Verification of Structural Performance of a Main Tower Inclined Suspension Bridge by Simple Monitoring and FE Analysis
Carlos Arturo Liñan Panting*1,†, Kohei Nagai*2, Eiji Iwasaki*3, and Thein Nu*4
*1Graduate School of Engineering, Nagaoka University of Technology
2-364 Sekihara, Nagaoka, Niigata, Japan
*2Institute of Industrial Science, The University of Tokyo, Tokyo, Japan
*3Civil and Environmental Engineering Department, Nagaoka University of Technology, Niigata, Japan
*4Department of Bridge, Ministry of Construction, Myanmar
This study conducted a simple monitoring for a deformed suspension bridge in Myanmar to confirm advances in deformation and verified the structural performance by FEM. The bridge is Twantay Bridge those main towers were inclined due to the movement of anchor blocks, that resulted in lowering of the road surface level. Therefore, inclinometers were set for simple monitoring to confirm advances in the deformation. The result of measurements performed for 50 days did not indicate any significant advances in inclination with respect to the main towers. The FE analysis to evaluate the structural performance estimated the current condition of the bridge by reproducing the construction process of the bridge and simulating the setting and removal of concrete blocks used as bridge railings as well as the sliding of anchor blocks. At each step of the analysis, the results were compared with the measured data to verify the appropriateness of the analysis. The findings confirmed that the current tensile force of the cable did not result in hazardous conditions that led to the rupture of the cable.
-  Japan Infrastructure Partners, “Current Situation and Issues of Myanmar’s Bridge Work,” Bridge Maintenance Report of Japan Infrastructure Partners, 2012.
-  E. Iwasaki and M. Nagai, “A development of cable element for flexible cable structures with pulley,” J. Struct. Eng., Vol.48A, pp. 151-158, Mar., 2002.3 (in Japanese).
-  D. T. Dang, E. Iwasaki, and M. Nagai, “A numerical method for shape finding of cable structures,” J. Applied Mech., Vol.8, pp. 133-142, Aug. 2005 (in Japanese).