Article
Chemistry, Physical
Yavuz Yardim, Salih Yilmaz, Marco Corradi, Waleed A. Thanoon
Summary: This study examines the effectiveness of using carbon-FRP anchors to improve the confinement of square reinforced concrete columns strengthened with FRP. The proposed anchors distribute stresses more uniformly, resulting in better confinement.
Article
Engineering, Civil
Ghassan Almasabha, Ahmad Tarawneh, Eman Saleh, Omar Alajarmeh
Summary: This study analyzed a database of 53 tested slender FRP-RC columns to develop a simplified and accurate model for predicting flexural stiffness. The proposed model showed strong agreement with experimental values and accounted for second-moment order effect to enhance credibility and repeatability. Compared to existing models, the proposed model demonstrated higher accuracy in predicting flexural stiffness of slender FRP-RC columns, providing engineers with a valuable tool for design.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2022)
Article
Engineering, Civil
Enrique del Rey Castillo, Rhys Rogers, Natalia Uran, Marc Stewart
Summary: The reinforced concrete bridge in Mohaka Township, New Zealand, had issues with the connection between substructure and superstructure, leading to cracking. Solutions included physically separating the beams, adding elastomeric bearings, enlarging the pier cap, and using FRP to reinforce wall piers. Current research has provided new methods for design, reducing material and labor costs.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Engineering, Civil
Shu Fang, Lijuan Li, Lianghao Lin, Hongliang Wang, Zhuangcheng Fang, Zewei Li, Zhe Xiong, Feng Liu
Summary: The hybrid utilization of seawater sea-sand concrete and fiber-reinforced polymer composites shows promising application prospects in marine infrastructure construction due to steel corrosion elimination and use of available local materials. The interlocking multi-spiral configuration may be a viable option for improving the compressive performance of SWSSC columns. Test results confirmed that corner spirals provided additional confinement and decreased spacings effectively improved the post-peak compressive behavior, enabling columns to exhibit better deformability.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Dong Xie, Zhongjun Hu, Boxin Wang, Kang Zhao, Yatao Shi
Summary: In this study, axial compressive tests were performed on BFRP-confined square reinforced concrete columns, showing that BFRP confinement leads to strength improvement and enhanced ductility. The difference in confinement level is mainly observed in the inelastic range, and increasing corner radius improves the uniformity of confinement pressure. A prediction equation is proposed to improve the accuracy of existing square section strength models.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Nicolas El-Joukhadar, Farah Dameh, Stavroula Pantazopoulou
Summary: The deterioration of seismic resistance of columns due to corrosion damage is investigated using advanced non-linear finite element simulation and analysis. The study aims to develop performance criteria for seismic evaluation and assessment. Current guidelines for structural seismic evaluation do not consider the condition of reinforcement, which would complicate the assessment. The study proposes simple modifications to existing assessment procedures, taking into account the effects of corrosion on seismic performance, through the calibration of reduction factors for reinforcement properties and column characteristics.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Kent A. Harries
Summary: This paper demonstrates a data-driven approach to determining modeling parameters for FRP-retrofitted RC columns in accordance with current standards and proposes parameters for flexure-dominated column behavior. A refined backbone curve is suggested for FRP-retrofitted columns, prescribing an incremental rotation capacity that takes into account the improved behavior of the retrofitted column. Modeling parameters for flexure-dominated columns are also proposed.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Mechanics
F. M. Ren, S. Y. Tian, W. Ma, G. M. Chen, Y. Tao, P. Xie
Summary: This study investigated the seismic performance of Fiber-reinforced polymer (FRP) confined steel-reinforced recycled aggregate concrete (FCSRAC), finding that the use of RAC can improve the deformation capacity, energy dissipation capacity, and ductility of the composite structure, making it outperform the counterpart using normal aggregate concrete (NAC) in terms of seismic performance.
COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Kuangyu Dai, Xiaohui Yu, Zhichao Jiang, Daiyu Wang, Kai Qian
Summary: A hysteresis model was developed for FRP-retrofitted corroded RC columns, considering the effects of corrosion. Experimental data of 49 FRP-retrofitted corroded columns and 19 intact columns were collected to establish a database. The hysteretic behavior was simulated using a polygonal model, and empirical equations were developed to predict the coupling effects of corrosion and FRP retrofitting.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Jie-Kai Zhou, Wen-Kai Lin, Shao-Xiong Guo, Jun-Jie Zeng, Yu-Lei Bai
Summary: A novel type of PET FRP-confined FRP spiral reinforced concrete square columns were proposed in this study, which effectively alleviated the strain-softening behavior of PET FRP-confined concrete with internal FRP spiral reinforcement, leading to excellent mechanical performance.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Ali Raza, Babar Ali, Faraz Ul Haq
Summary: The study aims to recommend a new theoretical model for estimating the compressive strength of FRCFS columns, using data records constructed from previous research works to improve accuracy. Results show that the new model has higher accuracy compared to previously recommended models, providing better predictions for the structural performance of FRP wrapping and FRP bars RC columns.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING
(2022)
Article
Construction & Building Technology
C. W. Chan, S. S. Zhang, T. Yu
Summary: This study conducted tests on circular fibre-reinforced polymer-concrete-steel hybrid multitube concrete columns, finding that they have excellent axial load and deformation capacities, suitable for engineering structures. Comparison between test results and model predictions revealed that the existing model can reasonably predict axial load-strain behavior but largely underestimates ultimate strain. Further research may help in developing a more accurate model.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Civil
Ruxing Cai, Jianwei Zhang, Yujun Liu, Xinyi Tao
Summary: This paper investigates the seismic behavior of concrete members with recycled coarse aggregates. Tests were carried out on full-scale specimens with different parameters. An iterative method was proposed to investigate the relationship between reinforcement slip and stress. The recycled coarse aggregate concrete columns with CFRP jacket and UHSSBs showed positive lateral stiffness and less residual drifts compared to traditional ductile columns. The proposed method can predict the experimental yield loading capacity and yield drift.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Hamdy Shehab, Ahmed Eisa, Ahmed Mohamed Wahba, Peter Sabol, Dusan Katunsky
Summary: The use of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) has increased in civil engineering, particularly in megastructure applications. UHPFRC provides high strength and durability, allowing for reconstruction and extension of a structure's lifespan. Adding fibers to UHPFRC enhances its ductility and fracture toughness, opening up new application areas. This study investigates the behavior of reinforced concrete columns strengthened with UHPFRC jackets, finding that vertical grooving improves load capacity compared to horizontal grooving or no grooving.
Article
Polymer Science
Jacek Korentz, Witold Czarnecki
Summary: FRP bars are used as a substitute for steel bars in concrete structures due to their advantages such as high tensile strength, high strength-to-weight ratio, electromagnetic neutrality, lightweight, and corrosion resistance. However, there is a lack of standard regulations for the design of concrete columns with FRP reinforcement, like in Eurocode 2. This paper presents a procedure for predicting the bearing capacity of concrete columns with FRP reinforcement and proposes a simple method for calculating the required reinforcement.
Article
Engineering, Civil
H. Derakhshan, Y. Nakamura, M. C. Griffith, J. M. Ingham
Summary: The suitability of 'design' height amplification factors (HAF) for the purpose of seismic assessment of existing non-structural unreinforced masonry (URM) components with known strength was evaluated through a numerical study. It was found that Australia/New Zealand code procedures include significant inelastic building behaviour that reduces HAF.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Civil
Francisco Galvez, Luigi Sorrentino, Dmytro Dizhur, Jason M. Ingham
Summary: It is established that non-reinforced masonry buildings develop destructive collapse mechanisms during intense earthquakes, characterized by large rocking displacements. The Discrete Element Method (DEM) is an ideal technique for simulating the collapse of non-reinforced masonry elements due to its ability to capture large element movements. However, the variety of damping approaches used in DEM simulations highlights the need for consistent guidance in assigning damping factors.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Materials Science, Textiles
Saeed Eyvazinejad Firouzsalari, Dmytro Dizhur, Krishnan Jayaraman, Jason Ingham
Summary: Using locally available materials and labor for water infrastructure construction can promote regional economic development and ensure water supply. The manual fabric winding technique and vacuum infusion method for manufacturing pipes using flax fiber-reinforced epoxy composite are simple and replicable.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Engineering, Civil
Francisco Galvez, Luigi Sorrentino, Dmytro Dizhur, Jason M. Ingham
Summary: When subjected to high-intensity out-of-plane seismic loading, unreinforced masonry parapets and facades exhibit rigid body rocking motion before collapse. This study used simulations, experiments, and analytical models to estimate the stiffness proportional Rayleigh damping parameter based on the coefficient of restitution. The seismic performance of parapets and facades was compared using incremental dynamic analysis, confirming the validity of the developed expressions. The study also highlighted the hazardous situation that arises when the connectivity between the uncollapsed facade and the adjacent return walls is damaged during an earthquake.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2022)
Article
Engineering, Civil
Zhiyuan Fang, Krishanu Roy, Boshan Chen, Zhengxin Xie, Jason Ingham, James B. P. Lim
Summary: This paper presents an experimental and numerical investigation on the compressive behavior of aluminium alloy back-to-back channels with web holes. The study includes sixteen tests and the development of a non-linear finite element (FE) model. The results show a reasonable match between experiment and FE results, and the current design guidelines are shown to predict the axial strength with a high degree of precision. Parametric study results are used to propose equations for predicting the reduced axial strength of back-to-back channels.
ENGINEERING STRUCTURES
(2022)
Article
Materials Science, Composites
Saeed Eyvazinejad Firouzsalari, Dmytro Dizhur, Krishnan Jayaraman, Jason Ingham
Summary: The study investigates the substitution of flax fibres for synthetic fibres in fibre-reinforced polymer composites for more sustainable industrial practices, including the manufacturing and testing of three flax FRP pipes with different wall thicknesses under various conditions. Experimental and finite element modelling results show different strain distributions in the pipes under different conditions.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Review
Engineering, Civil
Enrique del Rey Castillo, Kent A. Harries, Rhys Rogers, Ravi Kanitkar
Summary: Fiber-reinforced polymer (FRP) ties can be used to provide tensile capacity to seismic-deficient concrete diaphragms, but there are no existing research or design provisions and guidance on how to design such ties is limited.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2022)
Article
Construction & Building Technology
Sunil Nataraj, Lucas Hogan, Allan Scott, Jason Ingham
Summary: This article presents a method for evaluating the corrosion of aging reinforced concrete structures and conducts a case study on a corroded concrete building constructed in New Zealand in 1928. The study finds that long-term corrosion significantly reduces the displacement capacity of the building in the absence of remediation.
JOURNAL OF STRUCTURAL ENGINEERING
(2022)
Article
Construction & Building Technology
Jitendra Bothara, Jason Ingham, Dmytro Dizhur
Summary: Vernacular masonry building types located along the Himalayan arc have shown good seismic performance in past earthquakes. However, the seismic awareness culture has eroded in recent years due to the desire for modernity. Understanding the positive and negative attributes of earthquake-resilient vernacular masonry buildings can help find a balance between traditional and modern construction materials and practices, and improve the earthquake resilience in the Himalayas.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Zhiyuan Fang, Krishanu Roy, Jason M. Ingham, James B. P. Lim
Summary: This study presents a deep-learning model to investigate the web crippling behavior of roll-formed aluminium alloy channels with centred and offset web circular holes. The predictions of the model were compared to experimental results and current design standards, and new formulas for web crippling strength were proposed. The study found that the current design standards are over conservative.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Reza Hassanli, Osama Youssf, Alan Manalo, Mohammad Amir Najafgholipour, Mohamed Elchalakani, Enrique del Rey Castillo, Darren Lutze
Summary: This paper presents the experimental study on the structural behavior of precast concrete culverts reinforced with GFRP bars. The results show that GFRP-reinforced concrete culverts have acceptable load-carrying performance with small residual deflection and crack width, especially in aggressive environments where steel bars are vulnerable to corrosion. The study indicates that the serviceability limit state, rather than the strength, governs the design of GFRP-reinforced concrete culverts.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2022)
Article
Engineering, Civil
Nouman Khattak, Hossein Derakhshan, David P. Thambiratnam, Nimal J. Perera, Jason M. Ingham
Summary: In this study, heritage URM buildings in Brisbane City, Australia, and its surrounding suburbs were characterized using the Queensland Heritage Register and online digital resources. The combination of these sources proved to be successful in characterizing URM buildings.
AUSTRALIAN JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Engineering, Civil
Feng Wang, Yang Zou, Enrique del Rey Castillo, Youliang Ding, Zhao Xu, Hanwei Zhao, James B. P. Lim
Summary: This paper proposes a novel Building Information Model (BIM)-based 3D path planning method to improve the quality of photogrammetric bridge models by optimizing the UAV flight plan. Through testing on a real bridge, the results show that this method can generate more accurate and higher quality bridge models, and improve the efficiency of photogrammetric 3D bridge reconstruction.
STRUCTURE AND INFRASTRUCTURE ENGINEERING
(2022)
Review
Construction & Building Technology
Sergio Lautaro Castro Miranda, Enrique Del Rey Castillo, Vicente Gonzalez, Johnson Adafin
Summary: This study conducted a systematic literature review on predictive analytics implementations for early-stage cost estimation of building projects. The findings suggest that predictive analytic techniques have the potential to enhance cost estimation accuracy and can serve as a reference for high-level decision-makers in implementing cost estimation and promoting proactive budget management for project owners.
Article
Engineering, Geological
Christianos A. G. Burlotos, Kevin Q. Walsh, Tatiana Goded, Graeme H. McVerry, Nicholas J. Brooke, Jason M. Ingham
Summary: This research uses probabilistic seismic hazard models and seismological characteristics to define seismic hazard zones and provide default ground motion record suites for structural designers in the absence of site-specific studies in the South Island of New Zealand.
BULLETIN OF THE NEW ZEALAND SOCIETY FOR EARTHQUAKE ENGINEERING
(2022)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)
