|Table of Contents|

Influence of welding residual stress on stability of steel truss cable-stayed bridge(PDF)

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

Issue:
2011年06期
Page:
36-42
Research Field:
Publishing date:
2011-12-20

Info

Title:
Influence of welding residual stress on stability of steel truss cable-stayed bridge
Author(s):
PENG Chong-mei;  ZHANG Qi-wei;  LI Yuan-bing
School of Civil Engineering, Tongji University, Shanghai 200092, China
Keywords:
bridge engineering;  steel truss cable-stayed bridge;  welding residual stress;  temperature field;  initial stress;  stability
PACS:
U445.5
DOI:
-
Abstract:
Taking Yellow River bridge in Zhengzhou as an example, the 3D FE model of the pylons-main truss connection joint was built. Regarding the variation of physical properties of materials have relation with temperature, the welding temperature field and welding residual stress at the weld joint of the pylons-main truss connection were modeled with numerical method, the effects of welding residual stress on the stability of bridge were studied. The distribution of temperature during welding process was simulated by thermodynamics analysis, the welding residual stress at the weld joint of the pylons-main truss connection was calculated by regarding temperature field as load. By regarding welding residual stress as initial stress after simplification treatment, the effects of welding residual stress on the stability of bridge were presented. The calculation results show that the coefficient of stability decrease by 13% when initial stress is applied to both bottom cross girders and upper chords of middle truss. Therefore, the effects of initial stress on stability in welded truss bridge should be paid enough attention. 1 tab, 12 figs, 15 figs.

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Last Update: 2011-12-20