地锚式独塔单跨空间双缆面悬索桥结构体系分析
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U448.25

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国家自然科学基金“大跨径预应力混凝土箱梁桥性能退化过程及衰变机理”(51678061)


Structural System Analysis of Ground Anchored Single-tower and Single-span Spatial Double-cable Suspension Bridge
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    摘要:

    为了得到某地锚式独塔单跨空间双缆面悬索桥合理的结构参数,采用有限元软件计算的方法,研究了该地锚式悬索桥在恒载、活载、温度荷载作用下分别采用1/14、1/15、1/16的垂跨比、45o、60o、75o的边跨主缆锚固方式、π型钢梁和钢桁梁两种加劲梁形式对主缆、吊杆受力及主梁的内力、挠度的变化影响。结果表明:随着垂跨比的增大,主缆、边吊杆受力及主梁的内力和挠度、塔底弯矩逐渐减小;随着锚固角度的增大,主缆背索力、主梁弯矩及挠度、塔底弯矩随之减小,主跨主缆力影响较小。适当增加垂跨比及边跨主缆锚固角度,可改善结构的受力与变形。采用钢桁梁截面形式,主缆力及吊杆力较π型钢梁的大,主梁挠度较π型钢梁的小。相关研究结论将会为该类桥梁的设计结构参数的拟定提供参考。

    Abstract:

    In order to obtain the reasonable structural parameters of a ground anchored single-tower and single-span spatial double-cable suspension bridge, the finite element simulation method is used to study the main cable force, the hanger force, the internal force and deformationof the main beam of different rise-span ratio of 1/14, 1/15 and 1/16, main cable anchoring forms of 45o, 60o, 75o, stiffening beam forms of π-type steel beam and steel truss beam of this anchored suspension bridge under the dead load, live load, temperature load. The results show that with the increase of the rise-span ratio, the main cable and the side hanger stress, the internal force and deformation of the main beam, and the bending moment of the tower bottom are gradually reduced. With the increase of the anchoring angle, the back cable force of the main cable, the bending moment and deformation of the main beam, and the bending moment of the tower bottom are reduced, and main cable force of the main span is less affected by the anchoring angle. Appropriately increase the rise-span ratio and the anchoring angle of the main cable to improve stress and reduce deformation of the structure. In the form of steel truss beam section, The main cable force and the hanger force are larger than the π-type steel beam, and the main beam deformation is smaller than that of the π-type steel beam. Relevant research conclusions will provide reference for the formulation of design parameters of such bridges.

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赵煜,李畅畅,吴领领,等. 地锚式独塔单跨空间双缆面悬索桥结构体系分析[J]. 科学技术与工程, 2020, 20(22): 9202-9209.
Zhao Yu, Li Chang-chang, Wu Ling-ling, et al. Structural System Analysis of Ground Anchored Single-tower and Single-span Spatial Double-cable Suspension Bridge[J]. Science Technology and Engineering,2020,20(22):9202-9209.

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历史
  • 收稿日期:2019-10-15
  • 最后修改日期:2019-11-19
  • 录用日期:2020-01-07
  • 在线发布日期: 2020-08-25
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