漩口中学典型框架结构震害模拟与分析
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摘要
该文以汶川地震震中附近的漩口中学教学楼和办公楼框架结构震害为背景,对其进行了模拟分析。针对震害特征,提出了微观-宏观多尺度有限元分析模型,以更准确的模拟结构的实际震害。在此基础上,为提高计算分析效率,结合微观-宏观多尺度有限元分析模型,提出能考虑楼板影响和基础转动的改进宏观有限元分析模型。采用多尺度模型和改进的宏观模型,用弹塑性动力时程分析模拟了漩口中学教学楼和办公楼框架结构的倒塌过程,对其倒塌模式、倒塌机理及其影响因素进行了分析比较,找出了影响结构抗倒塌能力的关键部位,为改进框架结构抗震倒塌能力设计提供了参考。
The seismic damage of typical reinforced concrete(RC) frames based on the classroom buildings and office buildings of the Xuankou School,which are close to the epicenter of Wenchuan Earthquake,is simulated and analyzed.According to the seismic damage characters,a micro-macro multi-scale finite element(FE) model is proposed to accurately simulate the seismic damage of the structures.Based on the multi-scale FE model,an improved macro FE model considering the influence of slabs and footing rotations is proposed to improve the computational efficiency.With the micro-macro multi-scale FE model and the improved macro FE model,the collapse process of classroom buildings and office buildings is simulated with elastic-plastic time-history analysis.By comparing the collapse modes and failure mechanisms of the structures,critical positions that influence seismic collapse resistance of a structure are found,which could be used for a reference for the improvement of seismic collapse prevention design of RC frame structures.
The seismic damage of typical reinforced concrete(RC) frames based on the classroom buildings and office buildings of the Xuankou School,which are close to the epicenter of Wenchuan Earthquake,is simulated and analyzed.According to the seismic damage characters,a micro-macro multi-scale finite element(FE) model is proposed to accurately simulate the seismic damage of the structures.Based on the multi-scale FE model,an improved macro FE model considering the influence of slabs and footing rotations is proposed to improve the computational efficiency.With the micro-macro multi-scale FE model and the improved macro FE model,the collapse process of classroom buildings and office buildings is simulated with elastic-plastic time-history analysis.By comparing the collapse modes and failure mechanisms of the structures,critical positions that influence seismic collapse resistance of a structure are found,which could be used for a reference for the improvement of seismic collapse prevention design of RC frame structures.
引文
[1]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 of Tsinghua UniversityXinan Jiaotong University,Beijing Jiaotong UniversityAnalysis on building seismic damage in WenchuanEarthquake[J].Journal of Building Structures,200829(4):1―9.(in Chinese)
[2]林旭川,潘鹏,叶列平,陆新征,赵世春.汶川地震中典型RC框架的震害仿真与分析[J].土木工程学报,2009,42(5):13―20.Lin Xuchuan,Pan Peng,Ye Lieping,Lu Xinzheng,ZhaoShichun.Analysis on damage mechanism of a typical RCframe in Wenchuan Earthquake[J].China CivilEngineering Journal,2009,42(5):13―20.(in Chinese)
[3]GB 50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.GB50011-2001,Code for seismic design of buildings[S].Beijing:China Building Industry Press,2001.(inChinese)
[4]叶列平,李易,潘鹏.漩口中学建筑震害调查分析[J].建筑结构,2009,39(11):54―57.Ye Lieping,Li Yi,Pan Peng.Investigation of the seismicdamages of building structures of Xuankou MiddleSchool in Yinxiu Town[J].Building Structure,2009,39(11):54―57.(in Chinese)
[5]孙柏涛,闫培雷,张明宇,胡春峰.汶川8.0级大地震极重灾区映秀镇不同建筑结构震害概述及原因简析[J].地震工程与工程振动,2008,28(5):1―9.Sun Baitao,Yan Peilei,Zhang Mingyu,Hu Chunfeng.Overview on seismic damage to different structures inYingxiu Town during Wenchuan Earthquake[J].Journalof Earthquake Engineering and Engineering Vibration,2008,28(5):1―9.(in Chinese)
[6]叶列平,陆新征,赵世春,李易.框架结构抗地震倒塌能力的研究——汶川地震极震区几个框架结构震害案例的分析[J].建筑结构学报,2009,30(9):67―76.Ye Lieping,Lu Xinzheng,Zhao Shichun,Li Yi.Seismiccollapse resistance of RC frame structures——Casestudies on seismic damages of several RC framestructures under extreme ground motion in WenchuanEarthquake[J].Journal of Building Structures,2009,30(6):67―76.(in Chinese)
[7]GB50010-2002,混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.GB50010-2002,Code for design of concrete structure[S].Beijing:China Building Industry Press,2002.(inChinese)
[8]Spacone E,Filippou F,Taucer F.Fiber beam-columnmodeling for non-linear analysis of R/C frames[J].Journal of Earthquake Engineering and StructuralDynamics,1996,25(7):711―725.
[9]叶列平,陆新征,马千里,汪训流,缪志伟.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II):131―140.Ye Lieping,Lu Xinzheng,Ma Qianli,Wang Xunliu,Miao Zhiwei.Seismic nonlinear analytical models,methods and examples for concrete structures[J].Engineering Mechanics,2006,23(sup.II):131―140.(inChinese)
[10]陆新征,林旭川,叶列平.多尺度有限元建模方法及其应用[J].华中科技大学学报(城市科学版),2008,25(4):76―80.Lu Xinzheng,Lin Xuchuan,Ye Lieping.Multiscalefinite element modeling and its application in structuralanalysis[J].Journal of Huazhong University of Scienceand Technology(Urban Science Edition),2008,25(4):76―80.(in Chinese)
[11]叶列平,曲哲,马千里,林旭川,陆新征,潘鹏.从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52―59.Ye Lieping,Qu Zhe,Ma Qianli,Lin Xuchuan,LuXinzheng,Pan Peng.Study on ensuring the strongcolumn-weak beam mechanism for RC frames based onthe damage analysis in the Wenchuan Earthquake[J].Building Structure,2008,38(11):52―59.(in Chinese)
[12]马千里,叶列平,陆新征,马玉虎.现浇楼板对框架结构柱梁强度比的影响研究[C]//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,北京:中国建筑工业出版社,2008:263―271.Ma Qianli,Ye Lieping,Lu Xinzheng,Ma Yuhu,Influence of cast-in-site floor slabs to the‘column-beam’strength ratio of frame structures[C]//Chen Zhaoyuan,Qian Jiaru.Building seismic damage investigation andrebuilding analysis of Wenchuan Earthquake,Beijing:China Building Industry Press,2008:263―271.(inChinese)
[13]叶列平,马千里,缪志伟.钢筋混凝土框架结构强柱弱梁设计方法的研究[J].工程力学,2010,27(12):102―113.Ye Lieping,Ma Qianli,Miao Zhiwei.Study onweak-beam-strong-column design method of RC framestructures[J].Engineering Mechanics,2010,27(2):102―113.(in Chinese)
[2]林旭川,潘鹏,叶列平,陆新征,赵世春.汶川地震中典型RC框架的震害仿真与分析[J].土木工程学报,2009,42(5):13―20.Lin Xuchuan,Pan Peng,Ye Lieping,Lu Xinzheng,ZhaoShichun.Analysis on damage mechanism of a typical RCframe in Wenchuan Earthquake[J].China CivilEngineering Journal,2009,42(5):13―20.(in Chinese)
[3]GB 50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.GB50011-2001,Code for seismic design of buildings[S].Beijing:China Building Industry Press,2001.(inChinese)
[4]叶列平,李易,潘鹏.漩口中学建筑震害调查分析[J].建筑结构,2009,39(11):54―57.Ye Lieping,Li Yi,Pan Peng.Investigation of the seismicdamages of building structures of Xuankou MiddleSchool in Yinxiu Town[J].Building Structure,2009,39(11):54―57.(in Chinese)
[5]孙柏涛,闫培雷,张明宇,胡春峰.汶川8.0级大地震极重灾区映秀镇不同建筑结构震害概述及原因简析[J].地震工程与工程振动,2008,28(5):1―9.Sun Baitao,Yan Peilei,Zhang Mingyu,Hu Chunfeng.Overview on seismic damage to different structures inYingxiu Town during Wenchuan Earthquake[J].Journalof Earthquake Engineering and Engineering Vibration,2008,28(5):1―9.(in Chinese)
[6]叶列平,陆新征,赵世春,李易.框架结构抗地震倒塌能力的研究——汶川地震极震区几个框架结构震害案例的分析[J].建筑结构学报,2009,30(9):67―76.Ye Lieping,Lu Xinzheng,Zhao Shichun,Li Yi.Seismiccollapse resistance of RC frame structures——Casestudies on seismic damages of several RC framestructures under extreme ground motion in WenchuanEarthquake[J].Journal of Building Structures,2009,30(6):67―76.(in Chinese)
[7]GB50010-2002,混凝土结构设计规范[S].北京:中国建筑工业出版社,2002.GB50010-2002,Code for design of concrete structure[S].Beijing:China Building Industry Press,2002.(inChinese)
[8]Spacone E,Filippou F,Taucer F.Fiber beam-columnmodeling for non-linear analysis of R/C frames[J].Journal of Earthquake Engineering and StructuralDynamics,1996,25(7):711―725.
[9]叶列平,陆新征,马千里,汪训流,缪志伟.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II):131―140.Ye Lieping,Lu Xinzheng,Ma Qianli,Wang Xunliu,Miao Zhiwei.Seismic nonlinear analytical models,methods and examples for concrete structures[J].Engineering Mechanics,2006,23(sup.II):131―140.(inChinese)
[10]陆新征,林旭川,叶列平.多尺度有限元建模方法及其应用[J].华中科技大学学报(城市科学版),2008,25(4):76―80.Lu Xinzheng,Lin Xuchuan,Ye Lieping.Multiscalefinite element modeling and its application in structuralanalysis[J].Journal of Huazhong University of Scienceand Technology(Urban Science Edition),2008,25(4):76―80.(in Chinese)
[11]叶列平,曲哲,马千里,林旭川,陆新征,潘鹏.从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52―59.Ye Lieping,Qu Zhe,Ma Qianli,Lin Xuchuan,LuXinzheng,Pan Peng.Study on ensuring the strongcolumn-weak beam mechanism for RC frames based onthe damage analysis in the Wenchuan Earthquake[J].Building Structure,2008,38(11):52―59.(in Chinese)
[12]马千里,叶列平,陆新征,马玉虎.现浇楼板对框架结构柱梁强度比的影响研究[C]//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,北京:中国建筑工业出版社,2008:263―271.Ma Qianli,Ye Lieping,Lu Xinzheng,Ma Yuhu,Influence of cast-in-site floor slabs to the‘column-beam’strength ratio of frame structures[C]//Chen Zhaoyuan,Qian Jiaru.Building seismic damage investigation andrebuilding analysis of Wenchuan Earthquake,Beijing:China Building Industry Press,2008:263―271.(inChinese)
[13]叶列平,马千里,缪志伟.钢筋混凝土框架结构强柱弱梁设计方法的研究[J].工程力学,2010,27(12):102―113.Ye Lieping,Ma Qianli,Miao Zhiwei.Study onweak-beam-strong-column design method of RC framestructures[J].Engineering Mechanics,2010,27(2):102―113.(in Chinese)
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