多维地震输入下首都机场航站楼T3反应谱分析
|
摘要
首都机场航站楼(T3)下部为混凝土和钢混合框架,上部为复杂的双曲面形双层扁网壳,长960 m,宽780 m,为超大体量大跨度复杂空间钢结构体系。本文采用SAP2000有限元软件,对其进行了单维和多维地震输入下的反应谱分析,研究了单维和多维地震输入对构件内力、节点位移和地震总剪力的影响;研究了多维地震输入下地震响应值与按规范地震组合公式计算所得地震响应值的关系;研究了模态提取数目和质量参与系数的关系,CQC法中参与组合的模态数目与结构地震响应的关系。研究表明,采用振型分解反应谱法时,模态频率越高,对结构内力的影响越小,对于对结构影响较小的高频模态,可以忽略其对结构的影响;根据单维和多维地震反应的对比分析,对超大跨度复杂钢结构宜进行三维地震输入的反应谱分析。另外,本文提出了一种新的地震效应组合方法,可替代多维地震反应分析,并弥补现行规范的不足。
The terminal building of Beijing Capital Airport(T3),a super large long-span complex spacial steel structure,is made up of steel frame and double-layer reticulated shell,which is 960m long and 780m wide.Response spectrum analysis is conducted for it by using SAP2000 finite element software.The influences of one-dim ensional and multi-dimensional earthquake input on the element force,the joint displacement and the total earthquake shearing force are analyzed.The relationship between seismic response under multi-dimensional earthquake input and that calculated by Chinese Earthquake Criterion combination formula is studied.The relationship between the number of modes and modal participating mass ratio,and the relationship between the number of modes used in CQC method and the seismic response of structure are investigated.These researches show that the influence of high frequency modes on the structure internal force is little and could be ignored.According to the comparison befween the seismic response under one-dimensional and multi-dimensional earthquake input,the response spectrum analysis under multi-dimensional earthquake input should be conducted for the super large long-span complex spacial steel structure.In addition,this paper provides a new method of earthquake combination,which can substitute the multi-dimensional earthquake analysis and make up the deficiencies of the current specifications.
The terminal building of Beijing Capital Airport(T3),a super large long-span complex spacial steel structure,is made up of steel frame and double-layer reticulated shell,which is 960m long and 780m wide.Response spectrum analysis is conducted for it by using SAP2000 finite element software.The influences of one-dim ensional and multi-dimensional earthquake input on the element force,the joint displacement and the total earthquake shearing force are analyzed.The relationship between seismic response under multi-dimensional earthquake input and that calculated by Chinese Earthquake Criterion combination formula is studied.The relationship between the number of modes and modal participating mass ratio,and the relationship between the number of modes used in CQC method and the seismic response of structure are investigated.These researches show that the influence of high frequency modes on the structure internal force is little and could be ignored.According to the comparison befween the seismic response under one-dimensional and multi-dimensional earthquake input,the response spectrum analysis under multi-dimensional earthquake input should be conducted for the super large long-span complex spacial steel structure.In addition,this paper provides a new method of earthquake combination,which can substitute the multi-dimensional earthquake analysis and make up the deficiencies of the current specifications.
引文
[1]董石麟.我国大跨度空间钢结构的发展与展望[J].空间结构,2000,6(2):3-13.
[2]林家浩,张亚辉,赵岩.大跨度结构抗震分析方法及近期进展[J].力学进展,2001,31(3):350-360.
[3]莫扎.马加迪.北京首都国际机场3号航站楼设计[J].建筑创作,2004.6:112-120.
[4]李杰,李建华.多点激励下结构随机地震反应分析的反应谱方法[J].地震工程与工程振动,2004,24(3):21-29.
[5]史志利,李忠献.随机地震动场多点激励下大跨度桥梁地震反应分析方法[J].地震工程与工程振动,2003,23(4):124-130.
[6]刘季.在多维地震动复合作用下结构的反应和建筑结构扭转地震效应[J].哈尔滨建筑工程学院学报,1986,19(2):59-71.
[7]刘季.结构多维地震反应的组合问题[J].哈尔滨建工学院学报,1987,20(2):1-9.
[8]刘季,黄玉平.双向水平地震动作用下结构反应的组合方法[C]//第二届全国地震工程会议论文集,1987:21-25.
[9]王君杰.地面转动及地面转动和多点输入下结构的地震反应[D].哈尔滨:哈尔滨国家地震局工程力学研究所,1988.
[10]Wilson E L,Kiureghian AD,Bayo E P.Areplacement for SRSS method in seismic analysis[J].Earthquake Engineering and Structural Dynam-ics,1981,9:187-192.
[11]GB 50017-2003,抗震设计规范[S].北京:中国建筑工业出版社,2003.28-36.
[12]JGJ61-2003,网壳结构技术规程[S].北京:中国建筑工业出版社,2003.20-25.
[2]林家浩,张亚辉,赵岩.大跨度结构抗震分析方法及近期进展[J].力学进展,2001,31(3):350-360.
[3]莫扎.马加迪.北京首都国际机场3号航站楼设计[J].建筑创作,2004.6:112-120.
[4]李杰,李建华.多点激励下结构随机地震反应分析的反应谱方法[J].地震工程与工程振动,2004,24(3):21-29.
[5]史志利,李忠献.随机地震动场多点激励下大跨度桥梁地震反应分析方法[J].地震工程与工程振动,2003,23(4):124-130.
[6]刘季.在多维地震动复合作用下结构的反应和建筑结构扭转地震效应[J].哈尔滨建筑工程学院学报,1986,19(2):59-71.
[7]刘季.结构多维地震反应的组合问题[J].哈尔滨建工学院学报,1987,20(2):1-9.
[8]刘季,黄玉平.双向水平地震动作用下结构反应的组合方法[C]//第二届全国地震工程会议论文集,1987:21-25.
[9]王君杰.地面转动及地面转动和多点输入下结构的地震反应[D].哈尔滨:哈尔滨国家地震局工程力学研究所,1988.
[10]Wilson E L,Kiureghian AD,Bayo E P.Areplacement for SRSS method in seismic analysis[J].Earthquake Engineering and Structural Dynam-ics,1981,9:187-192.
[11]GB 50017-2003,抗震设计规范[S].北京:中国建筑工业出版社,2003.28-36.
[12]JGJ61-2003,网壳结构技术规程[S].北京:中国建筑工业出版社,2003.20-25.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心