全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于能量原理的板桁结合型加劲梁连续化分析方法

, PP. 34-43

Keywords: 桥梁工程,大跨径悬索桥,连续化分析方法,板桁结合型加劲梁,能量原理,剪切应变能

Full-Text   Cite this paper   Add to My Lib

Abstract:

?针对大跨径板桁结合型加劲梁悬索桥精细有限元模型单元数量多、计算效率低的特点,基于能量原理推导了板桁结合型加劲梁主桁架腹杆和下平联的连续化等效板厚计算公式,根据板桁结合型加劲梁的弯曲与扭转受力特点分别构造了相应的连续化等效截面,并采用悬臂梁模型验证等效截面的合理性,最后以主跨跨径1480m的岳阳洞庭湖大桥为研究对象,将连续化分析方法与精细有限元法的位移与应力计算结果进行了比较。结果表明:采用2种方法计算得到的加劲梁位移的结果吻合较好,最大相对误差不超过4%;移动荷载作用时,采用连续化分析方法计算得到的上弦杆压应力受桥面板剪力滞效应的影响,导致其压应力的相对误差较下弦杆大,但上弦杆压应力的绝对差值不超过5.0MPa;横桥向静风荷载作用下,采用连续化分析方法计算得到的弦杆应力相对误差不超过5%;连续化分析方法的计算精度能满足要求,计算效率较精细有限元法大幅提高。

References

[1]  小西一郎.钢桥:第三分册[M].朱立冬,应达之,许克宾,等,译.北京:人民铁道出版社,1980. KONISHI I.Steel Bridge:The Third Volume[M].Translated by ZHU Li-dong, YING Da-zhi,XU Ke-bing,et al.Beijing:China Railway Publishing House,1980.
[2]  MATSON D D.China Lions' Gate Suspension Bridge:Design of the Suspended Structure Replacement[C]//ASCE.Structures Congress 2005:Metropolis and Beyond.New York:ASCE,2005:1-8.
[3]  SPOTH T,SERZAN K,CONDELL S.The New Tacoma Narrows Suspension Bridge-design of the Suspended Superstructure[C]//ASCE.Structures Congress 2005:Metropolis and Beyond.New York:ASCE,2005:161-168.
[4]  周绪红,狄 谨,秦凤江,等.岳阳洞庭湖大桥主桥静力分析报告[R].西安:长安大学,2012. ZHOU Xu-hong,DI Jin,QIN Feng-jiang, et al.Static Mechanical Analysis Report of the Main Bridge of Yueyang Dongting Lake Suspension Bridge[R].Xi'an:Chang'an University,2012.
[5]  OKUMURA T,WATANABE H.An Investigation of Truss Bridges Under Torsional Loading[J].Proceedings of the Institution of Civil Engineering,1965,121:1-9.
[6]  李国豪.桥梁与结构理论研究[M].上海:上海科学技术文献出版社,1983. LI Guo-hao.Theoretical Research of Bridge and Structures[M].Shanghai:Shanghai Scientific and Technological Literature Publisher,1983.
[7]  GILTNER B,KASSIMALI A.Equivalent Beam Method for Trusses[J].Practice Periodical on Structural Design and Construction,2000,5(2):70-77.
[8]  贺拥军,周绪红,董石麟.交叉立体桁架系巨型网格结构的简化计算法[J].湖南大学学报:自然科学版,2006,33(2):14-17. HE Yong-jun,ZHOU Xu-hong,DONG Shi-lin.Simplified Analysis Method of Latticed Intersected Three-dimensional Beam System Reticulated Mega-Structure[J].Journal of Hunan University:Natural Sciences,2006,33(2):14-17.
[9]  陈玉骥.下承式钢桁结合梁在双线对称荷载作用下的近似解[J].铁道学报,2008,30(1):48-52. CHEN Yu-ji.Approximate Solution to Through Steel-truss Composite Beams Under the Action of Double-track Symmetry Loads[J].Journal of the China Railway Society,2008,30(1):48-52.
[10]  ZHU L D,XIANG H F,XU Y L.Triple-girder Model for Modal Analysis of Cable-stayed Bridges with Warping Effect[J].Engineering Structures,2000,22(10):1313-1323.
[11]  李春光,陈政清,张志田.大跨度桁式加劲梁悬索桥气弹模型等效设计[J].振动与冲击,2009,28(9):171-174,187,222. LI Chun-guang,CHEN Zheng-qing,ZHANG Zhi-tian.Equivalent Design of Aeroelasticmodel for a Long-span Suspension Bridge with Truss Stiffening Girder[J].Journal of Vibration and Shock,2009,28(9):171-174,187,222.
[12]  范钦珊.材料力学[M].北京:清华大学出版社,2004. FAN Qin-shan.Mechanics of Materials[M].Beijing:Tsinghua University Press,2004.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133