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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
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" }