scholarly journals Numerical Simulation of Steel-Reinforced Reactive Powder Concrete Beam Based on Bond-Slip

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4176
Author(s):  
Haoxu Li ◽  
Jiqiang Duan ◽  
Xiao Guo
Keyword(s):  
Numerical Simulation ◽  
Strain Curve ◽  
Constitutive Relationship ◽  
Reactive Powder Concrete ◽  
Damage Factor ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Bond Slip ◽  
Plastic Damage ◽  
Reactive Powder

In this study, based on the concrete damaged plasticity (CDP) model in the ABAQUS software, various plastic damage factor calculation methods were introduced to obtain CDP parameters suitable for reactive powder concrete (RPC) materials. Combined with the existing tests for the bending performance of steel-reinforced RPC beams, the CDP parameters of the RPC material were input into ABAQUS to establish a finite element model considering the bond and slip between the steel and RPC for numerical simulation. The load-deflection curve obtained by the simulation was compared with the measured curve in the experiment. The results indicated that on the basis of the experimentally measured RPC material eigenvalue parameters, combined with the appropriate RPC constitutive relationship and the calculation method of the plastic damage factor, the numerical simulation results considering the bond-slip were in good agreement with the experimental results with a deviation of less than 10%. Thus, it is recommended to select a gentle compressive stress-strain curve in the descending section, an approximate strengthening model of the tensile stress-strain curve, and to use the energy loss method and Sidoroff’s energy equivalence principle to calculate the RPC plastic damage parameters.

Experimental Research on the Stress - Strain Curve of Regional Confined Concrete under Single Axial Press

2014 ◽  
Vol 584-586 ◽  
pp. 1289-1292
Author(s):  
Guo Liang Zhu
Keyword(s):  
Mechanical Properties ◽  
Theoretical Analysis ◽  
Constitutive Model ◽  
Theoretical Basis ◽  
Strain Curve ◽  
Confined Concrete ◽  
Constitutive Relationship ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Relationship Of

Regional confined concrete is base on confined concrete. It is the theory and application of a new attempt and development on confined concrete. To apply it to the actual project, we need to research mechanical properties and establish constitutive relationship of regional confined concrete. According to the research, we had carried on a series of tests, founded the stress-strain constitutive model of regional confined concrete under single axial press. The accuracy of theoretical analysis were more fully verified , and a theoretical basis for the application was provided.

Numerical simulation of the stress–strain curve of duplex weathering steel

2008 ◽  
Vol 29 (2) ◽  
pp. 562-567 ◽  
Author(s):  
Bo Liao ◽  
ChunLing Zhang ◽  
Jing Wu ◽  
Dayong Cai ◽  
Chunmei Zhao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Strain Curve ◽  
Weathering Steel ◽  
Stress Strain Curve ◽  
Stress Strain

Experimental Study on Compressive Property of Basalt Fiber Reactive Powder Concrete

2020 ◽  
Vol 984 ◽  
pp. 239-244
Author(s):  
Lu Liang Wang ◽  
Hai Long Zhao ◽  
De Hong Wang ◽  
Jun Feng Bai
Keyword(s):  
Test Piece ◽  
Failure Process ◽  
Basalt Fiber ◽  
Strain Curve ◽  
Reactive Powder Concrete ◽  
Compressive Property ◽  
Fiber Volume ◽  
Stress Strain ◽  
Reactive Powder ◽  
Relationship Of

In order to study the stress-strain relationship of basalt fiber reactive powder concrete (RPC), the compressive stress-strain curve test of four groups of basalt fiber RPC was carried out. The test parameters including two kinds of basalt fiber length and three fiber volume fractions showed that the deformability of the test piece was improved and the failure process was delayed after incorporating basalt fiber. The optimum fiber fraction of the test piece with 12 mm long fiber was 0.10%. According to the experimental data, the stress-strain of the basalt fiber RPC was drawn. For the curve, the constitutive relation is fitted by the piecewise equation, and compared with the experimental curve, the fitting result is better.

Numerical Simulation of Marine Recycled Concrete Specimen Based on ABAQUS

2012 ◽  
Vol 482-484 ◽  
pp. 621-626
Author(s):  
Wen Bai Liu ◽  
Wang Nan Chen ◽  
Xia Li
Keyword(s):  
Numerical Simulation ◽  
Uniaxial Compression ◽  
Sea Water ◽  
Strain Curve ◽  
Concrete Specimen ◽  
Water Erosion ◽  
Recycled Concrete ◽  
Experimental Results ◽  
Stress Strain Curve ◽  
Stress Strain

Based on ABAQUS, this article builds up a dispersion cracking model and carries out the numerical simulation of the influence of sea water erosion depth and intension upon marine recycled concrete specimen. Compared with stress-strain curve from the experiment, it can be easily found that the experimental results match well with that of simulation through the numerical simulation of uniaxial compression on average concrete, recycled concrete corroded by seawater and the same concrete after vacuum pumping, which shows two kinds of curves stay close to each other. From the results of the simulation, strain develops from the edges to the middle of the cube until it runs through the whole section, which basically corresponds with the outcome observed in the experiment.

scholarly journals A Simplified Uniaxial Stress-strain Curve of Concrete and Its Application in Numerical Simulation

2021 ◽  
Vol 283 ◽  
pp. 01045
Author(s):  
Lou Yafei ◽  
Zou Tao ◽  
Yang Jie ◽  
Jiang Tao ◽  
Zhang Qingfang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Computational Efficiency ◽  
Concrete Beams ◽  
Strain Curve ◽  
Uniaxial Stress ◽  
Stress Strain Curve ◽  
Stress Strain ◽  
Good Convergence ◽  
High Computational Efficiency

Detennining the constitutive model is a key procedure in numerical simulation of concrete structures. The uniaxial stress-strain curve is important information to determine the concrete constitutive model. This paper provided a simplified stress-strain curve of concrete that can be used in simulation. The comparison between Chinese Code and the simplified curve shows that the simplified curve of uniaxial compression is close to the code value. Numerical simulation of concrete beams show that the simplified curve proposed has high computational efficiency and good convergence.

Experimental Investigation on Stress-Strain Curves of Reactive Powder Concrete under Uniaxial Compression

2011 ◽  
Vol 261-263 ◽  
pp. 192-196 ◽  
Author(s):  
Yan Zhong Ju ◽  
De Hong Wang ◽  
Fei Jiang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Uniaxial Compression ◽  
Steel Fiber ◽  
Strain Curve ◽  
Fiber Content ◽  
Reactive Powder Concrete ◽  
Stress Strain ◽  
Reactive Powder

Based on experiments of uniaxial compression and flexural experiments, the basic mechanical properties (compressive strength and flexural strength) of reactive powder concrete (RPC) were investigated, the effect of the steel fiber content on mechanical properties of RPC was studied in this work. The resu1ts indicate that the axial compressive strength of RPC had no obvious change with the change of steel fiber content. When the steel fiber content varied from 1.0% to 2.0%, the flexural strength of RPC had no obvious change.When the steel fiber content varied from 2.0% to 5.0%, the flexural strength of RPC increased dramaticlly with the increase of steel fibers content. According to experiment curves, an equation for the compressive stress-strain curve of RPC was deduced with different stee1 fiber content.

Fracture Energy of Reactive Powder Concrete Based on Uniaxial Tensile Test

2011 ◽  
Vol 306-307 ◽  
pp. 519-522
Author(s):  
Hai Yan Yuan ◽  
Ming Zhe An ◽  
Fang Fang Jia ◽  
Zhi Gang Yan
Keyword(s):  
Tensile Test ◽  
Fracture Energy ◽  
Testing Machine ◽  
Strain Curve ◽  
Reactive Powder Concrete ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Stress Strain Curve ◽  
Concentration Problem ◽  
Reactive Powder

Based on uniaxial tensile test, the complete uniaxal tensile stress-strain curve of Reactive Powder Concrete (the steel fiber content by volume is Vf =1%, 2%) was obtained, and the fracture energy of RPC specimens with cross-section of 100mm by 100mm was calculated. The test was finished through Universal Testing Machine without any stiffness-strengthen devices. In order to solve the stress concentration problem, a self-designed uniaxial tensile test equipment was developed, and a dumbbell-shaped specimen was used in the test. The results indicate that the fracture energy of RPC increased as well as the increasing of Vf.

scholarly journals Properties of Reactive Powder Concrete and Its Application in Highway Bridge

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Junwei Song ◽  
Shuhua Liu
Keyword(s):  
Compressive Stress ◽  
Strain Curve ◽  
Elastic Behaviour ◽  
Reactive Powder Concrete ◽  
Stress Strain ◽  
River Sand ◽  
Element Analysis ◽  
Conventional Concrete ◽  
Reactive Powder ◽  
Uniaxial Compressive Stress

A high-performance reactive powder concrete (RPC) was prepared with river sand, and the maximum particle size is 1.25 mm, under the 80°C steam curing condition. It is tested completely in terms of strength, uniaxial compressive stress-strain relation, flexural load-deflection relation, and frost resisting durability, and the results indicate that the concrete is suitable to RPC200. The uniaxial compressive stress-strain curve shows a linear-elastic behaviour up to explosive failure, which is different from that of conventional concrete. High postpeak load carrying capacity shows high toughness and reinforcing effect of the steel fibers. The RPC has not only much higher limit strain than conventional concrete, but also excellent frost resisting durability at the fifth day of age exceeding F300. Furthermore, the RPC satisfactorily meets the requirement of practical application for Xialouzi Bridge built with the RPC totally according to the calculation with finite element analysis software MIDAS/Civil. And the static loading testing result suggests that design of the bridge meets the utilization requirements.

scholarly journals Experimental and numerical evaluation of resilience and toughness in AISI 1015 steel welded plates

2019 ◽  
pp. 62-75
Author(s):  
Pavel Michel Zaldivar-Almaguer ◽  
Roberto Andrés Estrada-Cingualbres ◽  
Roberto Pérez-Rodríguez ◽  
Arturo Molina-Gutiérrez
Keyword(s):  
Numerical Simulation ◽  
Tensile Test ◽  
Numerical Evaluation ◽  
Mechanical Characterization ◽  
Welded Joint ◽  
Strain Curve ◽  
Experimental Stress ◽  
Stress Strain Curve ◽  
Stress Strain

The mechanical characterization of the engineering materials is always a topic of interest to engineers and researchers. The objective of this work is to study the butt welded joint resilience and toughness by means of the tensile test and the numerical simulation. The specimens were fabricated by welding two plates of AISI 1015 steel with an E6013 electrode. An algorithm of the numerical integration based on the trapezoid method that allowed calculating the resilience and toughness as the area under the stress - strain curve was implemented. The algorithm was validated by comparing the numerical results of the resilience with those obtained by the analytical method. The results show that the resilience and the toughness values computed with the experimental stress - strain curve, they have correspondence with the same values calculated with the numerical simulation.

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