大跨空间钢结构罕遇地震反应分析
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摘要
以中国浦东干部学院大跨空间钢结构为工程背景,采用三维弹塑性有限元模型对其在罕遇地震作用下进行弹塑性时程分析,得出了大跨空间钢结构在地震作用下的受力变形特点。分析结果表明强震初期的冲击对于大跨空间结构的动力破坏起着重要作用,地震波的选取应必须包括实际强震记录调整后拟和设计反应谱的加速度时程。结构地震反应在水平方向具有明显的变异性,而且这一特点对于结构的抗震设计起到控制作用。
Elasto-piastic time-history analysis of long span steel structures is carried out by taking Cadre Academy of China Pudong as an example under strong earthquakes. 3-D elasto-piastic FEM is proposed to obtain mechanical transmutation characteristic. It is pointed out that in the case of a very strong earthquake the study of the initial transient behavior under the initial violent impact is very important in determining the dynamic failure. Strong ground motion records, which response spectrum is accordance with the designed response spectrum, should be included. Seismic responses show obvious spatial variation in horizontal direction.
Elasto-piastic time-history analysis of long span steel structures is carried out by taking Cadre Academy of China Pudong as an example under strong earthquakes. 3-D elasto-piastic FEM is proposed to obtain mechanical transmutation characteristic. It is pointed out that in the case of a very strong earthquake the study of the initial transient behavior under the initial violent impact is very important in determining the dynamic failure. Strong ground motion records, which response spectrum is accordance with the designed response spectrum, should be included. Seismic responses show obvious spatial variation in horizontal direction.
引文
[1] Kim, Uksun. Seismic behavior of steel joist girder structures. Georgia Institute of Technology,2003
[2]王亚勇．关于设计反应谱、时程法和能量方法的探 讨．建筑结构学报,2000;21(1):21-28
[3]杨溥,李英民,赖明．结构时程分析法输入地震 波的选择控制指标．土木工程学报,2000;33(6):33 -37
[4]窦立军,雷艳,宫刚．关于时程分析方法的几点 建议．工程力学增刊,2001:346-350
[5]翁大根,徐植信．对上海市抗震设计反应谱及时程 曲线的认识．地震工程与工程振动,2001;21(1):79 -83
[6]上海市工程建设规范．建筑抗震设计规程．
[7]李田．结构时程动力分析中的阻尼取值研究．土 木工程学报,1997;30(3):68-73
[8] Shinji Tanimura, Koji Mimura. Dynamic failure of structure due to the great Hanshin-Awaji earthquake, International Journal of Impact Engineering, 2000; (24):583-596
[2]王亚勇．关于设计反应谱、时程法和能量方法的探 讨．建筑结构学报,2000;21(1):21-28
[3]杨溥,李英民,赖明．结构时程分析法输入地震 波的选择控制指标．土木工程学报,2000;33(6):33 -37
[4]窦立军,雷艳,宫刚．关于时程分析方法的几点 建议．工程力学增刊,2001:346-350
[5]翁大根,徐植信．对上海市抗震设计反应谱及时程 曲线的认识．地震工程与工程振动,2001;21(1):79 -83
[6]上海市工程建设规范．建筑抗震设计规程．
[7]李田．结构时程动力分析中的阻尼取值研究．土 木工程学报,1997;30(3):68-73
[8] Shinji Tanimura, Koji Mimura. Dynamic failure of structure due to the great Hanshin-Awaji earthquake, International Journal of Impact Engineering, 2000; (24):583-596
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