- 摘 要
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李 莉， 舒贛平
（東南大學土木工程學院，南京210096）[摘要] 采用空間有限元方法，結(jié)合具體工程對小曲率半徑鋼箱梁橋進行研究，對比分析其不同截面形式下的受力特性，并對曲線鋼箱梁橋的受力特點、剪力滯效應(yīng)和最優(yōu)截面方案進行探討。分析表明：對于大跨度薄腹鋼箱梁橋，增設(shè)橫隔板和必要的縱肋是減小截面畸變變形的最優(yōu)方案。同時，對于此類曲線橋應(yīng)重視必要的抗扭支座設(shè)置。
[關(guān)鍵詞] 鋼箱梁；曲線橋；有限元；橫隔板；正應(yīng)力
中圖分類號：U448.11 文獻標識碼：A 文章編號：1002-848X(2011) S2-0244-05Design and study on curved steel box girder bridge of small radius
Li Li, Shu Ganping
(Department of Civil Engineering, Southeast University, Nanjing 210096, China)Abstract: Curved steel box girder bridge of small radius were studied by a specific project. Using the method of finite element, the mecharucal properties of curved steel box girder bridge with different section type were compared, and the shear lag effect and the best choice of section of steel box girder bridge were analyzed. The results show that for large-span steel box girder bridge with slender web, using cross spacer and necessary longitudinal rib is the most efficient way to reduce distortion of the section. Meanwhile, it is important to use torsional bearings when necessary.
Keywords: steel box girder; curved bridge; fuute element; cross spacer; normal stress
