Abstract: Curved?cable-stayed?bridge?is?complex?in?stress?due?to?curvature.?Special?structures?such?as?main?beam?anchorage?offsets,?main?tower?anchorage?offsets?and?bearing?offsets?are?available?to?improve?the?mechanical?state?of?the?bridge.?Based?on?Guijiugou?Bridge,?the?influences?of?main?beam?and?main?tower?anchorage?with?offsets?toward?outboard?curve?and?the?main?pier?beating?with?offsets?toward?inboard?curve?on?mechanical?state?of?curved?cable-stayed?bridge?are?analyzed?by?FEM.?The?results?show?that?the?influences?of?all?the?offsets?on?the?differences?of?cable-tensions?of?the?two?sides?of?the?curve,?the?transverse?deflections?of?towers?and?the?influences?of?bending?moments?of?crossbeam?are?all?in?linear?tendency.

Key words: curved cable-stayed bridge , anchorage , beating , special structure , offset ;

摘要： 曲率的影响使曲线斜拉桥受力复杂,可采用主梁锚固点偏移、主塔锚固点偏移以及支座偏移等特殊构造改善 其力学性能。以龟韭沟大桥为例,采用有限元方法,分析了曲线斜拉桥主梁和主塔锚固点向曲线外侧、主墩支座向 曲线内侧偏移对结构受力的影响。结果表明:曲线斜拉桥主梁和主塔锚固点及主墩支座偏移对曲线内外侧斜拉索 索力差、主塔塔顶横向位移、主梁横梁弯矩的影响均呈线性趋势。

关键词: 曲线斜拉桥, 锚固点, 支座, 特殊构造, 偏移