北京大兴国际机场航站楼大跨度钢结构C5区地震响应分析

北京大兴国际机场航站楼大跨度钢结构C5区为双层网壳结构,结构形式复杂,杆件众多,其抗震性能是设计与分析中的关键问题。对C5区建立有限元模型,首先进行了自振模态分析,初步了解了其动力特性。然后,根据规范合理选择地震波,进行动力时程分析,研究了模型在8度多遇及罕遇地震作用下的动力响应和杆件内力情况。分析结果表明:C5区的自振频率分布十分密集,振型以竖向振动为主且对称出现;在8度多遇地震作用下,整体杆件地震内力系数均处于较低水平,上弦及下弦杆件的地震内力系数稍大,受地震作用影响较大;在8度罕遇地震作用下,上、下弦极少数杆件的应力进入塑性范围,其余杆件的应力均处于弹性范围内,整体塑性发展程度较弱;在8...

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Published inJianzhu Gangjiegou Jinzhan pp. 25 - 30
Main Authors 张爱林, 方浩, 刘学春, 牟俊霖, 束伟农, 朱忠义
Format Journal Article
LanguageChinese
Published Editorial Department of Progress in Steel Building Structures, Tongji University 30.01.2021
Subjects
动力时程分析
双层网壳结构
地震波
抗震性能
自振模态
Online AccessGet full text
ISSN1671-9379
DOI10.13969/j.cnki.cn31-1893.2021.01.004

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Abstract 北京大兴国际机场航站楼大跨度钢结构C5区为双层网壳结构,结构形式复杂,杆件众多,其抗震性能是设计与分析中的关键问题。对C5区建立有限元模型,首先进行了自振模态分析,初步了解了其动力特性。然后,根据规范合理选择地震波,进行动力时程分析,研究了模型在8度多遇及罕遇地震作用下的动力响应和杆件内力情况。分析结果表明:C5区的自振频率分布十分密集,振型以竖向振动为主且对称出现;在8度多遇地震作用下,整体杆件地震内力系数均处于较低水平,上弦及下弦杆件的地震内力系数稍大,受地震作用影响较大;在8度罕遇地震作用下,上、下弦极少数杆件的应力进入塑性范围,其余杆件的应力均处于弹性范围内,整体塑性发展程度较弱;在8度多遇及罕遇地震作用下,结构的层间位移角、剪重比等指标均满足规范要求。总体来说,结构在8度多遇及罕遇地震作用下能实现"小震不坏、大震不倒"的抗震设防水准要求,抗震性能良好。
AbstractList 北京大兴国际机场航站楼大跨度钢结构C5区为双层网壳结构,结构形式复杂,杆件众多,其抗震性能是设计与分析中的关键问题。对C5区建立有限元模型,首先进行了自振模态分析,初步了解了其动力特性。然后,根据规范合理选择地震波,进行动力时程分析,研究了模型在8度多遇及罕遇地震作用下的动力响应和杆件内力情况。分析结果表明:C5区的自振频率分布十分密集,振型以竖向振动为主且对称出现;在8度多遇地震作用下,整体杆件地震内力系数均处于较低水平,上弦及下弦杆件的地震内力系数稍大,受地震作用影响较大;在8度罕遇地震作用下,上、下弦极少数杆件的应力进入塑性范围,其余杆件的应力均处于弹性范围内,整体塑性发展程度较弱;在8度多遇及罕遇地震作用下,结构的层间位移角、剪重比等指标均满足规范要求。总体来说,结构在8度多遇及罕遇地震作用下能实现"小震不坏、大震不倒"的抗震设防水准要求,抗震性能良好。
Author 刘学春
束伟农
方浩
牟俊霖
张爱林
朱忠义
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Snippet 北京大兴国际机场航站楼大跨度钢结构C5区为双层网壳结构,结构形式复杂,杆件众多,其抗震性能是设计与分析中的关键问题。对C5区建立有限元模型,首先进行了自振模态分析,初步...
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SubjectTerms 动力时程分析
双层网壳结构
地震波
抗震性能
自振模态
Title 北京大兴国际机场航站楼大跨度钢结构C5区地震响应分析
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