Lattice Discrete Particle Modeling of Reinforced Concrete Flexural Behavior

Mohammed Alnaggar, Daniele Pelessone, Gianluca Cusatis

Research output: Contribution to journalArticle

Abstract

Modern structural design relies heavily on accurate numerical simulations of materials and structures. For concrete and RC, however, available computational models, although successful for many applications, fail to a large extent to correctly capture complex failure mechanisms. This is the case, for example, for failures occurring in regions in which the assumptions of classical structural theories do not apply and for situations characterized by extensive fracture and size effect. To overcome this issue, this paper investigates the use of a discrete mesoscale model, the so-called lattice discrete particle model (LDPM), for simulation of the flexural behavior of RC structural elements. LDPM captures naturally complex fracture phenomena in a variety of loading conditions because it simulates material heterogeneity. This is obtained by replacing the actual concrete internal structure with a system of polyhedral cells interacting through nonlinear and fracturing lattice struts. The results presented in this paper show that LDPM can be used to predict with great accuracy the ultimate flexural behavior of RC beams with a wide range of main and secondary reinforcements. LDPM predicts very well the transition from ductile to brittle behavior for increasing reinforcement ratios in slender and stocky beams, and, most importantly, predicts the quasi-brittle characteristics of failure and the associated size effect.

LanguageEnglish (US)
Article number04018231
JournalJournal of Structural Engineering (United States)
Volume145
Issue number1
DOIs
StatePublished - Jan 1 2019

Fingerprint

Computation theory
Reinforced concrete
Reinforcement
Concretes
Struts
Structural design
Engineers
Computer simulation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{a7ffbf555c37495895aa8dcdc68eac0f,
title = "Lattice Discrete Particle Modeling of Reinforced Concrete Flexural Behavior",
abstract = "Modern structural design relies heavily on accurate numerical simulations of materials and structures. For concrete and RC, however, available computational models, although successful for many applications, fail to a large extent to correctly capture complex failure mechanisms. This is the case, for example, for failures occurring in regions in which the assumptions of classical structural theories do not apply and for situations characterized by extensive fracture and size effect. To overcome this issue, this paper investigates the use of a discrete mesoscale model, the so-called lattice discrete particle model (LDPM), for simulation of the flexural behavior of RC structural elements. LDPM captures naturally complex fracture phenomena in a variety of loading conditions because it simulates material heterogeneity. This is obtained by replacing the actual concrete internal structure with a system of polyhedral cells interacting through nonlinear and fracturing lattice struts. The results presented in this paper show that LDPM can be used to predict with great accuracy the ultimate flexural behavior of RC beams with a wide range of main and secondary reinforcements. LDPM predicts very well the transition from ductile to brittle behavior for increasing reinforcement ratios in slender and stocky beams, and, most importantly, predicts the quasi-brittle characteristics of failure and the associated size effect.",
author = "Mohammed Alnaggar and Daniele Pelessone and Gianluca Cusatis",
year = "2019",
month = "1",
day = "1",
doi = "10.1061/(ASCE)ST.1943-541X.0002230",
language = "English (US)",
volume = "145",
journal = "Journal of Structural Engineering",
issn = "0733-9445",
publisher = "American Society of Civil Engineers (ASCE)",
number = "1",

}

Lattice Discrete Particle Modeling of Reinforced Concrete Flexural Behavior. / Alnaggar, Mohammed; Pelessone, Daniele; Cusatis, Gianluca.

In: Journal of Structural Engineering (United States), Vol. 145, No. 1, 04018231, 01.01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Lattice Discrete Particle Modeling of Reinforced Concrete Flexural Behavior

AU - Alnaggar, Mohammed

AU - Pelessone, Daniele

AU - Cusatis, Gianluca

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Modern structural design relies heavily on accurate numerical simulations of materials and structures. For concrete and RC, however, available computational models, although successful for many applications, fail to a large extent to correctly capture complex failure mechanisms. This is the case, for example, for failures occurring in regions in which the assumptions of classical structural theories do not apply and for situations characterized by extensive fracture and size effect. To overcome this issue, this paper investigates the use of a discrete mesoscale model, the so-called lattice discrete particle model (LDPM), for simulation of the flexural behavior of RC structural elements. LDPM captures naturally complex fracture phenomena in a variety of loading conditions because it simulates material heterogeneity. This is obtained by replacing the actual concrete internal structure with a system of polyhedral cells interacting through nonlinear and fracturing lattice struts. The results presented in this paper show that LDPM can be used to predict with great accuracy the ultimate flexural behavior of RC beams with a wide range of main and secondary reinforcements. LDPM predicts very well the transition from ductile to brittle behavior for increasing reinforcement ratios in slender and stocky beams, and, most importantly, predicts the quasi-brittle characteristics of failure and the associated size effect.

AB - Modern structural design relies heavily on accurate numerical simulations of materials and structures. For concrete and RC, however, available computational models, although successful for many applications, fail to a large extent to correctly capture complex failure mechanisms. This is the case, for example, for failures occurring in regions in which the assumptions of classical structural theories do not apply and for situations characterized by extensive fracture and size effect. To overcome this issue, this paper investigates the use of a discrete mesoscale model, the so-called lattice discrete particle model (LDPM), for simulation of the flexural behavior of RC structural elements. LDPM captures naturally complex fracture phenomena in a variety of loading conditions because it simulates material heterogeneity. This is obtained by replacing the actual concrete internal structure with a system of polyhedral cells interacting through nonlinear and fracturing lattice struts. The results presented in this paper show that LDPM can be used to predict with great accuracy the ultimate flexural behavior of RC beams with a wide range of main and secondary reinforcements. LDPM predicts very well the transition from ductile to brittle behavior for increasing reinforcement ratios in slender and stocky beams, and, most importantly, predicts the quasi-brittle characteristics of failure and the associated size effect.

UR - http://www.scopus.com/inward/record.url?scp=85056277332&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056277332&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)ST.1943-541X.0002230

DO - 10.1061/(ASCE)ST.1943-541X.0002230

M3 - Article

VL - 145

JO - Journal of Structural Engineering

T2 - Journal of Structural Engineering

JF - Journal of Structural Engineering

SN - 0733-9445

IS - 1

M1 - 04018231

ER -