|Table of Contents|

Secondary Stress Analysis of Main Cable of Suspension Bridge Considering Bending Rigidity(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2010年03期
Page:
59-64
Research Field:
Publishing date:
2010-09-20

Info

Title:
Secondary Stress Analysis of Main Cable of Suspension Bridge Considering Bending Rigidity
Author(s):
NIE Li-fang1;  SHEN Rui-li1;  TANG Mao-lin1;  SHEN Wang2
1. Department of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Zhejiang Provincial Construction Headquarters of Zhoushan Islands Link Project, Zhoushan 316000, Zhejiang, China
Keywords:
suspension bridge;  secondary stress;  main cable;  bending rigidity;  BNLAS
PACS:
U448.25
DOI:
-
Abstract:
In order to study the secondary stress of main cable of suspension bridge considering the bending rigidity, authors took a main-span of 730 m with twin-towers and single-span suspension bridge as example. The main cable was simulated with composite unit of cable unit and spatial beam unit. Then the finite element model was established by using bridge nonlinear analysis software BNLAS. The effects of bending rigidity on the main cable secondary stress of side-span and main-span were analyzed by way of changing the beam unit bending moment of inertia of composite unit. At the same time, the secondary stress was studied when the stiffening girder was lifted from bridge towers to the mid-span, as well as from the mid-span to bridge towers to research the secondary stress during the process of lifting. Finally, the secondary stresses with different levels of long-span suspension bridge under a variety of loads were analyzed theoretically, and compared with the finite element results. Results show that the effect of bending moment of main cable on secondary stress is very small, and the process of lifting has significant impact on secondary stress. The smaller the span is, the greater the secondary stress is under dead load state.

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Last Update: 2010-09-20