A multiscale model for reinforced concrete with macroscopic variation of reinforcement slip
Artikel i vetenskaplig tidskrift, 2018

A single-scale model for reinforced concrete, comprising the plain concrete continuum, reinforcement bars and the bond between them, is used as a basis for deriving a two-scale model. The large-scale problem, representing the “effective” reinforced concrete solid, is enriched by an effective reinforcement slip variable. The subscale problem on a Representative Volume Element (RVE) is defined by Dirichlet boundary conditions. The response of the RVEs of different sizes was investigated by means of pull-out tests. The resulting two-scale formulation was used in an FE2 analysis of a deep beam. Load–deflection relations, crack widths, and strain fields were compared to those obtained from a single-scale analysis. Incorporating the independent macroscopic reinforcement slip variable resulted in a more pronounced localisation of the effective strain field. This produced a more accurate estimation of the crack widths than the two-scale formulation neglecting the effective reinforcement slip variable.

Reinforced concrete

Multiscale

Bond-slip

Computational homogenisation

Cracking

Författare

Adam Sciegaj

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Fredrik Larsson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Karin Lundgren

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Filip Nilenius

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Kenneth Runesson

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Computational Mechanics

0178-7675 (ISSN) 1432-0924 (eISSN)

Flerskalig modellering av armerad betong

Vetenskapsrådet (VR), 2015-01-01 -- 2018-12-31.

Ämneskategorier

Teknisk mekanik

Annan samhällsbyggnadsteknik

Styrkeområden

Building Futures

Materialvetenskap

Infrastruktur

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1007/s00466-018-1588-3

Mer information

Senast uppdaterat

2018-06-21