Research methods: Taking the Tangjiadu-Fujiang Double-track Railway Bridge in Dazhou-Chengdu Railway and Sanhuizhen-Qujiang Triline Railway Super Major Bridge in Xiangfan-chongqing Railway for example, this paper researches the lateral analysis and calculation of box beam by using MIDAS.
Research result: Through analysis of the examples, this paper provides the results that when the lateral prestressing tendon is set in top deck, the moments of top deck and the top of web would reduce obviously, while the moment of bottom slab would increase sIighly , the top deck would he in compression and the tension stress of bottom slap would increase slightly.
Research conclusion: This paper concludes that it is beneficial to set the lateral prestressing tendon rationally in top deck. But if the lateral width of the top deck is not too wide and the height of the top deck is not restricted, the lateral prestressing tendon ire top deck need not be set.
2007, Vol. 24 
