Mechanics Properties Analysis for Continuous Multi-spanLow Pylon Cable-stayed Bridge
[1]WANG Yan,GU Dingyu,CHEN Huai.Mechanics Properties Analysis for Continuous Multi-spanLow Pylon Cable-stayed Bridge[J].Journal of Zhengzhou University (Engineering Science),2012,33(01):32-35.[doi:10.3969/j.issn.1671-6833.2012.01.008]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
33卷
Number of periods:
2012 01
Page number:
32-35
Column:
Public date:
2012-01-10
- Title:
- Mechanics Properties Analysis for Continuous Multi-spanLow Pylon Cable-stayed Bridge
- CLC:
- U448.27
- DOI:
- 10.3969/j.issn.1671-6833.2012.01.008
- Abstract:
- The 2nd Yellow River bridge in Kaifeng is a double plane prestressed concrele cable-slayed bridgewith 7 low pylons and 8 spans. "The bridge was taken as the object of study and mechanics properties analysisof it had been made by adopting finite element program Midas/eivil. The results indicate that stay cables un.dertake more vertical loads because of the bigger ratio between height of king pylons and spans of girder, sothe height and internal force of the girder sections at supporting points can be decreased effectively; the inter.nal forces and deformations of the girder display an characteristic as well as multi-span continuous beams, thewhole sections of girder are all under compressive stress basieally, axis force distribulion is uniform , the posi.tive bending moment appears at the supporting points of girder and it is larger than the hogging moment at themid-spans; the stiffness of girder is large, because the deformation of girder gives priority to the smaller upwards vertical deformation ; the king pylons only serve as a steering column for stay cables and foree in longitudinal direction is smaller, the displacements at the top of pylons in the longitudinal direction of bridge is sosmall that in scale of medium spans, the scheme of low pylons cahle-stayed bridge can sovle the problem olstiflmess of multi-span cable-stayed bridge; The tension forces of cables at both sides of each pylon increasegradually from inside to outside, the force of cables of side-span is largest, and the growth of cables stress un.der live loads is very small; the bridge under asymmetric loads is disadvantageous, the stress and deformationof control section of each members are all in the range of the standard of criterion and have great safety stor.age,the structure of bridge is reasonable under loadg.
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Last Update:
1900-01-01