博物馆文物的防震保护研究(二)——设防地震动输入及结构地震动反应
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摘要
通过对上海及邻近地区地震危害性分析,结合地震研究工作结果,根据上海博物馆文物防震保护的具体要求,研究确定了该博物馆文物防震保护的设防水准及地震动参数。场地地震动输入峰值加速度水准确定为50年超越概率3％,地震动反应谱采用上海市标准《建筑抗震设计规范》(DGJ08-9-92)中给出的地震影响系数曲线(阻尼比0.05),并将输入峰值加速度调整为180gal。研究采用了目前通用的拟合反应谱的方法,通过拟合选定的地震动反应标准谱,合成了6条人造地震波时程曲线,拟合精度控制在相对误差不大于5％;同时结合上海市《建筑抗震设计规范》(DGJ08-9-92)中所附的一条强震记录,共同作为上海博物馆结构地震反应分析的输入地震动。又根据上海博物馆建筑的结构特征分析,结合建筑结沟动力特征的实测结果,通过采用层模型结构时程分析计算方法,计算并获得了在遭遇设防地震时,上海博物馆建筑物每一层的地震动反应,表明上海博物馆建筑各楼层的地震动反应具有明显的楼层放大作用。对各楼层地震动反应的统计分析,给出了上海博物馆建筑物每一层的地震动参数,以此可作为今后文物地震危害性分析,及研究设计隔震装置等防震措施的依据。
By analysis of the quake harm for Shanghai and its neighborhood area, combining the results in Shanghai area earthquake researth, according to the real requirements of the cultural relics protection from quake for Shanghai Museum, the fortify level and the motion parameters of the cultural relics protection from quake for museum have been studied and determined. The input acceleration peak level of the site motion input peak acceleration level be determined as the exceed probability 3 % by 50 years, the motion response spectra be adopted by the quake influence coefficient curve (damping ratio 0. 05) from the Shanghai architecture anti -seismic code(DGJ08-9 -92) ,and the motion input peak acceleration be adjusted to 180 gal. In this way,one side the enough safety be provided and another side the quake back- ground of Shanghai Museum building site be considered. Then here adopt the global method by fitting response spectra, ie. by fitting motion response standard spectra selected, synthesized 6 artificial wave time history curves. The fitting precision is to be controlled in 5 % about the relative error. These artificial quake wave histories have the same statistical characteristics, along with one real motion time history in the Shanghai architecture anti ~ seismic code (DGJ08 - 9 - 92) , as the input motion of the structural quake response analysis for Shanghai Museum building. Then according to the analysis of the structural characteristics for Shanghai Museum, combining with the real measurement to the building structure dynamics characteristics, the structure design parameters have been corrected. By the story modal structural time history analysis and computation method, computed and gained the quake motion response at the every floor in the Shanghai Museum building when it encounters the fortify quake. The computational results show that under the action of the fortify quake, the quake motion response is provided with obvious story amplify effect in the every story of the Shanghai Museum building. For the quake motion response by the computation to the every story, work out the statistical analysis and give out the motion parameters for the every story in the Shanghai Museum building. It can be as the basis for the cultural relics quake harm analysis, isolator system design and other protection methods future.
By analysis of the quake harm for Shanghai and its neighborhood area, combining the results in Shanghai area earthquake researth, according to the real requirements of the cultural relics protection from quake for Shanghai Museum, the fortify level and the motion parameters of the cultural relics protection from quake for museum have been studied and determined. The input acceleration peak level of the site motion input peak acceleration level be determined as the exceed probability 3 % by 50 years, the motion response spectra be adopted by the quake influence coefficient curve (damping ratio 0. 05) from the Shanghai architecture anti -seismic code(DGJ08-9 -92) ,and the motion input peak acceleration be adjusted to 180 gal. In this way,one side the enough safety be provided and another side the quake back- ground of Shanghai Museum building site be considered. Then here adopt the global method by fitting response spectra, ie. by fitting motion response standard spectra selected, synthesized 6 artificial wave time history curves. The fitting precision is to be controlled in 5 % about the relative error. These artificial quake wave histories have the same statistical characteristics, along with one real motion time history in the Shanghai architecture anti ~ seismic code (DGJ08 - 9 - 92) , as the input motion of the structural quake response analysis for Shanghai Museum building. Then according to the analysis of the structural characteristics for Shanghai Museum, combining with the real measurement to the building structure dynamics characteristics, the structure design parameters have been corrected. By the story modal structural time history analysis and computation method, computed and gained the quake motion response at the every floor in the Shanghai Museum building when it encounters the fortify quake. The computational results show that under the action of the fortify quake, the quake motion response is provided with obvious story amplify effect in the every story of the Shanghai Museum building. For the quake motion response by the computation to the every story, work out the statistical analysis and give out the motion parameters for the every story in the Shanghai Museum building. It can be as the basis for the cultural relics quake harm analysis, isolator system design and other protection methods future.
引文
1 吴来明,王忠良,高华平等.博物馆文物的防震保护研究(一)--传统抗震措施与现代隔震技术.文物保护与考古科学,2001,13(2) :52
2 国家质量技术监督局.中华人民共和国国家标准--中国地震烈度表(GB/T17742-1999) .北京:中国标准出版社,1999
3 国家地震局.《中国地震烈度区划图(1990) 》概论.北京:地震出版社,1996
4 上海市地震局网络中心编撰.地震与应急手册.http:/www.sbsn.net/topic/emergency/yjs.html,2001
5 蒋振立,刘克法.地震和防震浅话.上海:上海科学普及出版社.1999
6 国家质量技术监督局.中华人民共和国国家标准--中国地震动参数区划图(GB 183306-2001) .北京:中国标准出版社,2001
7 上海市建设委员会.上海市标准--建筑抗震设计规范(DGJ08-9-92) .1992
8 上海市地震局.上海及邻近地区地震危险性分析与基本烈度复核.北京:地震出版社,1991
9 同济大学.上海市地震小区划研究报告.上海:同济大学,1992年10月
10 国家地震局.地震安全性评价工作规范(DB001-94) .北京:地震出版社,1994
11 大崎顺彦.国际地震工程专题讨论会译文集.上海:同济大学出版社,1984
12 吴来明,王忠良,高华平等.博物馆文物的防震保护研究(一)--传统抗震措施与现代隔震技术.文物保护与考古科学,2001,13(2) :50
13 沈聚敏等.抗震工程学.北京:中国建筑工业出版社,2000． 102
14 上海建筑设计研究院.上海博物馆新馆项目设计计算书.1993年1月
15 俞洁勤,沈小白.上海博物馆结构自振频率测试.上海:同济大学结构工程与防灾研究所,1999年12月28日
16 胡聿贤.地震工程学.北京:地震出版社,1984
2 国家质量技术监督局.中华人民共和国国家标准--中国地震烈度表(GB/T17742-1999) .北京:中国标准出版社,1999
3 国家地震局.《中国地震烈度区划图(1990) 》概论.北京:地震出版社,1996
4 上海市地震局网络中心编撰.地震与应急手册.http:/www.sbsn.net/topic/emergency/yjs.html,2001
5 蒋振立,刘克法.地震和防震浅话.上海:上海科学普及出版社.1999
6 国家质量技术监督局.中华人民共和国国家标准--中国地震动参数区划图(GB 183306-2001) .北京:中国标准出版社,2001
7 上海市建设委员会.上海市标准--建筑抗震设计规范(DGJ08-9-92) .1992
8 上海市地震局.上海及邻近地区地震危险性分析与基本烈度复核.北京:地震出版社,1991
9 同济大学.上海市地震小区划研究报告.上海:同济大学,1992年10月
10 国家地震局.地震安全性评价工作规范(DB001-94) .北京:地震出版社,1994
11 大崎顺彦.国际地震工程专题讨论会译文集.上海:同济大学出版社,1984
12 吴来明,王忠良,高华平等.博物馆文物的防震保护研究(一)--传统抗震措施与现代隔震技术.文物保护与考古科学,2001,13(2) :50
13 沈聚敏等.抗震工程学.北京:中国建筑工业出版社,2000． 102
14 上海建筑设计研究院.上海博物馆新馆项目设计计算书.1993年1月
15 俞洁勤,沈小白.上海博物馆结构自振频率测试.上海:同济大学结构工程与防灾研究所,1999年12月28日
16 胡聿贤.地震工程学.北京:地震出版社,1984
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