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Geometrical nonlinearity under live load for three-tower suspension bridges(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2011年04期
Page:
45-49,57
Research Field:
Publishing date:
2011-08-20

Info

Title:
Geometrical nonlinearity under live load for three-tower suspension bridges
Author(s):
LIANG Peng1;  WU Xiang-nan1;  LI Wan-heng2;  XU Yue1
1. Key Laboratory for Highway Bridge and Tunnel of Shaanxi Province, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Key Laboratory of Old Bridge Detection and Reinforcement Technique, Highway Research Institute of Ministry of Transport, Beijing 100088, China
Keywords:
bridge engineering;  three-tower suspension bridge;  response under live load;  geometrical nonlinearity;  linear deflection theory;  total CR formulation;  incremental UL formulation;  key response
PACS:
U441.2
DOI:
-
Abstract:
Taizhou Yangtze River Bridge with 2×1 080 m span was taken as the study object, and 3 methods, such as linear deflection theory, incremental UL formulation and total CR formulation were employed to compute three main factors such as deflection-to-span ratio of main girder, force in the mid-tower and anti-slipping safety factor between the main cable and saddle, and the geometrical nonlinearity under live load was studied. It is concluded that: the accuracy and efficiency of computation of total CR formulation is highest, but developing special software independently is needed; the maximum error of incremental UL formulation is no more than 0.3%; the errors of the three main factors calculated by linear deflection theory are 6.6%, 4.5% and -2.64% respectively. The errors are somewhat greater, so the linear deflection theory can not meet the requirements of refined analysis. 3 tabs, 3 figs, 8 refs.

References:

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Memo

Memo:
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Last Update: 2011-08-20