曲线宽幅部分斜拉桥无索区长度分析  

Analysis on the Length of Unsupported Deck for Partially Cable-Stayed Bridges with Curved and Widen Beams

作　　者：李红红 Li Honghong(Guangzhou Panyu Polytechnic,Guangzhou Guangdong 511483,China)

机构地区：[1]广州番禺职业技术学院,广东广州511483

出　　处：《广东公路交通》2025年第1期49-53,共5页Guangdong Highway Communications

摘　　要：为进行曲线宽幅部分斜拉桥结构的空间布局设计,掌握空间曲梁的无索区对结构性能的影响规律,通过数值分析方法,建立全桥空间分析模型;通过调整无索区的长度,分析四种不同曲率半径下,曲线宽幅部分斜拉桥的主梁内力和变形、主塔水平变形和斜拉索索力的变化规律。研究结果表明,当主塔根部无索区和边支座无索区分别控制在主跨跨径的0.08~0.24倍和0.04~0.12倍时,主梁的变形、内力适中,塔根部主梁截面偏心距较小,桥梁结构的弯扭耦合空间受力更为合理。To design the spatial layout of cable-stayed bridge structures with curved and widen beams,and to understand the impact of the cable-free zones of spatial curved beams on structural performance,this sudy employed numerical analysis methods to establish a spatial analysis model for the entire bridge.By adjusting the length of the cable-free zone,the internal forces and deformations of the main beam,horizontal deformation of the main tower,and cable forces of the cable-stayed bridge with a wide curved section were analyzed under four different curvature radi.The research results showed that when the cable-free zone at the root of the main tower and the cable-free zone at the edge support are maintained at 0.08-0.24 times and 0.04-0.12 times the main span,respectively,the deformation and internal forces of the main beam are moderate,while the eccentricity of the main beam section at the root of the tower is minimized and the bending torsional coupling spatial stress of the bridge structure becomes more reasonable.

关 键 词：部分斜拉桥 曲线梁 宽幅 无索区长度 空间受力 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]