区域火灾作用后框架结构的抗震性能分析
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摘要
建筑物遭受火灾作用后,不同部位构件的损伤将导致结构整体性能会有不同程度的下降,对结构的抗震性能也有显著的影响。目前,关于火灾后建筑物的受损研究,主要集中在对梁、柱等单个构件上,对于结构的整体抗震性能研究比较少。文章以常见的三维空间杆系模型为基础,利用等效截面法估算结构构件受火后剩余承载力;采用SAP2000有限元分析软件进行建模计算,对比分析区域火灾作用后框架结构整体抗震性能的变化,总结不同区域楼层梁、柱构件分别受火对结构整体抗震性能的影响,为结构加固设计提供依据。
After being exposed to fire,the different level damage of structural members at different locations would suffer different deteriarations of structural performance,as a result,the seismic performance of the structure is influenced.So far,the research work about evaluating the after-fire performance of structures focus only on structural members such as beams and columns,little work has been done to evaluate the seismic performance of whole structure.With the common three-dimensional truss structural mode.This paper estimated the after-fire capacity of structures though equivalent section method.Then,with the object of summarizing the effect of fire suffered by structural members at different locations on the seismic performance of whole structure,the finite element analysis software sap2000 was used to compare and analyze the change of the seismic performance when the structure suffered local fire.
After being exposed to fire,the different level damage of structural members at different locations would suffer different deteriarations of structural performance,as a result,the seismic performance of the structure is influenced.So far,the research work about evaluating the after-fire performance of structures focus only on structural members such as beams and columns,little work has been done to evaluate the seismic performance of whole structure.With the common three-dimensional truss structural mode.This paper estimated the after-fire capacity of structures though equivalent section method.Then,with the object of summarizing the effect of fire suffered by structural members at different locations on the seismic performance of whole structure,the finite element analysis software sap2000 was used to compare and analyze the change of the seismic performance when the structure suffered local fire.
引文
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[8]Mostafaei H,Frank J.Vecchio,and N.Benichou,Seismic Resistanace of Fire-Damaged ReinforcedConcrete Columns[C].ATC&SEI2009 Conference onImproving the Seismic Performance of ExistingBuildings and Other Structures,2009:1396-1407.
[9]谢猛,肖建庄.混凝土结构抗火理论研究述评[J].结构工程师,2005(1):57-61.Xie M,Xiao J Z.Theoretical study on fire-resistanceof concrete structures-an overview[J].StructuralEngineers,2005,(1):57-61.(in Chinese)
[10]王广勇,傅传国,薛素铎.局部火灾作用下混凝土框架结构性能分析[J].山东建筑大学学报,2008,23(2):105-111.Wang G Y,Fu C G,Xue S D.Behavior of reinforcedconcrete frames in local fire[J].Journal of ShandongJianzhu University,2008,23(2):105-111.(inChinese)
[2]吴波,马忠诚,欧进萍.高温后混凝土变形特性及本构关系的试验研究[J].建筑结构学报,1999,20(5):42-49.Wu B,Ma Z C,Ou J P.Experimental research ondeformation and constitutive relationship of concreteunder axial loading and high temperature[J].Journalof Building Structures,1999,20(5):42-49.(inChinese)
[3]吴波,马忠诚,欧进萍.火灾后钢筋混凝土结构的抗震性能研究[J].哈尔滨建筑大学学报,1996,29(1):9-16.Wu B,Ma Z C,Ou J P.Study on the aseismiccharacteristics of RC structures after fire[J].Journalof Harbin University of Cival Engineering andArchitecture,1996,29(1):9-16.(in Chinese)
[4]吴波,马忠诚,欧进萍.高温后钢筋混凝土柱抗震性能的试验研究[J].土木工程学报,1999,32(2):53-58.Wu B,Ma Z C,Ou J P.Experimental study on seismicproperties of RC columns after high temperature[J].China Civil Engineering Journal,1999,32(2):53-58.(in Chinese)
[5]黄奕辉.钢筋混凝土框架结构火灾后的地震分析[J].华侨大学学报(自然科学版),1997,18(4):381-384.Huang Y H.Seismic analysis of reinforced concreteframe structure after fire[J].Journal of HuaqiaoUniversity(Natural Science),1997,18(4):381-384.(in Chinese)
[6]路春林,屈立军,薛武平,等.建筑结构耐火设计[M].北京:中国建筑工业出版社,1995.Lu C L,Qu L J,Xue W P,et al.The Fireproof Designof the Building Constructions[M].Beijing:ChinaArchitecture and Building Press,1995.(in Chinese)
[7]过镇海,时旭东.钢筋混凝土的高温性能及其计算[M].北京:清华大学出版社,2002.Guo Z H,Shi X D.Behaviour of Reinforced Concreteat Elevated Temperature and its Calculation[M].Beijing:Tsinghua University Press,2002.(inChinese)
[8]Mostafaei H,Frank J.Vecchio,and N.Benichou,Seismic Resistanace of Fire-Damaged ReinforcedConcrete Columns[C].ATC&SEI2009 Conference onImproving the Seismic Performance of ExistingBuildings and Other Structures,2009:1396-1407.
[9]谢猛,肖建庄.混凝土结构抗火理论研究述评[J].结构工程师,2005(1):57-61.Xie M,Xiao J Z.Theoretical study on fire-resistanceof concrete structures-an overview[J].StructuralEngineers,2005,(1):57-61.(in Chinese)
[10]王广勇,傅传国,薛素铎.局部火灾作用下混凝土框架结构性能分析[J].山东建筑大学学报,2008,23(2):105-111.Wang G Y,Fu C G,Xue S D.Behavior of reinforcedconcrete frames in local fire[J].Journal of ShandongJianzhu University,2008,23(2):105-111.(inChinese)
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