Jinhua Zhang

Jinhua Zhang
Southeast University (China) | SEU · Civil Engineering College

Professor

About

62
Publications
7,034
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809
Citations
Additional affiliations
December 2019 - March 2020
Southeast University (China)
Position
  • Teacher

Publications

Publications (62)
Article
Self-compacting rubberized concrete (SCRC) has gained extensive investigations due to its good impact resistance and environmental friendliness, while the dynamic splitting tensile properties of SCRC are seldom studied. In this study, river sand in SCRC was replaced by three rubber volume fractions (5%, 10%, 15%). The experiments indicated that the...
Article
The application of the Cohesive Zone Model (CZM) in concrete meso-mechanics solves the nonlinear problem of material crack tip well. At present, the application methods of CZM in concrete mesoscopic models include the bond mechanics characterization of the aggregate-mortar interface transition zone (ITZ) and the characterization of fracture charact...
Article
Full-text available
This paper develops a novel three-dimensional (3D) mesoscale modelling approach to study the mechanical responses of coral sands under quasi-static and dynamic compressive loading. A series of algorithms were developed to generate the 3D random particle models with controllable shape and size configurations to simulate the coral sands with random s...
Article
Particles around us are generally in the form of irregular characteristics in shape and size. Establishing rational mesoscale models that are suitable for different types of particles is of great significance to comprehensively evaluate the mechanical properties of particulate systems assembled from irregular particles. The preponderances of previo...
Article
This paper presents an experimental and numerical study on the compressive behaviors of a new carbon fiber-reinforced cement-based composite (CFRCC) that is composed of magnesium oxysulfate cement, carbon fiber and some chemical admixtures. Parametric studies on the effects of carbon fiber content and strain rate on the compressive behaviors of CFR...
Article
The constitutive relationship of basic magnesium sulfate cement-coral aggregate concrete (BMSC-CAC) under uniaxial compression was investigated using cylindrical specimens. The equal strain monotonic loading method was applied to obtain the stress-strain curves. Mechanical parameters such as elastic modulus (Ec) and Poisson's ratio(μ) were calculat...
Article
Steel fiber reinforced concrete (SFRC) has drawn extensive attention in recent years for its superior mechanical response to dynamic and impact loadings. Based on the existing test results, the high-strength steel fibers embedded in a concrete matrix usually play a strong bridging effect to enhance the bonding force between fiber and the matrix, an...
Article
This paper presents an experimental and numerical study on the dynamic splitting tensile properties of ceramic aggregate concrete (CAC) that is composed of ceramic aggregates and mortar matrix. The maximum ceramic aggregate diameter includes 0.3, 0.6, and 0.9 cm. A series of split-tension tests of CAC specimens were conducted first. Parametric stud...
Article
The use of coral aggregate concrete (CAC) as a novel construction material has attracted significant attention for the construction of reef engineering structures. To investigate the static splitting-tensile behaviors of CAC under the influence of two factors, namely specimen geometry and bearing strip size, a three-dimensional (3D) mesoscale model...
Article
Steel fiber reinforced concrete (SFRC) can exhibit superior performances of high strength and toughness due to the enhancing effect of discontinuous steel fibers randomly distributed in concrete matrix. For better understanding the size effect on the fracture properties of SFRC structural elements, we developed a three-dimensional (3D) two-phase me...
Article
Coral aggregate is a type of porous and light-weight construction material with intense prospects for the engineering applications in remote ocean islands. However, its macroscopic properties is directly determined by the mesoscopic characteristics, such as texture, porosity, etc. Thus, the mesoscopic characteristics and macroscopic properties of c...
Article
The ballistic perforation of sandwich plates comprising two identical/unidentical aluminum alloy face sheets and an aluminium foam core is investigated, to gain insights into the factors governing the penetration processes. The impact velocities of projectiles with conical, flat and hemispherical noses, range from 60 ms−1 - 220ms−1 in the experimen...
Article
The gravel granular filter has been widely used to eliminate the strong shock waves induced by deliberated and occasional explosions. The modelling of shock wave propagation and attenuation in the gravel granular filter is still not well resolved and is a topic of current research. In this study, a new three-dimensional mesoscopic model of gravel g...
Article
In the study presented in this paper, the quasi-static compressive behaviors of coral aggregate concrete (CAC) were further investigated using the mesoscale modeling method. Three-dimensional (3-D) random particle mesoscale models for CAC with different concrete strength grades were developed and validated through the comparison of numerical and te...
Article
For better understanding the compressive behavior of coral aggregate concrete (CAC) with different volume fractions and maximum aggregate sizes (MASs) for coarse aggregate, an all-sided mesoscopic investigation was performed using a novel 3D mesoscale model assuming concrete to be a three-phase composite material composed of coarse aggregate, morta...
Article
To investigate the dynamic responses and comprehending the damage mechanism of coral aggregate concrete (CAC) in compression, both the experimental and numerical investigations were implemented in the present work. Firstly, the dynamic mechanical properties of CAC at different strain rates were tested through the Split-Hopkinson pressure bar (SHPB)...
Article
Further understanding of the mechanical responses and the failure mechanism of concrete under different loadings, the mesoscale modelling approach considering the heterogeneity of concrete has drawn extensive attention in investigating its mechanical behaviors. State-of-the-art mesoscale modelling approaches and material models for concrete are pre...
Article
Dynamic tensile properties of concrete play a very important role in the blast-resistant performance of concrete structure. Systematic tests on the tensile properties of normal concrete at high strain rates in the direct-tension way by using an improved Split Hopkinson Tension Bar (SHTB) technique were carried out. Quasi–static direct-tension test...
Article
The pre-existing studies of the dynamic tensile properties of coral aggregate concrete (CAC) are mainly performed through the splitting-tensile tests or simulations, which have certain discrepancies with the direct tensile properties. This paper employs a 3D mesoscale modelling approach considering the random characteristics (shape and distribution...
Article
The paper presents a mesoscopic investigation into the effects of specimen size and strain rate upon the strength and failure modes of coral aggregate concrete (CAC) in splitting tension. The 3D mesoscale modelling approach that assumes CAC as a tri-phase composite (i.e., aggregate, mortar and ITZ) was established to simulate its tensile behaviours...
Article
Self-compacting rubberized concrete (SCRC), as the primary material of road construction, is produced by adding rubber particles instead of sand to self-compacting concrete (SCC). Four kinds of concrete with different rubber contents (0%, 5%, 10%, and 15%) are tested in this study. The materials testing systems (MTS) and split Hopkinson pressure ba...
Article
In this study, the uniaxial compressive behaviors of ecological concrete were investigated using experimental and numerical methods. The uniaxial compressive test was performed on the cubic specimens with a side length of 150 mm. The three-dimensional (3D) mesoscopic model with the consideration of random shapes and sizes of aggregates was develope...
Article
Depleted uranium (DU) has surprising physical properties such as a high density, high hardness, and high toughness. A numerical method was developed in AUTODYN to study the penetration performance of a shaped charge with a liner made of DU with 0.75% titanium. By comparing different parameters and results from different models, the strength model s...
Article
To explore the fatigue fracture behavior of self-compacting concrete (SCC), constant amplitude loading tests and incremental amplitude loading tests were carried out. The experimental results of SCC were obtained and analyzed, including P-CMOD curve, fatigue life, effective crack length, fatigue crack growth (FCG) rate, stress intensity factor (SIF...
Article
The dynamic tensile properties of coral aggregate seawater concrete (CASC) play a substantial role in reef engineering and marine military defense engineering applications. CASC and sisal fiber coral aggregate seawater concrete (SFCASC) with sisal fiber content of 3 kg/m³ were prepared in this study. The dynamic tensile test under high strain rate...
Article
Steel corrosion in coral aggregate concrete (CAC) mixed with different inhibitors was investigated using electrochemical impedance spectroscopy (EIS) technique in this paper. Considering the porosity characteristic of coral aggregate, a novel method of premixing inhibitor into coral aggregate was proposed and compared with the conventional mixing m...
Article
The dynamic compressive behavior of concrete is closely associated with the specimen size effect and the coupling effect of strain rate and specimen size on the compressive properties is something there worthy studying for the development and application of coral aggregate concrete (CAC). A novel 3D mesoscale modelling approach taking the random ch...
Article
This paper proposes a 3D model for analyzing the rockfall trajectory within the framework of contact mechanics and rigid body dynamics, focusing on arbitrary shapes of the falling rock and terrain. Firstly, the sphericity and the concavity and convexity are defined to quantitatively describe the overall shape and local appearance of often-observed...
Article
To explore the specimen aspect-ratio effect on the compressive behavior of coral aggregate concrete (CAC), a three-dimensional (3D) random mesoscale modelling approach considering random shapes and distributions of aggregates is developed in the present study. Compared with available test results, the reliability of the proposed numerical approach...
Article
This paper focuses on the mechanical response of double-layer aluminum foam under static and impact loading. In the first part, experimental investigations are conducted to research the static and dynamic response of aluminum foam. The mechanical response of single- and double-layer specimens is discussed. In the second part, a mesoscopic model is...
Article
An investigation that combines both experimental tests and mesoscopic modelling is conducted to characterize the dynamic splitting-tensile behavior of coral aggregate concrete (CAC). Static and dynamic splitting-tensile strength and failure patterns of CAC with different uniaxial compressive strength (30–70 MPa) are tested by means of MTS machine a...
Article
Based on the mix proportion design principle of high performance lightweight aggregate concrete, rich slurry concrete theory and fiber reinforced toughening technology, high strength Coral Aggregate Seawater Concrete (CASC) and sisal fiber reinforced CASC (SFCASC) with 28d cube compressive strength of 74.6 MPa and 77.3 MPa respectively were prepare...
Article
Dynamic tensile failure (e.g. spall) is frequently observed when concrete structures are subjected to blast and impact loadings, which is accompanied by the increase of tensile strength with increase of loading rate. Accurate prediction of dynamic tensile failure in concrete material is a challenging problem, in which the strain-rate effect should...
Article
Rubberized concrete is a new type of building material intended to ultise waste rubber with a potential for significant economic and environmental benefits. However, its strength is lower than the strength of ordinary concrete due to the introduction of rubber material, which might affect its application in practical engineering. To improve the mec...
Article
The shape characteristics of coarse aggregate can influence the macroscopic and mesoscopic mechanical response of concrete significantly. This paper aims to develop a relatively ‘pure’ concrete by replacing the irregular coarse aggregate using spherical ceramic balls. This is the purpose of using ceramic spherical particles as coarse aggregate. The...
Article
Full-text available
This article is aimed to reveal the dynamic response of layered graded metallic foam under impact loading using a three-dimensional mesoscopic model. First, a mesoscopic model for closed-cell metallic foam is proposed based on the X-ray computed tomography images. Second, a numerical analysis approach is presented and validated with test data. Thir...
Article
The watershed algorithm has been used widely in the x-ray computed tomography (XCT) image segmentation. It provides a transformation defined on a grayscale image and finds the lines that separate adjacent images. However, distortion occurs in developing a mesoscopic model of metallic foam based on XCT image data. The cells are oversegmented at some...
Article
A spherical falling rock is usually assumed in the design of reinforced concrete (RC) sheds. Little attentions have been paid to the effects of falling rock's shape on impact force and structural response theoretically, numerically and experimentally. This paper aims to reveal the influence of falling rock's shape on the impact effect of RC slabs....
Article
In order to obtain a more realistic mesoscopic analysis model of closed-cell aluminum foam, a new methodology for the finite element modeling based on computed tomography (CT) images is presented. First, the optimal threshold between base material and air was developed using Otsu algorithm by analyzing the images obtained from the CT scanning of cl...
Article
In order to establish the three-dimensional(3D) mechanical model of rock-filled concrete(RFC), firstly, 3D random polyhedron was used to simulate the rock rubble, and the rock rubble's spatial random distribution algorithm and compaction algorithm were put forward; secondly, the self-compacting concrete(SCC) filling algorithm was proposed to genera...
Article
The anti-penetration capability of concrete material is mainly dependent on its compressive strength and diameter and strength (hardness) of coarse aggregate. To develop a new type of concrete material being able to resist more intensive projectile impact loading, corundum pebbles with ultra-high strength and hardness were added, and corundum-aggre...
Article
This paper presents a methodology for the development of a three-dimensional mesoscopic model of a closed-cell metallic foam based on the characteristics of mesoscopic structures and CT scan images. Firstly, the distribution of pores of closed-cell metallic foam and their shape and size is analyzed. An ellipsoid with random shape and size is employ...
Article
This paper investigates the mechanical behavior and mesoscopic deformation of closed-cell aluminium foam under impact loading. Two groups of closed-cell aluminium foam specimens are prepared for static and dynamic tests respectively. The configurations of the specimen (such as porosity and base material) are considered. The mechanical response and...
Article
This paper develops a three-dimensional (3D) microscopic model to investigate the mechanical response of cement mortar with random defects at high strain rates. Ellipsoids with randomness in size, shape, and spatial distribution are used to simulate the defects in mortar matrix. First, we propose the steps to generate the ellipsoid. Second, a "take...
Article
This paper presents a three-dimensional (3D) mesoscopic model to investigate the responses of closed-cell metallic foams subjected to static and dynamic loadings, especially focusing on the 3D mesoscopic model and the mechanical response. In the first part of this paper, we propose the algorithms to generate the 3D convex polyhedrons modeling the p...
Article
In order to investigate the performances of corundum-rubble overlays subjected to small-diameter bomb penetration, a three-dimensional finite element model is developed. The model is used to study the projectile penetration into the corundum-rubble overlay by taking into account the randomness of corundum-rubble in size, shape and spatial distribut...
Article
This paper presents a three-dimensional (3D) mesoscopic model of closed-cell aluminum foams. This model is different from the model developed using Voronoi technique. Randomness of pores in shape and distribution is taken into account. The cell-wall thickness varies spatially which is consistent with test observations. Energy analysis approach is p...
Article
The ultra-high performance steel fiber reinforced concrete (UHP-SFRC) with the corundum coarse aggregate (UHP-CASFRC) was prepared under common curing temperature and pressure procedures. The static tests on UHP-CASFRC were conducted, including the uniaxial compression, direct tensile and four points bending tests. Totally 16 shots of reduce-scaled...
Article
Full-text available
This paper is composed of two parts: the generation of the sand particulate system and insights into the grain-level response under static and dynamic loadings. First, the algorithms for the generation of sand particles are presented, considering the randomness in their shape and distribution. Improvements to the robustness of the algorithms are ob...
Article
Full-text available
The split Hopkinson pressure bar test is the major method in studying the dynamic properties of concrete-like materials. Firstly, we briefly reviewed the progresses of some issues of the SHPB test of concrete-like materials, i.e. the end friction effect, the aggregate effect, the temperature effect and the inertia effect. Secondly, some mechanism a...
Article
This paper presents a new three-dimensional numerical model to study the dynamic response and failure mode of steel fiber reinforced concrete (SFRC) material under impact and blast loading. In the 3D numerical model, SFRC is assumed to be composed of two components, that is, the homogeneous concrete matrix with lower strength and the steel fibers w...
Article
Based on the meso-structure of concrete, the mixed congruential algorithm to generate a random number was applied to simulate the randomness of aggregate in shape and spatial distributions. According to the law of composition and distribution of different gradation aggregates with different sizes, a highly efficient algorithm of three-dimensional a...
Article
The application of prestressed concrete structure in the blast-resistant design has been limited due to its low ductility for a long time. The blast response characteristics of prestressed concrete structures are known little. It is highly desirable that the prestressed concrete structure is used in protective engineering with a large span owing to...
Article
According to the meso-structure and mechanical properties of fully-graded concrete, the 3D mesoscale model of convex polyhedron was generated to simulate the randomness of the aggregate in shape and spatial distribution. The static mechanical property of concrete under uniaxial, biaxial and triaxial loading conditions was simulated by the establish...

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