丙类与乙类设防RC框架结构抗地震倒塌能力对比
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摘要
按照GB 50011—2001《建筑抗震设计规范》6～8.5度的丙类与乙类设防要求分别设计了10个典型RC框架结构算例,采用基于动力增量时程分析(IDA)地震倒塌易损性分析方法得到了各算例结构在遭遇罕遇地震和特大地震时的倒塌率,据此对不同设防烈度的丙类和乙类RC框架结构的抗地震倒塌能力进行了评价分析。研究指出,结构的抗倒塌能力需根据结构的绝对抗震能力和相对地震动强度来进行评价。分析结果表明,对于6～7.5度抗震设防的结构,因其绝对抗震能力偏低,抗震设防烈度仅由丙类提高到乙类,其在遭遇特大地震时的抗地震倒塌能力仍较差,需采取进一步的措施增强其抗震能力。
According to the GB 50011—2001'Code for seismic design of buildings',10 typical reinforced concrete(RC) frames were designed with different seismic fortification levels(from 6 to 8.5) and different fortification categories(B and C).The collapse resistances of the frames were evaluated quantitatively with collapse fragility analysis that was based on incremental dynamic analysis(IDA).The collapse resistances of frames with seismic fortification categories B and C were compared.The results show that the collapse resistances of structures should be evaluated in accordance with both the actual seismic resistance and the corresponding design intensity.For frames with seismic fortification level 6 to 7.5,since their actual aseismic resistances are relatively weak,their collapse resistances are insufficient when their seismic fortification categories are upgraded from B to C.So further measures are needed to enhance these structures.
According to the GB 50011—2001'Code for seismic design of buildings',10 typical reinforced concrete(RC) frames were designed with different seismic fortification levels(from 6 to 8.5) and different fortification categories(B and C).The collapse resistances of the frames were evaluated quantitatively with collapse fragility analysis that was based on incremental dynamic analysis(IDA).The collapse resistances of frames with seismic fortification categories B and C were compared.The results show that the collapse resistances of structures should be evaluated in accordance with both the actual seismic resistance and the corresponding design intensity.For frames with seismic fortification level 6 to 7.5,since their actual aseismic resistances are relatively weak,their collapse resistances are insufficient when their seismic fortification categories are upgraded from B to C.So further measures are needed to enhance these structures.
引文
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[12]Applied Technology Council,Federal EmergencyManagement Agency.Quantification of building seismicperformance factors[R].Washington DC,America:FEMA2,008.
[13]叶列平,马千里,缪志伟.结构抗震分析用地震动强度指标的研究[J].地震工程与工程振动,2009,29(4):9-22.(Ye Lieping,Ma Qianli,Miao Zhiwei.Study on earthquake intensities for seismic analysis ofstructures[J].Journal of Earthquake Engineering andEngineering Vibration,2009,29(4):9-22.(inChinese))
[14]施炜,叶列平,陆新征,等.不同抗震设防RC框架结构抗倒塌能力研究[J].工程力学,2011,28(3):41-48.(Shi Wei,Ye Lieping,Lu Xinzheng,et al.Studyon the collapse-resistant capacity of RC frames withdifferent seismic fortification levels[J].EngineeringMechanics,2011,28(3):41-48.(in Chinese))
[15]唐代远,陆新征,叶列平,等.柱轴压比对我国RC框架结构抗地震倒塌能力的影响[J].工程抗震与加固改造,2010,32(5):26-35.(Tang Daiyuan,LuXinzheng,Ye Lieping,et al.Influence of axialcompression ratio to the seismic collapse resistance ofRC frame structures[J].Earthquake ResistantEngineering and Retrofitting,2010,32(5):26-35.(inChinese))
[16]《汶川地震震害地图集》编纂委员会.汶川地震震害地图集[M].成都:成都地图出版社,2008.(Compilation Committee of Atlas of WenchuanEarthquake Disaster.Atlas of Wenchuan earthquakedisaster[M].Chengdu:Chengdu CartographicPublishing House,2008.(in Chinese))
[17]陶夏新.我国新的地震区划编图和中国地震烈度区划图(1990)[J].自然灾害学报,19921,(1):99-109.(Tao Xiaxin.On the new national seismic zonation andthe seismic intensity zoning map of China(1990)[J].Journal of Natural Disasters,1992,1(1):99-109.(inChinese))
[2]王亚勇.汶川地震建筑震害启示:三水准设防和抗震设计基本要求[J].建筑结构学报,2008,29(4):26-33.(WANG Yayong.Lessons learnt from buildingdamages in the Wenchuan earthquake:three earthquakeperformance objectives and basic requirements forseismic design of buildings[J].Journal of BuildingStructures,2008,29(4):26-33.(in Chinese))
[3]清华大学、西南交通大学、北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.(Civil and Structural Groups ofTsinghua University,Southwest Jiaotong University andBeijing Jiaotong University.Analysis on buildingseismic damage in Wenchuan earthquake[J].Journalof Building Structures,2008,29(4):1-9.(inChinese))
[4]陈肇元,钱稼茹.汶川地震建筑震害调查与灾后重建分析报告[R].北京:中国建筑工业出版社,2008.
[5]GB 50023—2008建筑工程抗震设防分类标准[S].北京:中国建筑工业出版社,2008.(GB 50023—2008 Standard for classification of seismic protectionof building constructions[S].Beijing:ChinaArchitecture&Building Press,2008.(in Chinese))
[6]叶列平,曲哲,陆新征,等.提高建筑结构的抗地震倒塌能力的设计思想与方法[J].建筑结构学报,2008,29(4):42-50.(YE Lieping,QU Zhe,LUXinzheng,et al.Collapse prevention of buildingstructures:a lesson from the Wenchuan earthquake[J].Journal of Building Structures,20082,9(4):42-50.(in Chinese))
[7]叶列平,陆新征,赵世春,等.框架结构抗地震倒塌能力的研究[J].建筑结构学报,2009,30(6):67-76.(YE Lieping,LU Xinzheng,ZHAO Shichun,et al.Seismic collapse resistance of RC frame structures[J].Journal of Building Structures,2009,30(6):67-76.(in Chinese))
[8]Légeron F,Paultre P.Uniaxial confinement model fornormal and high-strength concrete columns[J].Journalof Structural Engineering,ASCE,2005,129(2):241-252.
[9]陆新征,叶列平,缪志伟.建筑抗震弹塑性分析[M].北京:中国建筑工业出版社,2009:143-162.(Lu Xinzheng,Ye Lieping,Miao Zhiwei.Elasto-plastic analysis of buildings against earthquake[M].Beijing:China Architecture&Building Press,2009:143-162.(in Chinese))
[10]叶列平,陆新征,马千里,等.混凝土结构抗震非线性分析模型、方法及算例[J].工程力学,2006,23(增刊2):131-140.(Ye Lieping,Lu Xinzheng,MaQianli,et al.Nonlinear analytical models,metheds andexamples for concrete structures subject to earthquakeloading[J].Engineering Mechanics,2006,23(Suppl.2):131-140.(in Chinese))
[11]汪训流,陆新征,叶列平.往复荷载下钢筋混凝土柱受力性能的数值模拟[J].工程力学,2007,24(12):76-81.(Wang Xunliu,Lu Xinzheng,YeLieping.Numerical simulation for the hysteresisbehavior of RC columns under cyclic loads[J].Engineering Mechanics,2007,24(12):76-81.(inChinese))
[12]Applied Technology Council,Federal EmergencyManagement Agency.Quantification of building seismicperformance factors[R].Washington DC,America:FEMA2,008.
[13]叶列平,马千里,缪志伟.结构抗震分析用地震动强度指标的研究[J].地震工程与工程振动,2009,29(4):9-22.(Ye Lieping,Ma Qianli,Miao Zhiwei.Study on earthquake intensities for seismic analysis ofstructures[J].Journal of Earthquake Engineering andEngineering Vibration,2009,29(4):9-22.(inChinese))
[14]施炜,叶列平,陆新征,等.不同抗震设防RC框架结构抗倒塌能力研究[J].工程力学,2011,28(3):41-48.(Shi Wei,Ye Lieping,Lu Xinzheng,et al.Studyon the collapse-resistant capacity of RC frames withdifferent seismic fortification levels[J].EngineeringMechanics,2011,28(3):41-48.(in Chinese))
[15]唐代远,陆新征,叶列平,等.柱轴压比对我国RC框架结构抗地震倒塌能力的影响[J].工程抗震与加固改造,2010,32(5):26-35.(Tang Daiyuan,LuXinzheng,Ye Lieping,et al.Influence of axialcompression ratio to the seismic collapse resistance ofRC frame structures[J].Earthquake ResistantEngineering and Retrofitting,2010,32(5):26-35.(inChinese))
[16]《汶川地震震害地图集》编纂委员会.汶川地震震害地图集[M].成都:成都地图出版社,2008.(Compilation Committee of Atlas of WenchuanEarthquake Disaster.Atlas of Wenchuan earthquakedisaster[M].Chengdu:Chengdu CartographicPublishing House,2008.(in Chinese))
[17]陶夏新.我国新的地震区划编图和中国地震烈度区划图(1990)[J].自然灾害学报,19921,(1):99-109.(Tao Xiaxin.On the new national seismic zonation andthe seismic intensity zoning map of China(1990)[J].Journal of Natural Disasters,1992,1(1):99-109.(inChinese))
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