Open Access
ARTICLE
Enhancing the Structural Longevity of the Bridges with Insufficient Seismic Capacity by Retrofitting
Y.C. Sung1, D.W. Chang2, M.Y. Cheng2, T.L. Chang2, K.Y. Liu3
1 Department of Civil Engineering, National Taipei University of Technology
2 CECI Engineering Consultants, Inc., Taiwan
3 National Center for Research on Earthquake Engineering, Taipei, Taiwan
Structural Longevity 2009, 1(1), 1-16. https://doi.org/10.3970/sl.2009.001.001
Abstract
The seismic assessment and retrofit of existing bridges has become
important in Taiwan, since the Chi-Chi earthquake in 1999. In order to ensure the
safety of the traffic network, a project has been launched to assess the seismic resistance capacity of over 2,200 bridges on the Taiwan Roadway System. A detailed
evaluation procedure, using the modified ATC-40 capacity spectrum method was
first applied to over 140 regular bridges. The state-of-the-art nonlinear static analysis (pushover analysis) was adopted to calculate the seismic resistance capacity
in terms of PGA, in order to compare the seismic demand according to the code
requirement. A case study of the Li-Kun bridge in Taiwan will introduce the detailed seismic evaluation procedure. Based on the assessment results, the retrofit
strategy might be established to prolong the lifetime, and also enhance the seismic
resistance of the bridge. A feasible approach of using a steel jacket can extend
the anticipated service life longer than 100 years. Therefore, the goal of structural
longevity is achievable at modest cost.
Keywords
Cite This Article
Sung, Y., Chang, D., Cheng, M., Chang, T., Liu, K. (2009). Enhancing the Structural Longevity of the Bridges with Insufficient Seismic Capacity by Retrofitting.
Structural Longevity, 1(1), 1–16. https://doi.org/10.3970/sl.2009.001.001