Publication detail

Shear at the Interface between Composite Parts of Prestressed Concrete Section

NAVRÁTIL, J. ZVOLÁNEK, L.

Original Title

Shear at the Interface between Composite Parts of Prestressed Concrete Section

Type

conference paper

Language

English

Original Abstract

Composite concrete beams made of prefabricated prestressed or non-prestressed element and cast-in-place reinforced concrete slab became very popular in present-day civil engineering practice. Two concrete composite parts of beam are cast at different times. Different moduli of elasticity, consecutive load application, and differential creep and shrinkage cause unequal strains and stresses in two adjacent fibers of construction joint. The requirement is to ensure that both parts act fully compositely, because the bending and shear designs of composite members are based on this assumption. Therefore the level of shear stresses at the interface between two parts must be limited. The objective of the paper is to review the methods for the calculation of shear stresses in construction joint, and to evaluate the influence of different age of two concrete composite parts on the level of shear stresses. Calculation method alternative to Eurocode 2 method is proposed and tested. It is recommended to calculate the shear stress from difference of normal forces acting on sectional components in two neighboring sections of the element. It was observed that differential shrinkage of concrete components can significantly affect the stress distribution. Numerical studies were performed based on real-life examples of composite beams.

Keywords

composite concrete beams; Eurocode; design; construction joint; shear; creep; shrinkage; stress redistribution

Authors

NAVRÁTIL, J.; ZVOLÁNEK, L.

RIV year

2014

Released

20. 12. 2014

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

978-3-03835-442-0

Book

Advanced Engineering and Technology

Edition

softcover, 2-part-set

Edition number

1

ISBN

1660-9336

Periodical

Applied Mechanics and Materials

Year of study

752-753

Number

449

State

Swiss Confederation

Pages from

763

Pages to

768

Pages count

6

BibTex

@inproceedings{BUT109680,
  author="Jaroslav {Navrátil} and Lukáš {Zvolánek}",
  title="Shear at the Interface between Composite Parts of Prestressed Concrete Section",
  booktitle="Advanced Engineering and Technology",
  year="2014",
  series="softcover, 2-part-set",
  journal="Applied Mechanics and Materials",
  volume="752-753",
  number="449",
  pages="763--768",
  publisher="Trans Tech Publications",
  address="Switzerland",
  doi="10.4028/www.scientific.net/AMM.752-753.763",
  isbn="978-3-03835-442-0",
  issn="1660-9336"
}