Some aspects of 2D and/or 3D numerical modelling of reinforced and prestressed concrete structures

Abstract

Purpose -To provide an insight in one relatively simple and efficient numerical model for analysing reinforced and prestressed concrete structures, and to raise a discussion leading to the creation of one universal and robust 3D algorithm. Design/methodology/approach -A new numerical model for analysing reinforced and prestressed concrete structures is developed and main theoretical details are described to aid the understandings. The approach is clear, easily readable and the body of the text is divided into logical sections starting from theoretical explanations ending in the large number of different practical examples. Findings -Provides information about developing new and relatively simple numerical model for analysing reinforced and prestressed concrete structures, indicating what can be improved. Recognises the lack of knowing real behaviour of 3D concrete and starts a discussion on it.Research limitations/implications -The knowledge of the 2D and especially 3D concrete behaviour is still poor and the concrete model developers use many simplifications. So, many new experiments should be performed and better numerical models should be developed. There is large area for researchers but having in mind that experiments are very expensive. Practical implications -Obtained results of the 3D analysis of reinforced and prestressed concrete structures can stand as a benchmark for future researches in this field especially to the young researchers and concrete model developers. Originality/value -This paper presents new and very simple numerical model for analysing reinforced and prestressed concrete structures. Paper could be very valuable to the researchers in this field as a benchmark for their analyses.

A Voronoi Based Discrete Numerical Approach for Modelling Reinforcement in Concrete Structures

“…In the embedded reinforcement model [43,44], inside the concrete, we embed reinforcement independent of the finite elements mesh. For the discretisation of reinforcement, we use 1D elements by embedding them within 2D or 3D concrete elements.…”

Staged‐construction analysis of high‐rise buildings: A literature review and future perspectives

“…Instead of two-dimensional modeling, many researchers have adopted three-dimensional modeling to conduct SCA of RC buildings. 15,32,38,82 Marovic et al 83 recommended using three-dimensional models especially in HRB analysis to have the freedom in prescribing the location and geometry of all structural elements. Serror and Essam El-Din 18 reported that floors in HRB should be investigated within a complete model for the whole structure because SCA may change their internal forces.…”

Model for the Simulation of the Time-Dependent State in RC Elements

“…In the calculating procedure, if the value of the strain in each direction exceeds the prescribed maximum strain value in a Gauss point, the modulus of elasticity for that direction becomes 0, and material failure occurs in that direction. All mathematical formulations necessary for describing these procedures are defined in detail in [20][21][22].…”

“…The assumption is that the reinforcement transmits only the longitudinal tensile and compressive forces, so its behaviour can be approximated by a uniaxial stress state. In this model, a uniaxial elasto-viscoplastic model that includes potential hardening and elastic unloading is used [20][21][22].…”

“…In the developed model, the reinforcement bars in the global concrete mesh are described by a 1D elasto-viscoplastic model, and their position is arbitrary in space (Figure 4). These reinforcement bars are presented by a second-order space function determined by its projections [20,22].…”