|Table of Contents|

Design of Late Spare Tendon for Long-span PC Box Girder Bridge Based on Uncertainty Analysis(PDF)

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

Issue:
2010年03期
Page:
1-7
Research Field:
Publishing date:
2010-09-20

Info

Title:
Design of Late Spare Tendon for Long-span PC Box Girder Bridge Based on Uncertainty Analysis
Author(s):
PAN Zuan-feng;  LU Zhi-tao
Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China
Keywords:
long-span PC box girder bridge;  spare tendon;  Latin hypercube sampling;  creep;  shrinkage;  prestress loss
PACS:
U448.35
DOI:
-
Abstract:
Uncertainty analysis method of the time-dependent effect for long-span prestressed concrete(PC)box girder was introduced. Latin hypercube sampling(LHS)method was adopted to improve sampling precision and decrease sampling number in numerical simulation. The time-dependent deformation at mid-span due to concrete creep and shrinkage was analyzed, and the confidence interval of the deformation at mid-span was provided, considering modeling uncertainties and random properties of influencing factors. Moreover, the efficiencies of different arrangement schemes of spare tendons were compared, and the determination of spare tendons was performed according to the differences between the lower limit of the confidence interval of the deformation and the certain value of that. The results show that external tendons and curved tendons are more effective on improving long-term deflection.

References:

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Last Update: 2010-09-20