Meso-scale modelling of steel fibre reinforced concrete with high strength

Abstract

Based on Delaunay triangulation, a 3D meso-scale model is successfully developed and verified. This approach modelling fibre and concrete separately and linking them with slide line contact has the capability to truly reflect the interfacial behaviour of fibre and mortar, and thus achieve high fidelity of numerical simulations. However, meso-scale modelling usually means tremendous complexity and long computational time. This paper proposes a model to achieve relatively high computation efficiency, as well as accuracy. Besides, the model has the potential to deal with small specimens cut from steel fibre reinforced concrete (SFRC) blocks.

Numerical investigation on effects of steel fibers content on flexural behavior of UHPCC

“…In this study, steel fibers are simulated with five percentages of fibers: 0%, 0.5%, 1.0%, 1.5% and 2%, with the help of randomly distribution regarding to previous studies (Liang and Wu, 2018, Fang and Zhang, 2013, Barnett et al, 2010. The model with 1% is shown in Figure 3.…”

“…In addition, some of researchers are presented the different methods for simulation of steel fiber reinforced concrete and have investigated the role of different characteristics of steel fibers Zhang, 2013, Liang and. Liang et al (Liang and Wu, 2018) have presented Meso-scale modeling of steel fiber reinforced concrete (SFRC) with high compressive strength, high tensile strength and high flexural strength of SFRC. Fang et al (Fang and Zhang, 2013) have proposed three-dimensional (3D) modeling of steel fiber reinforced concrete material under intense dynamic loading.…”

Steel Fibre Reinforced Concrete Meso‐Scale Numerical Analysis

“…e experimental and numerical results prove that numerical analysis is an important tool for SFRC research. e use of finite element software can make it easier to study the SFRC interface [28][29][30] and derive an SFRC numerical constitutive model [31][32][33], secondary development, and application [34]. In 2010, Radtke [28] proposed to build a model using the concept of discrete fibre.…”

“…Pros et al [29] applied the numerical immersed boundary approach and a phenomenological meso-model for concretefibre interaction. Liang and Wu [30] modelled fibre and concrete separately and linked them with slide line contact to truly reflect the interfacial behaviour of fibre and mortar. Guillermo [31] (2012) used the discrete crack formula to simulate the constitutive, mesoscopic, and macroscopic observations of the SFRC fracture behaviour.…”

A novel framework for modelling the 3D mesostructure of steel fibre reinforced concrete

“…As a solution the Delaunay triangulation technique was implemented to improve the meshing process, which allowed the 1D fibres to be appropriately linked to the three-dimensional (3D) matrix elements [30]. In the current work, the Delaunay triangulation strategy will be employed to generate short fibres at the desired locations according to the model framework proposed.…”