scholarly journals Load Capacity and Displacement of Recycled Concrete and Self-Insulation Block Masonry Wall

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 863 ◽  
Author(s):  
Huizhi Zhang ◽  
Jifeng Liu ◽  
Yang Yue ◽  
Xiuqin Cui ◽  
Yuezong Lian
Keyword(s):  
Numerical Simulation ◽  
Compressive Strength ◽  
Constitutive Model ◽  
Simulation Analysis ◽  
Load Capacity ◽  
Engineering Application ◽  
Experimental Tests ◽  
Recycled Concrete ◽  
Strength Increase ◽  
Selection Of

In order to discuss the load capacity and displacement of masonry constructed with recycled concrete and self-insulation blocks, one type of 10.6 MPa compressive strength block and three kinds of mortar with M15, M10, and M5 compressive strengths are selected. The constitutive model and corresponding parameters selection of different materials in the ABAQUS numerical simulation are analyzed, and the numerical simulation analysis and experimental tests of the load capacity and displacement of masonry constructed with mortars of different strengths are carried out. The results show that masonry compression failure is controlled by the mortar or block that has the lower compressive strength. The displacement of masonry increases with the mortar compressive strength increase, and the higher mortar compressive strength is beneficial for improving the load capacity and displacement of masonry. Reasonable selection of the constitutive model and parameters will help to obtain reasonable results for the ABAQUS numerical simulation. Construction quality and loading method will affect the load capacity and displacement of the masonry. The above conclusion can provide reference for the engineering application of recycled concrete and self-insulation blocks.

scholarly journals Calibration of Finn Model and UBCSAND Model for Simplified Liquefaction Analysis Procedures

2021 ◽  
Vol 11 (11) ◽  
pp. 5283
Author(s):  
Jui-Ching Chou ◽  
Hsueh-Tusng Yang ◽  
Der-Guey Lin
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Structural Damage ◽  
Simulation Analysis ◽  
Constitutive Models ◽  
Soil Liquefaction ◽  
Analysis Procedure ◽  
Liquefaction Resistance ◽  
Simplified Procedure ◽  
Liquefaction Analysis

Soil-liquefaction-related hazards can damage structures or lead to an extensive loss of life and property. Therefore, the stability and safety of structures against soil liquefaction are essential for evaluation in earthquake design. In practice, the simplified liquefaction analysis procedure associated with numerical simulation analysis is the most used approach for evaluating the behavior of structures or the effectiveness of mitigation plans. First, the occurrence of soil liquefaction is evaluated using the simplified procedure. If soil liquefaction occurs, the resulting structural damage or the following mitigation plan is evaluated using the numerical simulation analysis. Rational and comparable evaluation results between the simplified liquefaction analysis procedure and the numerical simulation analysis are achieved by ensuring that the liquefaction constitutive model used in the numerical simulation has a consistent liquefaction resistance with the simplified liquefaction analysis procedure. In this study, two frequently used liquefaction constitutive models (Finn model and UBCSAND model) were calibrated by fitting the liquefaction triggering curves of most used simplified liquefaction analysis procedures (NCEER, HBF, JRA96, and T-Y procedures) in Taiwan via FLAC program. In addition, the responses of two calibrated models were compared and discussed to provide guidelines for selecting an appropriate liquefaction constitutive model in future projects.

scholarly journals Procedure for the Selection of Rubber Compound in Rubber-Metal Springs for Vibration Isolation

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1737
Author(s):  
Milan Banić ◽  
Dušan Stamenković ◽  
Aleksandar Miltenović ◽  
Dragan Jovanović ◽  
Milan Tica
Keyword(s):  
Numerical Simulation ◽  
Constitutive Model ◽  
Vibration Isolation ◽  
Correct Selection ◽  
Virtual Experiment ◽  
Rubber Compound ◽  
Key Factor ◽  
Railway Engineering ◽  
Selection Of

The selection of a rubber compound has a determining influence on the final characteristics of rubber-metal springs. Therefore, the correct selection of a rubber compound is a key factor for development of rubber-metal vibration isolation springs with required characteristics. The procedure for the selection of the rubber compound for vibration isolation of rubber-metal springs has been proposed, so that the rubber-metal elements have the necessary characteristics, especially in terms of deflection. The procedure is based on numerical simulation of spring deflection with Bergström-Boyce constitutive model in virtual experiment, with a goal to determine which parameters of the constitutive model will lead to spring required deflection. The procedure was verified by case study defined to select rubber compound for a rubber–metal spring used in railway engineering.

Numerical Simulation Analysis of the Effect of Sheet Property on Forming Safety Margin of Drawing Panel

2012 ◽  
Vol 503-504 ◽  
pp. 863-866
Author(s):  
Jing Jing Guan ◽  
Zhong Jin Wang ◽  
Yi He Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Deep Drawing ◽  
Simulation Analysis ◽  
Safety Margin ◽  
Quantitative Relation ◽  
Deformation Feature ◽  
The Relationship ◽  
Deformation Procedure ◽  
Selection Of

In order to research the relationship between drawing panels and sheet properties, some parts with typical deformation feature （shallow drawing, deep drawing and bulging-deep drawing）are chosen as analysis objects. Then, finite element method is used to establish the model that can describe the quantitative relation between blank performances and forming safety margin of drawing panel. With the model, the law that illustrates the influence of sheet properties on the deformation procedure of drawing panels is get, and the criterion for selection of panel material is provided for production.

scholarly journals Research on numerical simulation and intelligent computing of vehicle wading driving by smooth particle hydrodynamics method

2021 ◽  
Vol 2083 (4) ◽  
pp. 042091
Author(s):  
Wei Zhang ◽  
Peigang Jiao ◽  
Qinzhong Hou
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Test Site ◽  
Theoretical Research ◽  
Smooth Particle Hydrodynamics ◽  
Sph Method ◽  
Intelligent Computing ◽  
Simulation Process ◽  
Particle Hydrodynamics

Abstract The method based on Smooth Particle Hydrodynamics (SPH) is a meshless method which is widely used at present. Its advantage is that it can effectively improve the mesh distortion when finite element is used to deal with large deformation, and its particle characteristics are suitable to deal with the simulation problem of fluid. Based on the actual vehicle wading test site and the actual parameters of the vehicle, combined with the actual situation and theoretical basis, the SPH method is used for numerical simulation analysis of the vehicle wading problem. By comparing the simulation process with the actual water changes during wading, the feasibility of using SPH method in vehicle wading application is proved. In the simulation process of vehicle wading driving, under the condition of constant water level, by setting different wading speeds of vehicle, the flow law and change mechanism of water free surface are analyzed, which are of great significance in theoretical research and engineering application research.

Numerical Simulation Analysis of Pullout Test of Planting Steel - A New Reinforcement Technique

2010 ◽  
Vol 163-167 ◽  
pp. 3739-3744
Author(s):  
Jian Chun Mu ◽  
Hui Feng Xi ◽  
Yong He Wu ◽  
Sheng Qiang Li ◽  
Guo Hui Yang
Keyword(s):  
Numerical Simulation ◽  
Bearing Capacity ◽  
Theoretical Basis ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Pullout Test ◽  
Ultimate Bearing Capacity ◽  
Stress Curve

The paper proposed a new reinforcement technique-planting steel technique. By numerical simulation analysis of planting steel, the load – slip curve, the load – stress curve and others were obtained. Meanwhile, ultimate bearing capacity of angle was calculated, and the ultimate bearing capacities with the same model at different anchorage depths were compared. With the anchorage depth increased, the ultimate bearing capacity increased too. But while the anchorage depth increased to a certain value, the ultimate bearing capacity no longer increased. All these provided a theoretical basis for the engineering application of planting steel technique.

scholarly journals Utilizing Recycled Concrete and Stone Aggregate as Replace-ment for Natural and Crushed Virgin Aggregate

2018 ◽  
Vol 7 (4.37) ◽  
pp. 90
Author(s):  
Zaid Al-Azzawi ◽  
. .
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Recycled Concrete ◽  
Modulus Of Rupture ◽  
Concrete Aggregate ◽  
Strength Increase ◽  
Lower Grade ◽  
Replacement Ratio ◽  
Alternative Choice

The mechanical properties of recycled concrete aggregate form Al-Anbar province in Iraq is presented in this paper. Recycled concrete and stone aggregates were utilized as replacements for both natural and crushed virgin aggregate. Four series of tests were conducted to study various replacement ratios (0.25, 0.50, 0.75 and 1.0) effect on compressive strength, splitting tensile strength and modulus of rupture. Density of concrete in addition to its water absorption were also investigated. Results of this work show that replacing natural and crushed virgin aggregate with waste concrete aggregate extracted from left-over concrete cubes and concrete barriers did not affect its mechanical properties significantly. In fact, in this study the general trend is that the compressive strength increases with increasing the replacement ratio from 0.0 to 1.0. However, the tensile strength showed different behaviour as there was a limit for the strength increase with replacement ratio where beyond it the strength started decreasing again. This limit varied between 0.50 and 0.75 depending on the type of aggregate used and the type of the test. The age of test did not affect the behaviour of the trialled mixes significantly. In addition to that, recycled stone aggregate proved to be an alternative choice only for lower grade concrete because it reduced both compressive and tensile strength in comparison to the reference mix. 

scholarly journals Compressive Behavior of Recycled Mortar After Exposure to High Temperatures

2016 ◽  
Vol 10 (1) ◽  
pp. 807-812 ◽  
Author(s):  
Jiong-Feng Liang ◽  
Ze-Ping Yang ◽  
Ping-Hua Yi ◽  
Jian-Bao Wang
Keyword(s):  
Compressive Strength ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Color Change ◽  
Engineering Application ◽  
Recycled Concrete ◽  
Concrete Aggregate ◽  
Compressive Behavior ◽  
Natural Sand ◽  
Obvious Relation

The possibility of using fine recycled concrete aggregate as a substitute for natural sand are relatively limited. In order to promote it for engineering application, this paper reports the effect of elevated temperatures from room temperature to 600oC on the compressive behavior of mortars containing recycled fine concrete aggregate was investigated. It is found that no obvious relation between the color change and the recycled mortars replacement percentage.And the mass loss of recycled mortars is larger than that of normal mortars.The compressive strength of recycled mortars declines significantly as the temperature rises. The elastic modulus of recycled mortars decreased with the increase in temperature, and the decrease is much quicker than the decrease in compressive strength.

Study on Suspended Mass Pendulums for Vibration Control of Transmission Tower under Seismic Excitation

2012 ◽  
Vol 446-449 ◽  
pp. 3323-3327
Author(s):  
Li Tian ◽  
Wen Feng Li ◽  
Zi Long Wang
Keyword(s):  
Numerical Simulation ◽  
Vibration Control ◽  
Passive Control ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Time History ◽  
Element Model ◽  
Seismic Excitation ◽  
Transmission Tower ◽  
Tower Vibration

In order to research the effectiveness of passive control on transmission tower vibration control under seismic excitation, suspended mass pendulum (SMP) is carried out in this study. Based on the mechanism and equation of earthquake vibration control, earthquake induced vibration control for transmission tower model with suspended mass pendulums was performed by using numerical simulation. Using SAP2000 software, three-dimensional finite element model of a transmission tower is created, and seismic records are selected by different site soils. Typical time history curves and the maximum responses of displacement, axis force, shear force and moment of the transmission tower without and with suspended mass pendulums are obtained by numerical simulation analysis. The results show that the SMP is very effective in mitigating tower vibration, and the method can be a reference for practice engineering application.

Numerical Simulation of New Class-Honeycomb Sandwich Structure's Core

2013 ◽  
Vol 834-836 ◽  
pp. 1601-1606
Author(s):  
Xiang Li ◽  
Li Cheng Yu ◽  
You Hui Zhou ◽  
Yang Li ◽  
Xun Zhang
Keyword(s):  
Numerical Simulation ◽  
Sandwich Structure ◽  
Simulation Analysis ◽  
Engineering Application ◽  
Efficient Energy ◽  
New Class ◽  
Honeycomb Sandwich ◽  
Theoretical Significance ◽  
First Time ◽  
Honeycomb Sandwich Structure

As the sandwich structure materials extensively used in the engineering field, the existing sandwich structure materials can not meet the requirements of engineering design gradually. New sandwich structural materials with efficient, energy-saving and easy processing need to be developed urgently. Relying on the mature research results now on honeycomb sandwich structure, the class-honeycomb sandwich structure is put forward for the first time, meanwhile, innovate configuration in the structure. Based on this, the paper analyzes the mechanics properties of the structure and the results showed that the new class-honeycomb sandwich structures mechanics properties have improved greatly compared with the original hexagonal honeycomb sandwich structure. And also simulation analysis was carried out on the cores structure. The validity of the equivalent elastic constant is confirmed through the theoretical analysis and simulation analysis. For this reason, it has great theoretical significance and engineering application value.

Expermental Study on the Mixture Ratio and the Compressive Strength of Concrete with Recycle Crushed Brick Coarse Aggregate

2014 ◽  
Vol 584-586 ◽  
pp. 1362-1365 ◽  
Author(s):  
Qin Liu ◽  
Xiao Na Zhang
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Engineering Application ◽  
Recycled Concrete ◽  
Concrete Compressive Strength ◽  
Mixture Ratio ◽  
Coarse Aggregates ◽  
Compressive Performance ◽  
Compressive Strength Of Concrete ◽  
High Absorption

Considering the high absorption of water is a distinctive feature of recycled crushed bricks coarse aggregate, the mixture ratio text of recycled concrete using crushed bricks as coarse aggregate is carried out, and the compressive performance is studied.The resert indicate , the strength grade of recycled concrete which using bricks as coarse aggregate can reach C20 and C25, characterisitic value of cubic concrete compressive strength at the age of 28 days are 21.2MPa and 27.55MPa;Based on regression analysis of test data , the formulas which estimated the strength of recycled coarse aggregates concrete are given out. Calculated values are in agreement with the measurement values, which can provide a reference for engineering application.

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