Publication detail

Why is the initial Trend of Deflections of Girder Bridges Deceptive?

KŘÍSTEK, V. BAŽANT, Z. ZICH, M. KOHOUTKOVÁ, A.

Original Title

Why is the initial Trend of Deflections of Girder Bridges Deceptive?

Type

conference paper

Language

English

Original Abstract

Long-span prestressed concrete box girders typically exhibit deceptively small deflections, possibly even upwards. However, after about 3 to 10 years, deflections may begin to increase rapidly. To predict deflections correctly, a creep and shrinkage model that realistically describes the moisture diffusion process must be used to calculate the delay of shrinkage and drying creep of the thick bottom slab. The effects of this delay are discussed, and comparisons are made to measured deflections of actual structures.

Keywords

box girder bridges; creep; drying; humidity effects; long-term deflections; prestressed concrete; serviceability; shrinkage

Authors

KŘÍSTEK, V.; BAŽANT, Z.; ZICH, M.; KOHOUTKOVÁ, A.

RIV year

2005

Released

28. 9. 2005

Publisher

Concreep

Location

Nates, Francie

Pages from

294

Pages to

298

Pages count

7

BibTex

@inproceedings{BUT18010,
  author="Vladimír {Křístek} and Zdeněk P. {Bažant} and Miloš {Zich} and Alena {Kohoutková}",
  title="Why is the initial Trend of Deflections of Girder Bridges Deceptive?",
  booktitle="Proceedings of Concreep 7",
  year="2005",
  series="2005",
  number="1",
  pages="294--298",
  publisher="Concreep",
  address="Nates, Francie"
}