Nonlinear Finite Element Analysis of FRP-Strengthened Reinforced Concrete Panels Under Blast Loads

2016 ◽  
Vol 13 (04) ◽  
pp. 1641002 ◽  
Author(s):  
Xiaoshan Lin ◽  
Y. X. Zhang
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Blast Resistance ◽  
Blast Loading ◽  
Element Model ◽  
Element Analysis ◽  
Strain Rate Effects ◽  
Concrete Panels ◽  
Tension And Compression

A finite element model is developed in this paper for numerical modeling of the structural responses of FRP-strengthened reinforced concrete panels under blast loading. Strain rate effects for concrete in tension and compression, steel reinforcements and FRP sheets are taken into account in the finite element model. The commercial explicit hydrocode LS-DYNA is employed to carry out the numerical analysis. The proposed finite element model is validated by comparing the computed results of a conventional reinforced concrete panel and FRP-strengthened reinforced concrete panels under blast loading with the test data from the literature. In addition, the effects of FRP thickness, retrofitted surface, standoff distance and the charge mass on the blast resistance of FRP-strengthened reinforced concrete panels are investigated in this paper.

Modeling of Steel-Reinforced Concrete Panels under Blast Loads

2014 ◽  
Vol 553 ◽  
pp. 100-105
Author(s):  
Xiao Shan Lin ◽  
Yi Xia Zhang ◽  
Paul Jonathan Hazell
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Strain Rate ◽  
Blast Loading ◽  
Element Model ◽  
Strain Rate Effect ◽  
Structural Behaviour ◽  
Steel Reinforced Concrete ◽  
Concrete Panels

In this study, a finite element model is developed for simulation of the structural behaviour of steel-reinforced concrete panels under blast loading using LS-DYNA. Pure Lagrangian formulation is applied in the finite element analysis, and the strain rate effect is taken into account in the material models of both concrete and steel. The finite element model is validated by comparing the computed results with experimental test results from the literature. Structural behaviour of concrete panel with different parameters under blast loading is also investigated. Keywords: Blast resistance; Finite element model; Reinforced concrete panel; Strain rate effect

Numerical Simulation on the Overturn Process of Towering Reinforced Concrete Chimney during Directional Demolition Blasting

2013 ◽  
Vol 444-445 ◽  
pp. 1145-1151
Author(s):  
Jian Bin Xie ◽  
Miao Fu ◽  
Chang Chang Wu ◽  
Deng Feng Hu ◽  
Yun He Du
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Constitutive Relation ◽  
Element Model ◽  
Internal Force ◽  
Modeling Method ◽  
Element Analysis ◽  
Reinforced Concrete Chimney

On the basis of plastic-elastic mechanics and finite element method, one selected 150m high reinforced concrete chimney was taken as the target in this paper to analyze the mechanical condition of directional demolition blasting, the capsizing time, the internal force of support abutment and constitutive relation of the chimney during directional blasting. A finite element model of the towering reinforced concrete chimney was established through separated modeling method by finite element analysis software LS-DYNA of ANSYS. Results show that the constitutive relation given by this paper conforms to reality. The finite element model of the towering reinforced concrete chimney established by separated modeling method is reasonable. The real overturn process, capsizing location and capsizing length of towering reinforced concrete chimney during directional demolition blasting are agree with that of numerical simulation.

scholarly journals Finite element analysis of flexural behavior of textile reinforced concrete slab

2021 ◽  
Vol 261 ◽  
pp. 02042
Author(s):  
Mingqiu Xu ◽  
Jianhua Shao ◽  
Baijian Tang ◽  
Hongming Li
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Concrete Slab ◽  
Element Model ◽  
Flexural Behavior ◽  
Textile Reinforced Concrete ◽  
Reinforced Concrete Slab ◽  
Element Analysis ◽  
Bending Load

Order to investigate the failure effect of textile reinforced concrete (TRC) plate under bending load, the corresponding finite element model is established. By comparing the numerical simulation results with the experimental results, the rationality and feasibility of the finite element model are verified, and then the crack extension of TRC and the ultimate strain of carbon textile are analyzed. The failure mode of the slab under bending load is obtained, and it is found that the carbon textile concrete slab has better reinforcement effect, which greatly improves the safety performance of concrete members.

Numerical Simulation Technology of the Steel Reinforced Concrete Special-Shaped Columns Using Ansys

2012 ◽  
Vol 466-467 ◽  
pp. 1232-1236
Author(s):  
Wei Hou ◽  
Xue Feng Zhou ◽  
Xiang Chen
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Element Model ◽  
Mechanical Behaviors ◽  
Simulation Technology ◽  
Quick Method ◽  
Element Analysis ◽  
Steel Reinforced Concrete

Nonlinear finite element analysis of twelve SRC (steel reinforced concrete) special-shaped columns using ANSYS programs was conducted and the mechanical behaviors of these columns were analyzed. A series of numerical simulation technologies such as defining the material model of the concrete /steel, establishing global finite element model with discrete reinforced bars/stirrups elements and the methods of post-processing of the results were investigated. A quick method of finite element model establishment was proposed to avoid unit not sharing nodes and grid division error during meshing, which would cause problems such as divergence of the model. The results indicate that the numerical simulation technology presented is feasible and can be applied to further research on mechanical behaviors of the SRC structures.

scholarly journals Square reinforced CFST column to RC beam joint subjected to lateral loading: An investigation using finite element analysis

2018 ◽  
Author(s):  
Dan Gan ◽  
Zheng Zhou ◽  
Xuhong Zhou ◽  
Kang Hai Tan
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Element Model ◽  
Steel Tube ◽  
Load Level ◽  
Lateral Loading ◽  
Rc Beam ◽  
Element Analysis ◽  
Joint System

Concrete-filled steel tube (CFST) columns have been applied popularly in recent years, where they were connected with reinforced concrete (RC) beams or steel beams in a building. This paper proposes a joint system which connects the square reinforced concrete-filled thin-walled steel tube (RCFTWST) column and RC beam. In the joint system, reinforced bars are located in the square CFTWST column, and stiffeners are welded at adjacent sides of the square steel tube. Besides, the panel zone is strengthened by internal diaphragms. A finite element model (FEM) based on software ABAQUS was developed to evaluate the behavior of the proposed joint system under lateral loading, and parametric analysis was carried out. Based on the analysis results obtained from FEM, some important parameters were chosen. And two specimens were tested under combined axial compression and low-cyclic lateral load to assess the seismic performance of the proposed joint system. The axial load level was chosen as the parameter. Test results showed that all tested specimens performed well up to 5% drift and can satisfy the seismic requirements of “strong-joint weak-component”. In addition, the finite element model (FEM) is verified by comparing with the experimental results. The results can be well predicted by the model.

Nonlinear Finite Element Analysis of Corroded Reinforced Concrete Lock-Walls

2011 ◽  
Vol 101-102 ◽  
pp. 329-332
Author(s):  
Fu Lai Qu ◽  
Shun Bo Zhao ◽  
Zhi Mei Zhou ◽  
Baoan Yuan
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Concrete Strength ◽  
Element Model ◽  
Steel Reinforcement ◽  
Nonlinear Finite Element ◽  
Flexural Behavior ◽  
Element Analysis ◽  
Bond Slip

Reinforcement and concrete can work together to bear load in reinforced concrete structures, one of the main reasons is the relatively prefect bond between reinforcement and concrete. When steel reinforcement corrodes, the bond strength decreases and leads to the degradation of the reinforced concrete members. This paper built a finite element model by selecting appropriate stress-strain relationship of concrete and reinforcement, bond-slip relationship between concrete and corroded steel bars. The flexural behavior of corroded reinforced concrete lock-walls was analyzed by nonlinear finite element method. The calculated results were compared with the test results to verify the reliability of the finite element model. Finally, the influence of corrosion level of steel reinforcement and concrete strength on the normal section bearing capacity of lock-walls were discussed.

Torsional Analysis of a Steel Cord-Rubber Tire Belt Structure

1996 ◽  
Vol 24 (4) ◽  
pp. 339-348 ◽  
Author(s):  
R. M. V. Pidaparti
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Composite Structures ◽  
Three Dimensional ◽  
Element Model ◽  
Torsional Stiffness ◽  
Element Analysis ◽  
Rubber Belt ◽  
Steel Cord ◽  
Torsional Analysis

Abstract A three-dimensional (3D) beam finite element model was developed to investigate the torsional stiffness of a twisted steel-reinforced cord-rubber belt structure. The present 3D beam element takes into account the coupled extension, bending, and twisting deformations characteristic of the complex behavior of cord-rubber composite structures. The extension-twisting coupling due to the twisted nature of the cords was also considered in the finite element model. The results of torsional stiffness obtained from the finite element analysis for twisted cords and the two-ply steel cord-rubber belt structure are compared to the experimental data and other alternate solutions available in the literature. The effects of cord orientation, anisotropy, and rubber core surrounding the twisted cords on the torsional stiffness properties are presented and discussed.

scholarly journals Analysis for Wrinkling Behavior of Girth-Welded Line Pipe

1996 ◽  
Author(s):  
Luiz T. Souza ◽  
David W. Murray
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Internal Pressure ◽  
Experimental Test ◽  
Element Model ◽  
Element Analysis ◽  
Line Pipe ◽  
New Era ◽  
Analytical Tools

The paper presents results for finite element analysis of full-sized girth-welded specimens of line pipe and compares these results with the behavior exhibited by test specimens subjected to constant axial force, internal pressure and monotonically increasing curvatures. Recommendations for the ‘best’ type of analytical finite element model are given. Comparisons between the behavior predicted analytically and the observed behavior of the experimental test specimens are made. The mechanism of wrinkling is explained and the evolution of the deformed configurations for different wrinkling modes is examined. It is concluded that the analytical tools now available are sufficiently reliable to predict the behavior of pipe in a manner that was not previously possible and that this should create a new era for the design and assessment of pipelines if the technology is properly exploited by industry.

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