[1] Ma WengangHuang QiaoChen XiaoqiangRen Yuan,. Mechanical performance evaluation of a new type ofcable-stayed beam-arch combination bridge based on field tests [J]. Journal of Southeast University (English Edition), 2012, 28 (1): 64-72. [doi:10.3969/j.issn.1003-7985.2012.01.012]

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Mechanical performance evaluation of a new type ofcable-stayed beam-arch combination bridge based on field tests()

基于现场试验的新型斜拉-梁拱组合体系桥梁力学性能评估

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

28

Issue:

2012 1

Page:

64-72

Research Field:

Traffic and Transportation Engineering

Publishing date:

2012-03-30

Info

Title:

Mechanical performance evaluation of a new type ofcable-stayed beam-arch combination bridge based on field tests

基于现场试验的新型斜拉-梁拱组合体系桥梁力学性能评估

Author(s):

Ma WengangHuang QiaoChen XiaoqiangRen Yuan

School of Transportation, Southeast University, Nanjing 210096, China

马文刚;  黄侨;  陈晓强;  任远

东南大学交通学院, 南京 210096

Keywords:

arch bridge;  cable-stayed bridge;  vertical load;  field test;  three-dimensional model

拱桥;  斜拉桥;  竖向荷载;  现场试验;  三维模型

PACS:

U443.38;U448.27

DOI:

10.3969/j.issn.1003-7985.2012.01.012

Abstract:

In order to study the mechanical performance of a new type of cable-stayed beam-arch combination bridge, the results of field static and dynamic load tests are comparatively analyzed with numerical results based on the Jingyi bridge straddling the Daxi River in Yixing. First, the test scheme, tasks, the corresponding measure method, as well as the relevant codes are described. Secondly, two sets of three-dimensional finite element models are established. One is Ansys which uses the solid element and the other is Midas which adopts the beam element. Finally, the experimental and analytical results are comparatively analyzed, and they show an agreement with each other. The results show that the bridge possesses adequate load-carrying capacity under all static load cases, but the capacity of dissipating external input energy is insufficient due to the relatively smaller damping ratio. The study results can provide a reference for further study and optimization of this type of bridge. Calibrated finite-element models that reflect the real conditions can be used as a baseline for future maintenance of the bridge.

为了研究新型斜拉-梁拱组合体系桥梁的力学性能, 以跨越宜兴大溪河的荆宜大桥为对象, 对现场静、动载作用下结构的实测反应与相应的数值计算结果进行了对比分析研究.首先, 给出了试验方案、任务、相应的测试方法及引用的相关规范;然后分别建立了三维Ansys实体模型和三维Midas杆系模型;最后, 对比分析了模型计算结果与试验测试结果, 两者吻合良好.研究表明:该桥在各静载工况下均具有足够的承载力;在动载作用下, 实测阻尼比相对较小, 结构耗散外部输入能量的能力偏低.研究成果可为对该类结构进一步研究和优化提供参考, 同时经试验修正的、准确的计算模型可以作为该桥营运后维修、加固的基准模型.

References:

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Memo

Memo:

Biographies: Ma Wengang(1980—), male, graduate; Huang Qiao(corresponding author), male, doctor, professor, qhuanghit@126.com.
Citation: Ma Wengang, Huang Qiao, Chen Xiaoqiang, et al. Mechanical performance evaluation of a new type of cable-stayed beam-arch combination bridge based on field tests[J].Journal of Southeast University(English Edition), 2012, 28(1):64-72.[doi:10.3969/j.issn.1003-7985.2012.01.012]

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