[1]熊文,肖汝诚,叶见曙.超千米级CFRP与钢组合拉索斜拉桥动力性能分析[J].东南大学学报(自然科学版),2014,44(5):1011-1016.[doi:10.3969/j.issn.1001-0505.2014.05.024]
 Xiong Wen,Xiao Rucheng,Ye Jianshu.Dynamic performance analysis of over-1000m-span cable-stayed bridges with CFRP-steel composite stay cables[J].Journal of Southeast University (Natural Science Edition),2014,44(5):1011-1016.[doi:10.3969/j.issn.1001-0505.2014.05.024]
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超千米级CFRP与钢组合拉索斜拉桥动力性能分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第5期
页码:
1011-1016
栏目:
交通运输工程
出版日期:
2014-09-20

文章信息/Info

Title:
Dynamic performance analysis of over-1000m-span cable-stayed bridges with CFRP-steel composite stay cables
作者:
熊文1肖汝诚2叶见曙1
1东南大学交通学院, 南京210096; 2同济大学土木工程学院, 上海200092
Author(s):
Xiong Wen1 Xiao Rucheng2 Ye Jianshu1
1School of Transportation, Southeast University, Nanjing 210096, China
2College of Civil Engineering, Tongji University, Shanghai 200092, China
关键词:
斜拉桥 超千米级 组合拉索 碳纤维增强塑料 动力性能
Keywords:
cable-stayed bridge over-1 000 m-span composite stay cable carbon fiber-reinforced polymer(CFRP) dynamic performance
分类号:
U448.27
DOI:
10.3969/j.issn.1001-0505.2014.05.024
摘要:
为研究超千米级碳纤维增强塑料(CFRP)与钢组合拉索斜拉桥动力性能,参考苏通大桥设计参数,选择优化的组合拉索面积比,分别建立1 400 m CFRP与钢组合拉索斜拉桥有限元模型以及全钢、全CFRP拉索斜拉桥2个对比模型.首先,对组合拉索斜拉桥以及对比模型的固有频率和振型进行计算.然后,选择典型地震波进行地震动响应时程分析,并分别研究一维激励和三维激励2种输入形式.最后,采用规范法,从颤振稳定性、静力扭转稳定性以及抖振振幅估计3个方面对抗风稳定性进行分析.结果表明:采用合理优化面积比0.35,可使CFRP与钢组合拉索斜拉桥的抗震性能不仅优于传统钢拉索设计以及价格昂贵的全CFRP拉索设计,而且其主要构件内力数值也较低;对于抗风稳定性,组合拉索斜拉桥略低于全钢拉索设计,但明显优于全CRFP拉索设计,可在减轻拉索自重的同时提高其经济性能.
Abstract:
To investigate the dynamic performances of cable stay bridges with the carbon fiber-reinforced polymer(CFRP)-steel composite stay cables, a finite element model of 1 400 m-span bridge with the proposed composite stay cables was built following the Sutong bridge design. An optimized area ratio was further applied to the proposed composite stay cables. Two models with pure steel and pure CFRP stay cables were also given as comparative cases. First, the natural vibration frequencies and modes of these three models were calculated. Then, the real time seismic responses of the composite bridge and other two comparative designs were simulated under the classic earthquake waves by using one-dimension and three-dimension inputs. Finally, the critical wind speed of flutter, critical wind speed of torsional divergence, and vibration amplitude of buffeting were obtained according to the existing bridge design codes. The results show that the composite design with an optimized area ratio of 0.35 has better earthquake resistance performances than the traditional pure steel and expensive pure CFRP cases. Moreover, the internal forces in the main members of the composite design are even lower than those of the other two designs. The wind resistance performances of the composite design, with light self-weight and good economical character, is only a little weaker than those of the pure steel case but obviously better than those of the pure CFRP case.

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备注/Memo

备注/Memo:
收稿日期: 2014-01-20.
作者简介: 熊文(1982—),男,博士,讲师, wxiong@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51208097)、高等学校博士学科点专项科研基金资助项目(20120092120058)、江苏省自然科学基金资助项目(BK2012343).
引用本文: 熊文,肖汝诚,叶见曙.超千米级CFRP与钢组合拉索斜拉桥动力性能分析[J].东南大学学报:自然科学版,2014,44(5):1011-1016. [doi:10.3969/j.issn.1001-0505.2014.05.024]
更新日期/Last Update: 2014-09-20