Abstract
The Yadanatheinkha bridge under construction is collapsed due to the Thabeikkyin earthquake happened on 11 November 2012 in Myanmar. Only the superstructure of the Yadanatheinkha bridge under construction is considered in this study. Static analysis of the Yadanatheinkha bridge under construction and dynamic analysis due to El Centro 1940 earthquake are carried out by numerical analysis using OpenSees software. Firstly, the king post is neglected to check the performance of the bridge structure under construction without supporting of the king post and only the weight of all structural members of the bridge truss and traveler crane are considered in the analysis. Then, the Yadanatheinkha bridge under construction with supporting of the king post is analyzed to realize the importance of the structural control of the king post for the bridge during construction stage and the weight of all structural members, traveler crane and king post are considered for the analysis. The stability of the bridge under construction is checked for both cases.
