率、受火时间对值的影响较大,而长细比、偏心率对值的影响相对较小。在数值计算结果基础上,通过回归分析的方法得到了火灾后型钢混凝土柱剩余承载力影响系数的简化计算公式,公式计算结果与数值模拟分析结果符合较好。

References

[1]  李俊华, 刘明哲, 唐跃峰, 郑荣跃. 火灾后型钢混凝土梁受力性能试验研究[J]. 土木工程学报, 2011, 44(4): 84―90.
[2]  Li Junhua, Liu Mingzhe, Tang Yuefeng, Zheng Rongyue. Experimental study on the mechanical properties of steel reinforced concrete beams after exposure to fire [J]. Chinese Civil Engineering Journal, 2011, 44(4): 84―90. (in Chinese)
[3]  李俊华, 唐跃峰, 刘明哲. 火灾后型钢混凝土柱受力性能试验研究[J]. 建筑结构学报, 2012, 33(2): 56―63.
[4]  Li Junhua, Tang Yuefeng, Liu Mingzhe. Experimental study on mechanical properties of steel reinforced concrete columns after exposure to fire [J]. Journal of Building Structures, 2012, 33(2): 56―63. (in Chinese)
[5]  李俊华, 赵银海, 唐跃峰, 刘明哲. 火灾后型钢混凝土轴压柱剩余承载力试验[J]. 工程力学, 2012, 29(增Ⅰ): 86―91.
[6]  Li Junhua, Zhao Yinhai, Tang Yuefeng, Liu Mingzhe. Experimental study on residual load bearing capacity of SRC columns under axial force after exposure to fire [J]. Engineering Mechanics, 2012, 29(Suppl Ⅰ): 86―91. (in Chinese)
[7]  李国强, 韩林海, 楼国彪, 蒋首超. 钢结构及钢-混凝土组合结构抗火设计[M]. 北京: 中国建筑工业出版社, 2006: 135―140.
[8]  Li Guoqiang, Han Linhai, Lou Guobiao, Jiang Shouchao. Fire design for steel and steel-concrete composite structures [M]. Beijing: China Architecture and Building Press, 2006: 135―140. (in Chinese)
[9]  European Committee for Standardization, ENV 1993-1-2, Eurocode 3, Design of Steel Structures, Part 1.2: Structural Fire Design [S]. 1993.
[10]  European Committee for Standardization, ENV 1994-1-2, Eurocode 4, Design of Steel Structures, Part 1.2: Structural Fire Design [S]. 1994.
[11]  陆洲导. 钢筋混凝土梁对火灾反应的研究[D]. 上海: 同济大学, 1989.
[12]  Lu Zhoudao. Study on the fire reaction of reinforced concrete beams [D]. Shanghai: Tongji University, 1989. (in Chinese)
[13]  李俊华, 俞凯, 邱栋梁, 王国峰. 高温下带栓钉连接件型钢混凝土剪力传递性能研究[J]. 建筑结构学报, 2013, 34(8): 37―45.
[14]  Li Junhua, Yu Kai, Qiu Dongliang, Wang Guofeng. Study on the force transfer behavior of SRC members with stud shear connectors at elevated temperatures [J]. Journal of Building Structures, 2013, 34(8): 37―45. (in Chinese)
[15]  吴波. 火灾后钢筋混凝土结构的力学性能[M]. 北京: 科学出版社, 2003: 59―64.
[16]  Wu Bo. Mechanical performance of reinforced concrete structures after exposure to fire [M]. Beijing: Science Press, 2003: 59―64. (in Chinese)
[17]  唐跃锋. 火灾后型钢混凝土柱性能退化与加固修复研究[D]. 宁波: 宁波大学, 2012.
[18]  Tang Yuefeng. Research on the performance degradation and rehabilitation of steel reinforced concrete columns after exposure to fire [D]. Ningbo: Ningbo University, 2012. (in Chinese)

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