论文部分内容阅读
以在建主跨为1 080 m的三塔双跨悬索桥——泰州长江公路大桥为工程背景,采用三维非线性空气动力稳定性分析方法,分析主缆矢跨比、加劲梁恒载集度、加劲梁支承方式、中塔型式、缆索体系等结构参数对三塔悬索桥空气动力稳定性的影响,并探讨了具有良好抗风稳定性的三塔悬索桥的结构布置形式。结果表明:三塔悬索桥主缆的矢跨比在1/10~1/11范围内,主梁跨中设置刚性中央扣,增强中间桥塔的纵桥向刚度以及采用空间缆索体系或平面双缆体系时,可以获得较好的空气动力稳定性。
Based on the three-tower double-span suspension bridge-Taizhou Yangtze River Highway Bridge with a span of 1 080 m, the three-dimensional nonlinear aerodynamic stability analysis method is used to analyze the ratio of main-span ratio, stiffening concentration of stiffening girder, The influence of structural parameters such as supporting mode, medium tower type and cable system on the aerodynamic stability of the three-tower suspension bridge is discussed. The structural layout of the three-tower suspension bridge with good wind stability is also discussed. The results show that the span ratio of the main cable of the three-tower suspension bridge is in the range of 1/10 to 1/11, the central span of the main beam is provided with a rigid central buckle to enhance the longitudinal bridge stiffness of the intermediate bridge tower and the space cable system or plane double cable System, you can get better aerodynamic stability.