|Table of Contents|

Prediction model and influencing factors for concrete shrinkage and creep effects(PDF)

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

Issue:
2013年02期
Page:
56-62
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Prediction model and influencing factors for concrete shrinkage and creep effects
Author(s):
MENG Jiang12 ZHAO Bao-jun13 LIU Jian-mei2
1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Shaanxi Provincial Highway Survey and Design Institute, Xi'an 710071, Shaanxi, China; 3. Shaanxi Provincial Communication Construction Group, Xi'an 710075, Shaanxi, China
Keywords:
bridge engineering concrete shrinkage and creep prediction model influencing factor
PACS:
U414.1
DOI:
-
Abstract:
In order to forecast the influence of concrete shrinkage and creep on the performance of structures, the CEB-FIP model, ACI model, BP model and GL—2000 model were adopted respectively to calculate and analyze the shrinkage and creep of concrete and the results acquired with various calculating methods were compared under identical conditions. The results show that the theoretical thickness of structures is very sensitive to shrinkage and creep of concrete, but the creep coefficient is not sensitive to theoretical thickness of structures; the creep effect of concrete decreases with the increase of loading period; when loading period increases from 3 days to 28 days, the final value of concrete creep effect is reduced by about 80%; shrinkage and creep effect are very sensitive to average relative humidity of environment, when the average relative humidity of environment is enhanced from 50% to 80%, the creep effect is reduced by approximately 30%, while the shrinkage effect is reduced by as much as 50%; comparatively, the change of environmental relative humidity imposes greater influence on shrinkage effect than on creep effect of concrete. 1 tab, 4 figs, 23 refs.

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Last Update: 2013-04-20