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JDR Vol.15 No.3 pp. 360-367
(2020)
doi: 10.20965/jdr.2020.p0360

Paper:

Analysis of Seismic Performance of Suspension Bridge in Myanmar

Punyawut Jiradilok*1,†, Kohei Nagai*1, Koji Matsumoto*2, Takeshi Yoshida*3, Tetsuro Goda*3, and Eiji Iwasaki*4

*1Institute of Industrial Science, The University of Tokyo
4-6-1 Komaba, Meguro, Tokyo 153-8505, Japan

Corresponding author

*2Hokkaido University, Hokkaido, Japan

*3Nippon Koei Co., Ltd., Tokyo, Japan

*4Nagaoka University of Technology, Niigata, Japan

Received:
September 12, 2019
Accepted:
February 27, 2020
Published:
March 30, 2020
Keywords:
seismic performance evaluation, dynamic response analysis, Myanmar, suspension bridge
Abstract

After the collapse of Myaungmya Bridge in April 2018, the safety of infrastructure became an urgent task and attracted increased public interest in Republic of the Union of Myanmar. After the incident, monitoring systems were installed in several suspension bridges, of the same structure type as Myaungmya Bridge, recording unwanted bridge movements. The observations indicate that a large deformation occurred, rendering the current bridge condition different from its original design, though the safety of the current condition is unclear. Therefore, in this study, numerical models are simulated utilizing the data from detailed observations made by the monitoring system, to confirm the safety of the bridge. Twantay Bridge was chosen as the bridge analysis target. Linear time history analyses were performed on Twantay Bridge, in which the seismic performance was evaluated by comparing the stresses generated in the main members with the allowable stresses. Moreover, by comparing the analysis results obtained from two models – a design drawing model of the Twantay Bridge, and a model that reproduced the present condition of the bridge – the current bridge performance was confirmed. The information obtained from this analysis is useful in the field of maintenance and will allow Myanmar officials to effectively plan and take corrective action for the requisite maintenance of the damaged bridge.

Cite this article as:
P. Jiradilok, K. Nagai, K. Matsumoto, T. Yoshida, T. Goda, and E. Iwasaki, “Analysis of Seismic Performance of Suspension Bridge in Myanmar,” J. Disaster Res., Vol.15, No.3, pp. 360-367, 2020.
Data files:
References
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  2. [2] H. H. Aung, “Potential Seismicity of Yangon Region (Geological Approach),” Advances in Geosciences, Vol.26, pp. 139-151, 2010.
  3. [3] Y. Yamada, T. Tsuchida, N. M. Kyaw, T. Aoyama, M. M. S. Hlaing, and R. Hashimoto, “A study on physical and mechanical properties for soft to firm clays in Yangon area – Properties of clays deposit at the sedimentary basins in Myanmar,” Soils and Foundations, in press, doi: 10.1016/j.sandf.2019.05.008, 2019.
  4. [4] Japan Infrastructure Partners (JIP), “Current Situation and Issues of Myanmar’s Bridge Work,” 2012.

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Last updated on Aug. 09, 2020