基于单振动台的桥梁非一致激励试验

U446.1; 为研究桥梁在非一致激励作用下的动力响应,设计并制作了一座缩尺比例为1/20的连续梁桥,对其进行非一致激励输入的地震模拟振动台试验.通过对单个小振动台设置延伸台面、改变台面输入激励等方式进行振动台设备改进,选取了适宜Ⅱ类场地的El-Centro波、Taft波等地震波,分析了不同地震烈度下桥梁的宏观破坏形式和主要部位的位移时程曲线.试验结果表明:随着输入地震烈度的增大,桥梁的损伤也随之增大;改进后振动台原台面、延伸台面的地震激励输入差异较明显.由此可知,采用改进后的振动台设备可进行大跨度桥梁结构的非一致地震激励振动台试验,得到桥梁结构在地震作用下的动力响应....

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Published in江苏大学学报（自然科学版） Vol. 38; no. 6; pp. 703 - 723
Main Authors 吴多, 刘来君, 李青宁, 张夏, 薛成凤
Format Journal Article
LanguageChinese
Published 长安大学公路学院,陕西西安,710064%西安建筑科技大学土木工程学院,陕西西安,710055 01.11.2017
Subjects
桥梁
单振动台
模型设计
非一致激励
single shaking table
动力响应
model design
non-uniform excitation
bridge
dynamic response
Online AccessGet full text
ISSN1671-7775
DOI10.3969/j.issn.1671-7775.2017.06.014

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Abstract U446.1; 为研究桥梁在非一致激励作用下的动力响应,设计并制作了一座缩尺比例为1/20的连续梁桥,对其进行非一致激励输入的地震模拟振动台试验.通过对单个小振动台设置延伸台面、改变台面输入激励等方式进行振动台设备改进,选取了适宜Ⅱ类场地的El-Centro波、Taft波等地震波,分析了不同地震烈度下桥梁的宏观破坏形式和主要部位的位移时程曲线.试验结果表明:随着输入地震烈度的增大,桥梁的损伤也随之增大;改进后振动台原台面、延伸台面的地震激励输入差异较明显.由此可知,采用改进后的振动台设备可进行大跨度桥梁结构的非一致地震激励振动台试验,得到桥梁结构在地震作用下的动力响应.
AbstractList U446.1; 为研究桥梁在非一致激励作用下的动力响应,设计并制作了一座缩尺比例为1/20的连续梁桥,对其进行非一致激励输入的地震模拟振动台试验.通过对单个小振动台设置延伸台面、改变台面输入激励等方式进行振动台设备改进,选取了适宜Ⅱ类场地的El-Centro波、Taft波等地震波,分析了不同地震烈度下桥梁的宏观破坏形式和主要部位的位移时程曲线.试验结果表明:随着输入地震烈度的增大,桥梁的损伤也随之增大;改进后振动台原台面、延伸台面的地震激励输入差异较明显.由此可知,采用改进后的振动台设备可进行大跨度桥梁结构的非一致地震激励振动台试验,得到桥梁结构在地震作用下的动力响应.
Abstract_FL To investigate the dynamic response of bridges under non-uniform excitation,a 1/20 reducedscale continuous beam bridge was designed and fabricated.The seismic simulation shaking table test with non-uniform excitation input was carried out.The extension table was set for the single small vibration table,and the table input excitation was changed to improve the shaking table equipment.The El-Centro and Taft waves suitable for the class Ⅱ field were selected,and the macroscopic failure modes and the time history displacement curve of main parts were analyzed under different seismic intensities.The experimental results show that the bridge damage is increased with the increasing of seismic intensity,and the difference of seismic excitation input between original table and extended table becomes obvious after improving the shaking table equipment.The improved equipment can be used for non-uniform seismic excitation shaking table test of large span bridge structure,and the dynamic response of bridges under seismic effect can also be obtained.
Author 李青宁
张夏
吴多
薛成凤
刘来君
AuthorAffiliation 长安大学公路学院,陕西西安,710064%西安建筑科技大学土木工程学院,陕西西安,710055
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Author_FL XUE Chengfeng
LIU Laijun
LI Qingning
ZHANG Xia
WU Duo
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  fullname: XUE Chengfeng
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  fullname: 吴多
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DocumentTitle_FL Experiment of non-uniform excitation for bridge based on single shaking table
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Keywords 桥梁
单振动台
模型设计
非一致激励
single shaking table
动力响应
model design
non-uniform excitation
bridge
dynamic response
Language Chinese
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PublicationTitle 江苏大学学报（自然科学版）
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Publisher 长安大学公路学院,陕西西安,710064%西安建筑科技大学土木工程学院,陕西西安,710055
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Title 基于单振动台的桥梁非一致激励试验
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