楼梯对教学楼框架抗震性能的影响
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摘要
设计了包含各种楼梯布置和不包含楼梯的两类典型钢筋混凝土教学楼框架计算模型,采用模态分析法、反应谱法对各模型进行了弹性阶段地震反应特性对比计算分析,选择性的进行了pushover分析。结果显示:楼梯参与结构整体计算后,结构抗侧移刚度增加、结构扭转振动显著、梯间框架部分梁柱内力成倍增大等现象;楼梯的不同布置对结构抗震性能有重要影响,存在较为合理的楼梯布置;楼梯的存在也使整体结构塑性铰分布更合理,但楼梯则成了最薄弱环节。
Two typical school buildings of concrete frame with staircases are made,and 18 computing models are established for comparison.the seismic performance of the computing models in elastic phase is calculated by adopting modal analysis method,response spectrum analysis based on SAP2000;the pushover analysis method is also used to discuss the seismic performance of some computing models in elastic-plastic phase based on SAP2000.The results show that the existence of staircases and the arrangement of staircases significantly affect the lateral stiffness,dynamic performance,the peak internal forces,the peak storey drifts and plastic hinge distribution of frame structure.These can be used as necessary references for the construction and strengthening of school building of frame structure.
Two typical school buildings of concrete frame with staircases are made,and 18 computing models are established for comparison.the seismic performance of the computing models in elastic phase is calculated by adopting modal analysis method,response spectrum analysis based on SAP2000;the pushover analysis method is also used to discuss the seismic performance of some computing models in elastic-plastic phase based on SAP2000.The results show that the existence of staircases and the arrangement of staircases significantly affect the lateral stiffness,dynamic performance,the peak internal forces,the peak storey drifts and plastic hinge distribution of frame structure.These can be used as necessary references for the construction and strengthening of school building of frame structure.
引文
[1]Xiong Z H.Lessons Learned From WenChuanEarthquake:To improve the seismic desigh of schoolbuildings[A].The 14th World Conference on EarthquakeEngineering[C],Oct.12-17,2008,Beijing,China
[2]《汶川地震建筑震害调查与灾后重建分析报告》编委会.汶川地震建筑震害调查与灾后重建分析报告[M].北京:中国建筑工业出版社,2008Editorial Committee of Analytical Reports About DisasterInvestigation and Reconstruction of Architecture Subiectedto Wenchuan Earthquake.Analytical Reports AboutDisaster Investigation and Reconstruction of ArchitectureSubjected to Wenchuan Earthquake[M].Beijing:ChinaArchitecture and Building Press,2008(in Chinese).
[3]GB 50011-2001,建筑抗震设计规范(2008版)[S]GB 50011-2001,Code for Seismic Design of Buildings(version 2008)[S](in Chinese)
[4]曹万林,庞国新,李云霄.带楼梯框架弹性层刚度的试验研究[J].世界地震工程,1996(2):29～32Cao Wan-lin,Pang Guo-xin,Li Yun-xiao.The TestResearch on Elastic Floor Rigidity of Frame with Staircase[J].World Information on Earthquake Engineering,1996,(2):29～32(in Chinese)
[5]曹万林,庞国新,李云霄.带楼梯框架弹塑性工作性能研究[J].世界地震工程,1996,(3):52-56.Cao Wan-lin,Pang Guo-xin,Li Yun-xiao.Research onElastoplastic Performance of Frames with Staircases[J].World Information on Earthquake Engineering,1996,(3):52～56(in Chinese)
[6]曹万林,胡国振.钢筋混凝土框架与楼梯共同工作性能试验研究[J].工程力学,1999(增刊):023～026Cao Wan-lin,Hu Guo-zhen.Test Research onPerformance of Interactions Between RC Frames andStaircases[J].Engineering Mechanics,1999,16(S2):23～26(in Chinese)
[7]王奇,马宝民.钢筋混凝土现浇楼梯对整体结构的影响[J].建筑结构,2002,32(4):27～29Wang Qi,Ma Bao-ming.The effects of cast-in-placestaircases on the structural stiffness and internal forces[J].Building Structures,2002,32(4):27～29(inChinese)
[8]焦柯,吴文勇,黄真康,等.楼梯参与结构整体工作的计算分析[J].广东土木与建筑,2009,3:3～6Jiao Ke,Wu Wen-yong,Huang Zhen-kang,et al.Structural Analysis of Staircase Participated in theWorking of Building Structure[J].GuangdongArchitecture Civil Engineering,2009,3:3～6(inChinese)
[9]任彧.楼梯系统对框架抗震性能的影响[J].福建建筑,2009(3):42～44Ren Yu.Seismic Analysis of the RC Frame StructureConsidering the Influence of Stair Element[J].FujianArchitecture and Construction,2009,(3):42～44(inChinese)
[2]《汶川地震建筑震害调查与灾后重建分析报告》编委会.汶川地震建筑震害调查与灾后重建分析报告[M].北京:中国建筑工业出版社,2008Editorial Committee of Analytical Reports About DisasterInvestigation and Reconstruction of Architecture Subiectedto Wenchuan Earthquake.Analytical Reports AboutDisaster Investigation and Reconstruction of ArchitectureSubjected to Wenchuan Earthquake[M].Beijing:ChinaArchitecture and Building Press,2008(in Chinese).
[3]GB 50011-2001,建筑抗震设计规范(2008版)[S]GB 50011-2001,Code for Seismic Design of Buildings(version 2008)[S](in Chinese)
[4]曹万林,庞国新,李云霄.带楼梯框架弹性层刚度的试验研究[J].世界地震工程,1996(2):29～32Cao Wan-lin,Pang Guo-xin,Li Yun-xiao.The TestResearch on Elastic Floor Rigidity of Frame with Staircase[J].World Information on Earthquake Engineering,1996,(2):29～32(in Chinese)
[5]曹万林,庞国新,李云霄.带楼梯框架弹塑性工作性能研究[J].世界地震工程,1996,(3):52-56.Cao Wan-lin,Pang Guo-xin,Li Yun-xiao.Research onElastoplastic Performance of Frames with Staircases[J].World Information on Earthquake Engineering,1996,(3):52～56(in Chinese)
[6]曹万林,胡国振.钢筋混凝土框架与楼梯共同工作性能试验研究[J].工程力学,1999(增刊):023～026Cao Wan-lin,Hu Guo-zhen.Test Research onPerformance of Interactions Between RC Frames andStaircases[J].Engineering Mechanics,1999,16(S2):23～26(in Chinese)
[7]王奇,马宝民.钢筋混凝土现浇楼梯对整体结构的影响[J].建筑结构,2002,32(4):27～29Wang Qi,Ma Bao-ming.The effects of cast-in-placestaircases on the structural stiffness and internal forces[J].Building Structures,2002,32(4):27～29(inChinese)
[8]焦柯,吴文勇,黄真康,等.楼梯参与结构整体工作的计算分析[J].广东土木与建筑,2009,3:3～6Jiao Ke,Wu Wen-yong,Huang Zhen-kang,et al.Structural Analysis of Staircase Participated in theWorking of Building Structure[J].GuangdongArchitecture Civil Engineering,2009,3:3～6(inChinese)
[9]任彧.楼梯系统对框架抗震性能的影响[J].福建建筑,2009(3):42～44Ren Yu.Seismic Analysis of the RC Frame StructureConsidering the Influence of Stair Element[J].FujianArchitecture and Construction,2009,(3):42～44(inChinese)
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