|Table of Contents|

Shrinkage and creep effect of steel-concrete composite deck on steel truss bridge with double-decks

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

Issue:
2010年05期
Page:
52-57
Research Field:
Publishing date:
2010-10-20

Info

Title:
Shrinkage and creep effect of steel-concrete composite deck on steel truss bridge with double-decks
Author(s):
LIU Yong-jian;  LIU Jian;  GAO Yi-min;  ZHANG Kai-bin
School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China
Keywords:
bridge engineering;  steel-concrete composite structure;  shrinkage and creep;  rigid cable;  double deck
PACS:
U448.25; TU317.1
DOI:
-
Abstract:
To study the shrinkage and creep effect of steel-concrete composite deck on steel truss bridge with double decks, based on Dongjiang Bridge, a steel truss bridge stiffened with rigid cable, a finite element method was used to analyze the shrinkage and creep effect on stress of deck and deflection of mid-span under different loading ages, in which an appropriate calculation method of shrinkage and creep was adopted, and also the time-varying effect of concrete’s elastic modulus was considered. According to the mechanical behavior of the bridge, the shrinkage and creep effect of concrete on the stress of main truss and rigid cables were studied under 180 d loading age. The results show that the later the loading age of concrete, the smaller the effect of shrinkage and creep. And the shrinkage effect on the stress of bridge deck was larger, but the creep effect was about 30% of that of shrinkage. Shrinkage and creep have greater effect on stress of some members in main trusses, which made the upper chord of mid-span increase 22%, but lesser on rigid cables stress and mid-span deflection. Overall, for the structure characteristics of the rigid cables and double-decks, the shrinkage and creep effect on the mechanical properties of Dongjiang Bridge present significant spatiality. 1 tab, 7 figs, 13 refs.

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Last Update: 2010-10-20