斜拉-悬吊协作体系桥抗震性能参数分析
|
摘要
以一座1 400m主跨的斜拉-悬吊协作体系方案桥为工程背景,采用多振型地震反应谱方法,对其进行水平地震作用下的结构地震反应分析,揭示主缆矢跨比、吊跨比、边跨长度、辅助墩设置、主梁支承方式和主梁结构形式等结构设计参数对地震反应的影响,并提出各结构设计参数的合理取值.结果表明:当主缆矢跨比取为1/10、吊跨比为0.4~0.5、采用短边跨并设置辅助墩、半漂浮体系、桥面主梁采用混合梁时,斜拉-悬吊组合体系桥可以获得比较好的抗震性能.
By taking a cable-stayed-suspension hybrid bridge with main span of 1400 mas example,seismic response of the bridge under the horizontal seismic excitation was investigated numerically by multimode response spectrum analysis.The impact of structural design parameters,including the cables sag to span ratio,the suspension to span ratio,the side span length,the installation of subsidiary piers in side spans,the girder supporting system and the deck form,on the seismic performance of the bridge were also discussed Then,the favorable values of these design parameters are proposed.The results show that better seismic performance can be achieved for the cable-stayed-suspension hybrid bridge with the cables sag to span ratio of 1/10,with the suspension to span ratio of 0.4-0.5,with short side spans and subsidiary piers in side spans.The earthquake resistant behavior of cable-stayed-suspension hybrid bridge will be enhanced when semi-floating system and hybrid deck form are employed.
By taking a cable-stayed-suspension hybrid bridge with main span of 1400 mas example,seismic response of the bridge under the horizontal seismic excitation was investigated numerically by multimode response spectrum analysis.The impact of structural design parameters,including the cables sag to span ratio,the suspension to span ratio,the side span length,the installation of subsidiary piers in side spans,the girder supporting system and the deck form,on the seismic performance of the bridge were also discussed Then,the favorable values of these design parameters are proposed.The results show that better seismic performance can be achieved for the cable-stayed-suspension hybrid bridge with the cables sag to span ratio of 1/10,with the suspension to span ratio of 0.4-0.5,with short side spans and subsidiary piers in side spans.The earthquake resistant behavior of cable-stayed-suspension hybrid bridge will be enhanced when semi-floating system and hybrid deck form are employed.
引文
[1]尼尔斯J吉姆辛.缆索支承桥梁—概念与设计[M].金增洪,译.2版.北京:人民交通出版社,2002.
[2]张新军,张丹.吊拉组合体系桥的研究进展[J].浙江工业大学学报,2007,35(5):553-558.
[3]韩立中,张哲,张劲泉,等.大跨自锚式斜拉-悬索协作体系桥地震响应及减震控制分析研究[J].武汉理工大学学报:交通科学与工程版,2011,35(5):945-947.
[4]刘春城,张哲.自锚式悬索桥的纵向地震反应研究[J].武汉理工大学学报:交通科学与工程版,2002,26(5):607-610.
[5]黄海新.自锚式斜拉-悬吊协作体系桥动力响应研究[D].大连:大连理工大学,2007.
[6]张凯.自锚式斜拉-悬吊桥地震反应分析[D].大连:大连理工大学,2006.
[7]文霁.斜拉-悬索体系桥力学特性研究[D].成都:西南交通大学,2004.
[8]孟续东.1 700米主跨斜拉-悬索协作体系桥梁方案设计和静动力计算分析研究[D].成都:西南交通大学,2010.
[9]张新军,潘航滨.吊拉组合体系桥施工过程抗风稳定性研究[J].浙江工业大学学报,2011,39(5):541-545.
[10]中国交通运输部.JTGT B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[2]张新军,张丹.吊拉组合体系桥的研究进展[J].浙江工业大学学报,2007,35(5):553-558.
[3]韩立中,张哲,张劲泉,等.大跨自锚式斜拉-悬索协作体系桥地震响应及减震控制分析研究[J].武汉理工大学学报:交通科学与工程版,2011,35(5):945-947.
[4]刘春城,张哲.自锚式悬索桥的纵向地震反应研究[J].武汉理工大学学报:交通科学与工程版,2002,26(5):607-610.
[5]黄海新.自锚式斜拉-悬吊协作体系桥动力响应研究[D].大连:大连理工大学,2007.
[6]张凯.自锚式斜拉-悬吊桥地震反应分析[D].大连:大连理工大学,2006.
[7]文霁.斜拉-悬索体系桥力学特性研究[D].成都:西南交通大学,2004.
[8]孟续东.1 700米主跨斜拉-悬索协作体系桥梁方案设计和静动力计算分析研究[D].成都:西南交通大学,2010.
[9]张新军,潘航滨.吊拉组合体系桥施工过程抗风稳定性研究[J].浙江工业大学学报,2011,39(5):541-545.
[10]中国交通运输部.JTGT B02-01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
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