(1.長沙鐵道學(xué)院建工系，長沙410075；
2.中南工業(yè)大學(xué)資開系，長沙410083)
摘 要: 對全橋、橫梁采用兩次有限元離散計(jì)算方法，考慮橋面系、主桁架相互作用問題，研究了單線和雙線鋼桁梁橋的實(shí)際受力狀態(tài)和設(shè)計(jì)者常采用的簡化計(jì)算方法存在的問題，對《鐵路橋跨結(jié)構(gòu)設(shè)計(jì)規(guī)范》(初稿)中有關(guān)縱、橫梁的計(jì)算條文提出了建議，它們對各類鋼桁梁橋的設(shè)計(jì)均有參考價(jià)值。
關(guān)鍵字: 橋而系 主桁架 縱、橫梁 相互作用 約束方程
LONGITUDINAL AND TRANSVERSE BEAMS
OF RAILWAY STEEL TRUSS BRIDGES
（1.Department of Architectural Engineering,Changsha Railway Institute,Changsha 410075；
2.Department of Resources Exploitation Engineering,
Central South University of Technology,Changsha 410083）
Abstract:Using two step finite element method and allowing for the interact between the main truss and the floor system of the railway steel truss bridges, the actual stresses of the single-lined bridge and double-lined bridge, as well as the problems existing in the simple method often used by designers have been analyzed. The suggestions were put forward to the calculation of longitudinal and transverse beams in the“Railway Bridge Design Code”.
Key words: floor system main truss longitudinal and transverse beam interact , restraining equation
