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Analysis of Web Anti-crack Sensitivity and Tendon-collocating Optimization for Long-span Prestressed Concrete Box-girder Bridge(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2011年03期
Page:
29-33
Research Field:
Publishing date:
2011-09-20

Info

Title:
Analysis of Web Anti-crack Sensitivity and Tendon-collocating Optimization for Long-span Prestressed Concrete Box-girder Bridge
Author(s):
ZHAO Qi-lin;  DING Yong;  ZHAI Ke-wei
School of Engineering Corps, PLA University of Science and Technology, Nanjing 210007, Jiangsu, China
Keywords:
inclined crack;  long-span;  prestressed concrete box-girder bridge;  web;  sensitivity
PACS:
U448.213
DOI:
-
Abstract:
The inclined cracks in webs of prestressed concrete box-girder bridge with suspended construction took place frequently, and it was more common in these with pure vertical tendons than those with bending ones. Comparison of web anti-crack property was conducted between them with the method of sensitivity analysis. Bending tendons were proved not to overcome the principal stress due to vertical tensile stress with the fact that vertical tensile stress exists as well as shear in webs. The need of mixed configuration with bending tendons and vertical ones was highlighted, and suitable proportion between vertical and bending tendons was given. The results indicate the webs with bending tendons are more reliable than those with pure vertical ones obviously even under the same condition.

References:

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Last Update: 2011-09-20