Finite element modeling of confined concrete-I: Drucker–Prager type plasticity model

Focusing on the member end rotation due to strain penetration along reinforcing bars fully anchored in footings and bridge joints, this paper introduces a hysteretic model for the reinforcing bar stress versus slip response. This model can be integrated into fiber-based analysis of concrete structures using a zero-length section element. The authors demonstrate the ability of the proposed hysteretic model to capture the strain penetration effects by simulating the measured global and local responses of two concrete columns and a bridge T-joint system. Findings show that the analysis of concrete structures will appreciably underestimate the local response parameters that are used to quantify structural damage unless the strain penetration effects are satisfactorily modeled.

Modeling of Strain Penetration Effects in Fiber-Based Analysis of Reinforced Concrete Structures

Finite element modeling of confined concrete-II : plastic-damage model

Multi-scale modeling of structural concrete performance is presented as a systematic knowledge base of coupled cementitious composites and structural mechanics. An integrated computational scheme is proposed for life-span simulation of reinforced concrete. Conservation of moisture, carbon dioxide, oxygen, chloride, calcium and momentum is solved with hydration, carbonation, corrosion, ion dissolution, damage evolution and their thermodynamic/mechanical equilibrium. The holistic system is verified by the reality.

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Multi-scale Modeling of Concrete Performance Integrated Material and Structural Mechanics

Experimental and numerical investigation on progressive collapse resistance of reinforced concrete beam column sub-assemblages

Part 1: Analysis and Modeling of Reinforced Concrete 1 Introduction 2 Two-Dimentional Analysis of Reinforced Concrete 3 Three-Dimentional Analysis of Reinforced Concrete 4 Analysis of Underground Structure and Soil-Structure Interactions 5 Analysis of Shell and Framed Structure 6 Analysis of Strengthened/Retrofitted Structures with Steel Encasement and Fiber Reinforced Wrapping 7 Analysis of Pre-Cracked Reinforced Concrete Member in Shear and Effect of Path-Dependency Part 2: Constitutive Model of Reincorced Concrete 8 Analysis of Stress Transfer Across Interface in Reinforced Concrete 9 Elasto-Plastic Fracture Model for Un-Cracked Concrete 10 Stress Transfer Across Crack in Reinforced Concrete Through Aggregate Interlock Action 11 Bond and Tensile Mechanics of Reinforced Concrete 12 Reinforcing Bar Model Under Arbitrary Loading Paths

Nonlinear mechanics of reinforced concrete

This paper presents the results of an experimental study on the compressive behavior of circular and noncircular concrete columns confined by polyethylene terephthalate (PET) fiber-reinforced polymer (FRP). The main objective of this study is to observe the compressive behavior of PET FRP–confined noncircular concrete columns, in which the cross-sectional geometry significantly influences the effectiveness of FRP confinement. For this purpose, 54 specimens were tested under monotonic axial compression. The parameters considered were the cross-sectional shape (i.e., circular, square, and rectangular), the corner radius in case of square and rectangular specimens, and the number of FRP layers. The results of this study showed that, unlike the bilinear stress-strain response of square and rectangular concrete columns confined by other FRP materials, PET FRP–confined square and rectangular concrete columns exhibit a distinct trilinear relationship. Owing to the large rupture strain (LRS) characteristi...

Amorn Pimanmas

Papers

Nonlinear mechanics of reinforced concrete

Compressive Behavior of PET FRP–Confined Circular, Square, and Rectangular Concrete Columns

Shear strength of beam–column joint with enlarged joint area

Strengthening R/C beams with opening by externally installed FRP rods: Behavior and analysis

Lateral response of PET FRP-confined concrete