Analysis of Bridge under Construction Collapsed by 2012 Thabeikkyin Earthquake in Myanmar

摘要

The Yadanatheinkha bridge under consturuction is collapsed due to the Thabeikkyin earthquake hap-pened on 11 November 2012 in Myanmar. Only the superstructure of the Yadanatheinkha bridge under constructure is considered in this study. Static analysis of the Yadanatheinkha bridge under constructure 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 con-struction 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 during construction stage bridge 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.