以一座异形钢结构人行桥为工程背景，探究了一种简洁有效的主梁模拟方法，给出了建立异形斜拉桥动力有限元模型的完整步骤；利用环境振动试验测试的模态结果，验证了所建模型的准确性和建模方法的有效性；运用有限元模型修正技术，对模型参数进行了分析和优化。结果表明该模型能较真实地反映实桥的动力特性，建模方法有很好的工程应用价值。
Abstract
Based on a special-shaped steel pedestrian bridge, the finite models of girder are discussed. A concise and effective model of the special-shaped cable-stayed bridge is established and the procedure of finite element modeling is presented. The accurate and effective of the finite element model of the bridge is certified by ambient vibration test. By use of the finite element model updating method, parameters of the finite element model are analyzed and optimized. Result shows that the finite element model can reflect the bridge in dynamic characteristics accurately. The modeling method is worth to bridge engineering application.
关键词
异形斜拉桥 /
有限元模型 /
环境振动试验 /
有限元模型修正
{{custom_keyword}} /
Key words
special-shaped cable-stayed bridge /
finite element model /
ambient vibration test /
finite element model updating
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 任伟新, 彭雪林. 青洲斜拉桥的基准动力有限元模型 [J]. 计算力学学报, 2007, 24(5): 609-614.
REN Wei-xin, PENG Xue-lin. Baseline dynamic finite element model of Qingzhou cable-stayed bridge [J]. Chinese Journal of Computational Mechanics, 2007, 24(5): 609-614.
[2] 范立础. 桥梁抗震 [M]. 上海: 同济大学出版社, 1997.
Fan li-chu. Bridge seismic [M]. Shanghai: Tongji University Press, 1997.
[3] Wilson JC, Gravelle W. Modeling of a cable-stayed bridge for dynamic analysis [J]. Earthquake Engineering and Structural Dynamics, 1991, 20(8): 707-721.
[4] Zhu LD, Xiang HF, Xu YL. Triple-Girder Model for Modal Analysis of Cable-Stayed Bridges with Warping Effect [J]. Engineering Structures, 2000-10, 22(10), 1313–1323.
[5] JT/T 663-2006. 公路桥梁板式橡胶支座规格系列 [S]. 北京: 人民交通出版社, 2004.
JT/T 663-2006. Series of elastomeric pad bearings for highway bridges [S]. Beijing: China Communication Press, 2004.
[6] GB 50017-2003. 钢结构设计规范 [S]. 北京: 中国计划出版社, 2003.
GB 50017-2003. Code for design of steel structures [S]. Beijing: China Planning Press, 2003.
[7] JTG D62-2004. 公路钢筋混凝土及预应力混凝土桥涵设计规范 [S]. 北京: 人民交通出版社, 2004.
JTG D62-2004. Code for design of highway reinforced concrete and prestressed concrete bridges and culverts [S]. Beijing: China Communication Press, 2004.
[8] JTG D60-2004. 公路桥涵通用设计规范 [S]. 北京: 人民交通出版社, 2004.
JTG D60-2004, General code for design of highway bridges and culverts [S]. Beijing: China Communication Press, 2004.
[9] 任伟新. 环境振动系统识别方法的比较分析 [J]. 福州大学学报(自然科学版), 2001, 29(6): 80-86.
REN Wei-xin. Comparison of system identification methods using ambient vibration measurements [J]. Journal of Fuzhou University (Natural Science), 2001, 29(6): 80-86.
[10] Ren WX, Obata M. Elastic-Plastic Seismic Behavior of Long Span Cable-Stayed Bridges [J]. Journal of Bridge Engineering, ASCE, 1999, 4(3): 194-203.
[11] Brownjohn JMW, Moyo P, Omenzetter P, Lu Y. Assessment of Highway Bridge Upgrading by Dynamic Testing and Finite-Element Model Updating [J]. Journal of Bridge Engineering, ASCE, 2003, 8(3): 162-172.
[12] Bijaya Jaishi. Finite Element Model Updating of Civil Engineering Structures under Operational Conditions [D]. Fuzhou: Fuzhou University, 2005.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(1945 KB)
