Mechanical analysis and parametric study of long-span partially earth-anchored cable-stayed bridge

被引：4

作者：

Xiao, Rucheng ^{[1
]}

Wei, Pu ^{[1
]}

Sun, Bin ^{[1
]}

机构：

[1] Department of Bridge, Tongji University

来源：

Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2013年 / 43卷 / 05期

关键词：

Analytical methodology; Cable-stayed bridge; Long-span; Mechanical analysis; Parametric study; Partially earth-anchored;

D O I：

10.3969/j.issn.1001-0505.2013.05.032

中图分类号：

学科分类号：

摘要：

Analytical research and parametric study are carried out to learn the mechanical behavior of long-span partially earth-anchored cable-stayed bridge and to determine the rational designing parameters. Equilibrium differential equations of long-span partially earth-anchored cable-stayed bridges are derived based on a continuous model and approximate solutions are obtained. A series of estimating formulae of the key structural responses are provided. Calculating outcomes are compared with that of a finite element model. Parametric study of the side-span ratio, pylon height, beam stiffness, pylon stiffness and supporting stiffness of earth-anchored cable is then performed based on the estimating formulae and several designing advices are proposed. Numerical results show that the estimating formulae have sound accuracy with errors less than 15%, which can meet the requirment in conceptual design stage. Parametric study shows that the optimal side-span ratio is around 0.3 and reasonable height of pylon is identical to conventional cable-stayed bridges. Rigidity of beam and pylon has minor impact on the mechanical behavior of the whole structure while the influence of the supporting stiffness of earth-anchored cable is significant.

引用

页码：1097 / 1103

页数：6

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