Infrastructure Engineering - Research Publications

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    Comparative life cycle assessment of renewable energy storage systems for net-zero buildings with varying self-sufficient ratios
    Le, ST ; Nguyen, TN ; Bui, D-K ; Teodosio, B ; Ngo, TD (PERGAMON-ELSEVIER SCIENCE LTD, 2024-03-01)
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    Modelling and Multi-Objective Optimisation of Finger Joints: Improving Flexural Performance and Minimising Wood Waste
    Le, ST ; Nguyen, TN ; Bui, D-K ; Ha, QP ; Ngo, TD (MDPI, 2023-04-29)
    The wood industry faces the dual requirements of improving the quality of timber products and minimising waste during the manufacturing process. The finger joint, which is an end-to-end joining method for timber boards, is one of the most important aspects of engineering wood products. This study presents a numerical and optimisation investigation of the effects of finger-joint design parameters on the flexural behaviour of finger-jointed timber beams. A numerical model based on advanced three-dimensional finite element analysis was developed to model the behaviour of finger-jointed beams. Using the validated finite element (FE) model and automated parameterisation, a parametric study was conducted to assess the impact of each design parameter of the finger joint, including finger length, tip thickness, and the number of finger joints. The results indicate that the number of fingers and finger length significantly influence the maximum load capacity, while the tip thickness has a marginal effect on performance. This study identifies a design threshold of five fingers and a 14 mm finger length for achieving efficient, high-performance finger-joint designs. In addition, the multi-objective modified firefly algorithm (MOMFA) was proposed to maximise the finger joint resistance while simultaneously minimising the material waste. The optimisation shows that there will be a significant amount of wood waste when using traditional single-objective optimisation that only focuses on structural performance. In contrast, the proposed method achieves comparable load capacity while significantly reducing waste (up to 53.31%) during the joining process. The automated finite element modelling framework and holistic optimisation developed in this study can be used to design and optimise engineering wood products for construction applications.
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    ADVANCED ANALYSIS OF STEEL‐CONCRETE COMPOSITE BUILDINGS
    Tran, H ; Thai, HT ; Ngo, T ; Uy, B ; Li, D ; Mo, J (Wiley, 2023-02)
    Abstract This paper presents a nonlinear simulation method for composite framing systems constituted from concrete‐filled steel tubular columns (CFST) and composite beam systems. A force‐based fibre beam‐column element in OpenSees was adopted. This element was capable of accurately capturing the local buckling of steel and the confining effect of concrete using the modified stress‐strain relationships of the steel and concrete fibres. A source code for the connection element was also developed in OpenSees to capture the semi‐rigid behaviour of the beam‐to‐column connections of the composite buildings. Through the verification with numerous experiments, the model has shown its capability of accurately simulating composite frames with simplicity and less computational cost. An extensive parametric study was conducted to examine the effect of the bracing systems and the rigidity of the connections on the behaviour and instability of the whole composite buildings.
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    Development of Novel Inter‐module Connection for Composite Modular Tall Buildings
    Kandel, A ; Thai, H ; Ngo, T (Wiley, 2023-09)
    Abstract The emerging modular building construction technique is gaining attention by researchers and investors because of its benefits such as short construction time, better quality control, minimal environmental effect and more economical. Composite modules have many advantages, including size reduction and improved fire resistance, over the steel modules, which encourage the application of modular construction on tall buildings. Current state‐of‐art lacks the proper connection technique for composite modular tall buildings. This paper presents novel inter‐module connection for composite modular tall buildings. Purposed inter‐module connection is very simple in geometric design, adequately strong to bear loads for tall buildings, easy to connect and disconnect, and applicable with internal joints and composite modules. Bolts through bolt holes connect modules vertically whereas gusset plate connects horizontally. Firstly, prototype is developed, and workability is confirmed. Performance and failure mechanism of proposed connector under tensile load are evaluated considering the effect of different parameters such as thickness of base plate, size and material of bolt. Results can be used to develop the design guideline for proposed inter‐module connection.
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    Lean and Green: How the Synergy Can Promote Sustainable Construction
    Peiris, PA ; Herath, N ; NGO, T ; Duffield, CF ; Hui, KP ; Dissanayake, R ; Mendis, P ; Weerasekera, K ; De Silva, S ; Fernando, S ; Konthesingha, C ; Gajandayake, P (Springer Nature, 2023-08-01)
    Lean construction aims to improve efficiency through the reduction of wasteful activities. These waste reduction activities also indirectly improve the sustainability approach used by organizations. Our paper examines the definition of lean construction (LC), LC activities, and green construction as understood by academics through a focused literature review. It then examines these practices considering how these activities contribute towards enhancing the sustainability of the built environment and the organization. Our findings suggest that not all waste reduction activities have the same degree of effect on sustainability improvements. Some lean tools such as standardization and just-in-time (JIT) for production scheduling can have a better effect, especially, if the key performance indicators (KPI) specifically target sustainability indicators. “Lean and Green” is not a myth and is very much achievable in the construction industry with the current efforts towards industry 4.0/5.0. Combining these two concepts remains a challenge. This paper aims to learn from what we already know and suggests ways on how “Lean and Green” can be achieved in the future. The paper includes a discussion on leveraging lean and green concepts to achieve the sustainable development goals promoted by the United Nations.
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    Progressive collapse and robustness of modular high-rise buildings
    Thai, H-T ; Ho, QV ; Li, W ; Ngo, T (TAYLOR & FRANCIS LTD, 2022-01-01)
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    Experimental, numerical, and theoretical crushing behaviour of an innovative auxetic structure fabricated through 3D printing
    Bohara, RP ; Linforth, S ; Thai, H-T ; Nguyen, T ; Ghazlan, A ; Ngo, T (ELSEVIER SCI LTD, 2023-01)
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    Safety investigation of hydrogen energy storage systems using quantitative risk assessment
    Le, ST ; Nguyen, TN ; Linforth, S ; Ngo, TD (PERGAMON-ELSEVIER SCIENCE LTD, 2023-01-22)
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    Multi-objective bulk scale optimisation of an auxetic structure to enhance protection performance
    Bohara, RP ; Linforth, S ; Thai, H-T ; Nguyen, T ; Ghazlan, A ; Ngo, T (ELSEVIER SCI LTD, 2023-04-01)