Forthcoming and Online First Articles

International Journal of Sustainable Materials and Structural Systems

International Journal of Sustainable Materials and Structural Systems (IJSMSS)

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International Journal of Sustainable Materials and Structural Systems (5 papers in press)

Regular Issues

  • Steel I-beam simulation for different stiffener patterns   Order a copy of this article
    by Mohaimin- Ul-Islam, Rafiul Islam, Riyadul Islam, H.M.A. Mahzuz, Md. Assaduzzaman 
    Abstract: This paper presents the effectiveness of different stiffener patterns used in steel I-beams in deformation resistance. A total of seven patterns have been studied, the patterns are- vertical, both horizontal and vertical, N-type, M-type, X-type, double Y-type and, Y-type. The result was compared with respect to the conventional one (i.e., no stiffener). All the beams were modelled using SOLIDWORKS (2019-SP04) and analysed by ANSYS (19.2). The dimensions of the I-beam as well as the thickness of the plate were kept constant throughout the study. Among them X-type stiffener has shown least deformation. While the Y-type stiffener despite not showing the least deformation is rather more efficient as the amount of steel plates used less than the X-stiffener and is thus proposed as the most economical and efficient.
    Keywords: ANSYS; deflection; efficient; load; SOLIDWORKS; stiffener.
    DOI: 10.1504/IJSMSS.2022.10044044
     
  • Modified punching shear equation of RC flat plate structure considering material and geometric parameters   Order a copy of this article
    by Mohammad Rafiqul Islam, Tahsin Reza Hossain 
    Abstract: In determining the punching shear capacity of flat plate structure, ACI 318/BNBC does not consider the effect of longitudinal reinforcement, the yield stress of steel, slab thickness, and column dimensions and uses a conservative equation. The present paper carried out a parametric study of material and geometric parameters to identify the effects of different parameters on punching shear strength of flat plates and propose a modified punching shear equation. For this, to investigate the influence of several materials and geometric properties, a numerical model of the slab-column joint of RC flat plate has been developed using 'ABAQUS' software. ACI 318/BNBC code provision is more conservative in the case of the punching shear design of flat plates. It underestimates the influence of maximum material and geometric parameters to predict the actual punching capacity. Hence, a modification to the code equation has been discussed and verified.
    Keywords: flat plate structure; slab-column joint; punching shear failure; material parameter; geometric parameter; ABAQUS software.
    DOI: 10.1504/IJSMSS.2022.10046895
     
  • Optimisation of permanent magnet array for magnetic levitation systems   Order a copy of this article
    by Matthew Frost, Ryan McMullen, Ashraf Elbarbary 
    Abstract: This paper presents the results of an experiment designed to measure the maximum static force of attraction between an iron mass and configurations of 12.7 mm cube neodymium permanent magnets. A three- and five-magnet segment of the Halbach array was studied in which the inclination angles of the adjacent magnets were varied from 0 to 90 in increments of 15 for gap distances of 5.382 mm to 30.891 mm. Results show that between a 5.585 mm and 7.465 mm gap height, the force from a five-magnet configuration with inclination angles of 15 was measured to be, on average, 2.35% larger than a configuration with 0 angles. Between 7.465 mm and 30.891 mm, the force from a configuration with inclination angles of 0 was measured to be, on average, 10.0% larger than a configuration with 15 angles.
    Keywords: magnetic levitation; Halbach array; maglev; Hyperloop; magnetic field strength; static magnetic force.
    DOI: 10.1504/IJSMSS.2022.10046896
     
  • Monitoring of thermal resistance of concrete slab models   Order a copy of this article
    by Ahmed Abdel-Mohti, Shreewan Rupakheti, Juan Castano 
    Abstract: It is important to obtain information regarding the ability of concrete structures to perform its intended function considering the inevitable aging and degradation resulting from operational environments. This study aims to serve as a benchmark for a series of research projects to thoroughly investigate the effect of temperature on the performance of concrete. The study compares the physical and mechanical properties between identical concrete samples subjected to various loads and placed in different environmental conditions at service. In this study, several concrete samples were prepared and tested within a laboratory-controlled environment and in real conditions where they were subjected to seasonal environmental conditions. The samples, placed outside of the laboratory in real conditions, were subjected to both Hurricane Laura and Delta that hit South West Louisiana in 2020. From the results of this experiment, it was possible to quantify the level of deteriorations of different tested samples.
    Keywords: concrete; structural performance; temperature; flexure; durability.
    DOI: 10.1504/IJSMSS.2022.10047565
     

Special Issue on: Application of Robotics and Artificial Intelligence in Construction of Buildings and Infrastructure - A Volume Dedicated to Professor George Bekey

  • Development of an automated hammer testing system for concrete structures   Order a copy of this article
    by Xi Huang, Huang Huang, Zhishen Wu 
    Abstract: To assess the concrete structures, regular measurements are taken and results recorded by manual hammering tests. However, manual testing is a tedious process and prone to subjective errors. This study therefore proposes a mobile, automated hammering inspection system for concrete structures. It can provide objective and realistic data quickly. The system consists of a moving hammer module and a damage detection module. Firstly, the hammering module uses a coil to ensure that each hammering produces the same force to ensure its stability and that the final result is realistic and reliable. The hammering module is then mounted on the robot arm and the hammering path is automatically planned with the assistance of the robot. In addition, a kinematic solution is applied to obtain more valid and objective acoustic data on the hammering. Finally, the system was validated by laboratory and field tests.
    Keywords: hammering test; non-destructive testing; robotic arm; automated test.
    DOI: 10.1504/IJSMSS.2023.10053447