Article
Engineering, Multidisciplinary
Eid Abdallah, Ihab El Aghoury, Sherif Mohamed Ibrahim, Amr Shaat
Summary: In this paper, the behavior and strength of beam-to-CHS column branch plate connections were numerically investigated using a finite element model. The study found that the CHS column diameter, wall thickness, branch plate length, and load eccentricity have a significant effect on the connection capacity. The results also propose an improved design guideline for CHS column branch plate connections subjected to in-plane bending.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Engineering, Civil
Hao Qi, Shaowei Hu, Peiyi Wang, Xiang Xue, Changxi Shan, Wenhao Li, Kang Wang, Jinghao Li
Summary: A novel precast tubular web reduced beam section (PTWRBS) connection was proposed and its seismic performance was studied through quasi-static tests and numerical analysis. The results showed that the PTWRBS connection exhibited higher ductility and energy dissipation capability, and the repaired connection also maintained high bearing capacity and ductility.
Article
Engineering, Civil
Di Zhao, Jigang Zhang, Feifei Liu, Zhehao Ma, Guoliang Zhao, Chi Gu, Weicheng Zhang, Hanyu Song
Summary: The dynamic response to lateral impact of steel tube confined concrete with a circular hollow section was investigated through laboratory pendulum impact tests. The results showed that increasing the outer wall thickness and adopting an appropriate hollow ratio can effectively improve the impact resistance of such columns.
THIN-WALLED STRUCTURES
(2023)
Article
Construction & Building Technology
Bing Cui, Shengchun Zhu, Guangda Zhang, Shun Tan, Canhui Zhao, Kailai Deng
Summary: A dry-connection method for prefabricated piers was proposed and its performance was validated through experiments. Design suggestions were also provided to ensure the ductility of the piers.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Review
Engineering, Civil
Mohamed Elchalakani, Thumitha Mandula Higgoda, Mehrdad Kimiaei, Bo Yang
Summary: This paper provides a comprehensive review of experimental studies on pultruded and pullwound FRP tubular members, focusing on the developments of connections related to these members in the past decade. The scope of the review is limited to member, connection, and full-scale frame behavior. Published works on failure modes, results, and conclusions are discussed and compared. The review concludes with a summary and recommendations for future research.
Article
Engineering, Civil
Chunyan Quan, Merih Kucukler
Summary: This paper investigates the structural behaviour and design of stainless steel circular hollow sections (CHS) and elliptical hollow sections (EHS) at elevated temperatures. Shell finite element models are created and validated against experimental results, generating benchmark structural performance data. Parametric studies are performed on different types of stainless steel CHS and EHS, considering various loading conditions and temperature levels. New design proposals for predicting the cross-section resistances of stainless steel CHS and EHS in fire are put forward, showing improved accuracy and safety compared to existing design provisions.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Ran Feng, Long Chen, Zhenming Chen, Boshan Chen, Krishanu Roy, James B. P. Lim
Summary: This paper presents a finite-element investigation on the bearing capacity of stainless steel hybrid tubular K-joints. The parametric study results showed that joint strengths are influenced by specific geometric parameters. The proposed design rules can accurately predict the bearing capacity of joints and are only 1% conservative to the FE strengths.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Construction & Building Technology
Zhiyun He, Tong Zhang, Tao Li
Summary: The study investigates the axial static bearing capacity of grouted square hollow section (SHS) sleeve connections through experimental tests, exploring the effect of grouted length, shear-key spacing, and grout strength. It is found that the axial static bearing capacity increases linearly with grouted length and may reach the bearing capacity of the outer tube's cross-section. The influence of grout strength on the axial bearing capacity depends on other parameters, necessitating further experimental tests for a comprehensive understanding.
ADVANCES IN STRUCTURAL ENGINEERING
(2022)
Article
Engineering, Marine
Di Zhao, Jigang Zhang, Feifei Liu, Guoliang Zhao, Chi Gu, Weicheng Zhang, Hanyu Song
Summary: This article presents a new type of steel tube confined concrete column, where the outer steel tube only confines the core concrete and does not directly bear the axial load. Axial compression tests were conducted to study the effects of the diameter-thickness ratio and the hollow ratio on the failure modes, ultimate strength, strain, and stiffness. The test results show that the outer steel tube effectively delays local buckling failure and a smaller hollow ratio and diameter-thickness ratio lead to a greater bearing capacity.
Article
Mechanics
Thumitha Mandula Higgoda, Mohamed Elchalakani, Mehrdad Kimiaei, Adam Wittek, Bo Yang
Summary: This paper presents an experimental investigation of pultruded GFRP CHS columns under concentric and eccentric compression. Different slenderness values and eccentricities were considered. Longitudinal splitting and localized delamination buckling were observed as the main failure modes. The load-carrying capacities of the concentric column under different slenderness values were compared with design rules. Under eccentric loading, the ultimate loads decrease with increasing eccentricity and slenderness, while the load-strain behavior shows non-linear characteristics due to geometric non-linearity. The FE models predicted the failure modes well, with material splitting due to hoop matrix tensile rupture.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Peijun Wang, Lele Sun, Chengxin Xia, Hangping Gu, Yuanjian Liu, Mei Liu, Fangzhou Liu
Summary: The study compared the performance of T-head Square-neck One-side Bolted Connections to Traditional High-strength Bolted Connections, finding that the one-side bolts showed differences in stiffness, bearing capacity, and ductility.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Construction & Building Technology
Suleyman Ipek, Aysegul Erdogan, Esra Mete Guneyisi
Summary: Researchers have shown great interest in elliptical concrete-filled double skin steel tubular (CFDST) columns and conducted experimental and analytical investigations to provide an opportunity for its inclusion in design codes. A finite element method was used to study the axial compressive performance of CFDST columns, revealing factors influencing their behavior, with the developed model verified against experimental results.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Lele Sun, Zeqi Liang, Min Cai, Chang Liu, Peijun Wang, Mei Liu, Fangzhou Liu
Summary: This study investigates the seismic performance of connections strengthened with H-steel stiffener, showing that H-steel stiffener can improve the ultimate rotation and energy dissipation of the connections. Design recommendations include the use of H-steel stiffener, especially extended ones, and measures to reduce slip displacement.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Zhan Guo, Jian Yang, Zhihui Li, Yu Chen
Summary: This study conducted quasi-static tests on CHST columns to investigate the impact of impact height on their ultimate capacity and deformability, and proposed a simplified hysteretic model considering the combined effects of impact height and axial load levels.
ENGINEERING STRUCTURES
(2021)
Article
Energy & Fuels
Mohamed Abdelgaied, Yehya Zakaria, A. E. Kabeel, Fadl A. Essa
Summary: By adding copper hollow fins and PCM reservoir to the tubular solar still, the production of distilled water can be increased. Experimental results demonstrate that utilizing different shapes of hollow fins and PCM can significantly enhance the performance of the tubular solar still.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Materials Science, Textiles
Abolfazl Mirdehghan, Hooshang Nosraty, Mahmood M. Shokrieh, Mehdi Akhbari
Summary: This paper investigates the effect of core pile yarn hybridization on the low-velocity impact response of 3D integrated-woven sandwich composite panels. Experimental tests were conducted to study the behavior and damage extent of fabricated samples. The results show that the contact time and deflection increase while the impact load decreases in panels with hybrid pile yarn, and the residual strength is higher compared to glass/epoxy composites.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Engineering, Multidisciplinary
A. Mardanshahi, M. M. Shokrieh, S. Kazemirad
Summary: The study developed a simulated Lamb wave propagation method for nondestructive monitoring of matrix cracking in laminated composites by accurately estimating the damping coefficient of specimens. Results showed a relationship between damping coefficient and the rate of increase in damping coefficient with crack density, highlighting the significant contribution of damping from fiber-matrix interphase and crack regions to the overall damping of composite specimens.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2022)
Review
Materials Science, Multidisciplinary
Ali Tabatabaeian, Ahmad Reza Ghasemi, Mahmood M. Shokrieh, Bahareh Marzbanrad, Mohammad Baraheni, Mohammad Fotouhi
Summary: Accurate determination and control of residual stresses are crucial for understanding the interactions between microstructure, mechanical state, failure modes, and structural integrity. Different methods of residual stress determination and classification of origins and effects are essential for effective residual stress management.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Mechanics
Amin Ekhtiyari, Mahmood M. Shokrieh
Summary: The study evaluates the influence of local separation rate on stress distribution near the crack tip and practical traction-separation laws for double-cantilever beam specimens under different loading rates. The bridging laws indicate that maximum bridging traction decreases with increasing separation rate. The proposed model, implemented in ABAQUS, demonstrates good agreement between finite element and experimental results, verifying its reliability and accuracy in accounting for rate effects in presence of large-scale fiber bridging.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Textiles
Seyed Jalaledin Najafi, Hooshang Nosraty, Mahmood Mehrdad Shokrieh, Ali Akbar Gharehaghaji, Seyed Hajir Bahrami
Summary: Adding glass nanofibers significantly increases interlaminar fracture toughness in composite materials, with only a slight impact on crack propagation load.
JOURNAL OF THE TEXTILE INSTITUTE
(2022)
Article
Materials Science, Composites
M. Bagheri Tofighi, H. Biglari, M. M. Shokrieh
Summary: This study investigated the low-velocity impact response of sandwich structures with aluminum face sheets and polypropylene core, with and without nano-reinforcement. A strain-rate dependent micromechanics model was used to simulate the dynamic behavior of the nano-reinforced polypropylene. The finite element model was validated with experimental data and used to analyze the impact performance of the sandwich structures under different material and geometrical variations. The results showed that the amount of graphene should be controlled to improve impact properties and that the impact response was more sensitive to changes in face thickness than core thickness.
JOURNAL OF COMPOSITE MATERIALS
(2022)
Article
Materials Science, Textiles
Mohammad Aghaei, Mahmood M. Shokrieh, Reza Mosalmani
Summary: The harness and weave style are important properties of woven fabrics. This study investigated the effects of different weave patterns on the mechanical properties of woven composites, as well as the impact of adding carbon nanofibers (CNFs) to the composites. The results showed that the addition of CNFs improved the tensile and shear strength of the composites, with a greater effect on shear properties. Additionally, a predictive model was developed for the strength and elastic modulus of woven composites with different harnesses and CNF weight fractions.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Mechanics
M. Bagheri Tofighi, H. Biglari, M. M. Shokrieh
Summary: The impact behavior of sandwich structures was studied using both experimental and numerical methods. The results showed that nanoreinforced structures had higher contact force and shorter contact duration, resulting in smaller damage area and dent depth. A validated finite element model was used to investigate the effects of different parameters on the impact response of sandwich structures.
MECHANICS OF COMPOSITE MATERIALS
(2022)
Article
Mechanics
A. H. Mirzaei, M. M. Shokrieh, A. Saeedi
Summary: The fatigue behavior of carbon/epoxy laminated composites with/without embedded SMA wires was investigated and a new fatigue model was proposed to predict their behavior.
COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Atefeh Fattahi, Hasan Ramezani, Mahmood M. Shokrieh, Siavash Kazemirad
Summary: The capability of finite element simulations of guided Lamb wave propagation for the characterization of the modulus of fiber-metal laminates and detection of the matrix cracking was evaluated in this study. The results showed good agreement between FE simulations and experimental tests, especially at low frequencies. The sensitivity of Lamb wave velocity to matrix cracks was observed to be higher at high frequencies.
STRUCTURAL CONTROL & HEALTH MONITORING
(2022)
Article
Engineering, Mechanical
M. Moattari, M. M. Shokrieh, H. Moshayedi
Summary: The present study focuses on investigating the influence and interaction of crack-tip geometrical constraints and welding residual stresses (WRS) on fracture behavior of IN939 superalloy. Results show that geometrical constraints have a more evident impact on WRS. Unexpected fracture behavior may occur when the WRS changes from tensile to compressive near the crack tip.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Electrical & Electronic
R. Pashaie, A. H. Mirzaei, M. Vahedi, M. M. Shokrieh
Summary: Many studies have been conducted on the simultaneous measurement of temperature and strain in different structures using fiber bragg grating (FBG) sensors for structural health monitoring. This paper achieved simultaneous measurement of strain and temperature using one uniform FBG sensor in a cantilever beam. The changes in full width at half maximum (FWHM) and Bragg wavelength shift of the FBG sensor's optical spectrum were monitored in the experimental setup.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
A. H. Mirzaei, M. M. Shokrieh
Summary: Thermography is used to evaluate the residual life of laminated composites under fatigue loading, but it may not provide detailed information on temperature rise and fatigue damage in each ply of laminated composites with stress concentration. This study modifies and improves the Self-Heating model to simulate the evolution of temperature rise and fatigue damage in laminated composites with stress concentrations, and verifies the results through extensive experiments. The present model successfully simulates the cycle-by-cycle temperature distribution and damage states in each ply of laminated composites under fatigue loading.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Composites
M. Nejati, M. M. Shokrieh, A. Ghasemi Ghalebahman
Summary: A novel method for repairing cracked aluminum sheets using polymer composite patches with embedded prestressed Nitinol shape memory alloy (Ni-Ti SMA) wires is proposed. Elastic-plastic finite element analysis was performed on the repaired aluminum plates with pure mode I and mixed-mode I/II fractures using SMA wires reinforced composite patches (SMA-CP). The performance and efficiency of the repair were evaluated by calculating the peel stress on the adhesive layer between the composite patch and the aluminum plate. The influence of prestressed Ni-Ti SMA wires on the efficiency of the composite patch was examined.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Engineering, Mechanical
M. Nejati, M. M. Shokrieh, A. Ghasemi Ghalebahman
Summary: The current research presents a semi-numerical (SN) method to obtain the critical J-integral (JC) of an Al 2024-T3 plate under plane-stress conditions. The method estimates the JC by performing a finite element simulation of a simple tensile test on a dumbbell specimen, using the true experimental stress-strain curve. Experimental programs were conducted to evaluate the results of the method and investigate the effect of notch radius on symmetrical edge U-notched specimens.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Engineering, Civil
Jian Xue, Weiwei Zhang, Jing Wu, Chao Wang, Hongwei Ma
Summary: This study integrates a plate-type local resonator with varying free boundaries within a plate to convert the initial low-order global vibration modes into localized vibration modes. A novel semi-analytical method is proposed to analyze the free vibration of the plate with thickness and displacement discontinuities. The results show that by applying free boundary conditions, the low-order localized vibration frequencies can be significantly reduced without affecting the low-order global frequencies.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Merve Tunay
Summary: In recent years, there has been an increasing number of studies on the mechanical properties of sandwich structures manufactured with the Fused Deposition Modeling (FDM) method. However, there is still a lack of experimental data on the mechanical characteristics of FDM-manufactured sandwich structures under different thermal aging durations. In this experiment, the energy absorption capabilities of sandwich structures with different core geometries were investigated under various thermal aging durations. The results showed that the core topology significantly influenced the energy absorption abilities of the sandwich structures.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Zi-qin Jiang, Zi-yao Niu, Ai-Lin Zhang, Xue-chun Liu
Summary: This paper proposes a crosssection corrugated plate steel special-shaped column (CCSC) that improves the bearing capacity and overall stability of structural columns by using smaller material input. Through theoretical analysis and numerical simulation, the overall stability of the CCSC under axial compression is analyzed. The design method and suggestions for the stability of CCSC are put forward. Compared with conventional square steel tube columns, the CCSC has obvious advantages in overall stability and steel consumption.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yong Zhang, Yangang Chen, Jixiang Li, Jiacheng Wu, Liang Qian, Yuanqiang Tan, Kunyuan Li, Guoyao Zeng
Summary: A hybrid TPMS method was proposed to develop a new TPMS structure, and the mechanical properties of different TPMS structures were studied experimentally and numerically. Results showed that the hybrid TPMS structure had higher energy absorption and lower load-carrying capacity fluctuation. Further investigations revealed that the topological shape and material distribution had significant influence on mechanical properties, and the hybrid additive TPMS structure exhibited significant crashworthiness advantage in in-plane crushing condition.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Tongfei Sun, Ye Liu, Kaoshan Dai, Alfredo Camara, Yujie Lu, Lijie Wang
Summary: This paper presents a series of experimental and numerical studies on the performance of a novel double-stage coupling damper (DSCD). The effects of damper configuration, friction-yield ratio (Rfy), and loading protocol on the hysteresis performance of the DSCD are investigated. The test results demonstrate that the arrangement of ribs in the DSCD increases its energy dissipation capacity. Numerical analysis reveals that the length of the friction mechanism and the clearance between the yield segment and the restraining system affect the energy dissipation and stability of the damper.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Jeonghwa Lee, Young Jong Kang
Summary: This study investigates the local buckling behavior and strength of I-shape structural sections by considering flange-web interactions through three-dimensional finite element analysis. The study provides a more reasonable estimation of local buckling strength by considering the ratio of flange-web slenderness and height-to-width ratio, and presents design equations for flange local and web-bend buckling coefficients.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yizhe Chen, Wenfeng Xiang, Qingsong Zhang, Hui Wang, Lin Hua
Summary: This study investigates the surface modification of a nickel plate to improve the bonding strength with carbon fiber-reinforced plastics (CFRP). The results show that different surface modification methods, including sandblasting, coupling agent treatment, and compound coupling agent treatment, significantly enhance the bonding strength of CFRP/Ni joints. The research provides insights into improving the connection between nickel and CFRP, as well as other heterogeneous materials.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Agha Intizar Mehdi, Fengping Zhang, Moon-Young Kim
Summary: A spatial stability theory of mono-symmetric thin-walled steel beams pre-stressed by spatially inclined cables is derived and its validity is demonstrated through numerical examples. The effects of initial tension, deviator numbers, inclined cable profiles, and bonded/un-bonded conditions on lateral-torsional buckling of the pre-stressed beams are investigated, with a specific emphasis on the effects of increasing initial tension.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Teng Ma, Jinxiang Wang, Liangtao Liu, Heng Li, Kui Tang, Yangchen Gu, Yifan Zhang
Summary: The structural response of water-back plate under the combined action of shock wave and bubble loads at water depths of 1-300 m was numerically investigated using an arbitrary Lagrange-Euler method. The accuracy of the numerical model was validated by comparing with experimental and theoretical results. The influences of water depth and length-to-diameter ratio of the charge on the combined damage effect were analyzed. The results show that as water depth increases, the plastic deformation energy of the water-back plate decreases, and the permanent deformation mode changes from convex to concave. When the charge has a large length-to-diameter ratio, the plastic deformation energy of the radial plate is higher than that of the axial plate, and the difference decreases with increasing water depth. Increasing the length-to-diameter ratio enhances the combined damage effect in the radial direction in deep-water environments.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiu-Yun Li, Ben Young
Summary: This paper investigates the flexural performance of CFS zed section members bent about the neutral axis parallel to the flanges through experimental and numerical analysis. The results show that the current direct strength method generally provides conservative predictions for the flexural strength of unstiffened zed section members, but slightly unconservative design for edge-stiffened zed section beams. The nominal flexural strengths of zed section members with edge stiffeners were found to be underestimated by 17% to 21% on average. Modified DSM formulae are recommended for the design of CFS zed section beams.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Weinan Gao, Bo Song, Xueyan Chen, Guochang Lin, Huifeng Tan
Summary: This paper presents a precise method for predicting deformation in large-scale inflatable structures, utilizing finite element modeling and laser scanning technique. The study shows a good agreement between the predictive model and non-contact measurement results.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Fei Gao, Zongyi Wang, Rui Zhu, Zhenming Chen, Quanxi Ye, Yaqi Duan, Yunlong Jia, Qin Zhang
Summary: This research investigates the mechanical properties of high-strength ring groove rivet assemblies and the load resistances of riveted T-stubs. Experimental tests reveal that Grade 10.9 rivets have higher yield strength and strain, and lower ultimate strain, making them suitable for high-strength ring groove rivet connections. Increasing the rivet diameter benefits the T-stubs, while increasing the flange thickness is not always advantageous. The Eurocode 3 method is not suitable for T-stubs connected through ring groove rivets, while the Demonceau method is conservative.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Shangchun Jiang, Liangfeng Sun, Haifei Zhan, Zhuoqun Zheng, Xijian Peng, Chaofeng Lue
Summary: This study investigates the bending behavior of two-dimensional nanomaterials, diamane and its analogous structure TBGIB, through atomistic simulations. It reveals that diamane experiences structural failure under bending, while TBGIB bends elastically before undergoing structural failure. The study provides valuable insights for the application of these materials in flexible electronics.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiang Zhang, Jianian Wen, Qiang Han, Hanqing Zhuge, Yulong Zhou
Summary: In this study, the mechanical properties of Q690 steel H-section columns under bi-directional cyclic loads are investigated, considering the time-varying characteristics of corrosion. A refined finite element (FE) model is built to analyze the degradation of mechanical property and failure mechanisms of steel columns with different design parameters during the whole life-cycle. The study proposes a quantitative calculation method for the ultimate resistance and damage index of steel columns, taking into account the ageing effects. The findings emphasize the importance of considering the ageing effects of steel columns in seismic design.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yuda Hu, Qi Zhou, Tao Yang
Summary: The magneto-thermo-elastic coupled free vibration of functionally graded materials cylindrical shell is investigated in this study. The vibration equation in multi-physical field is established and solved using the Hamilton principle and the multi-scale method. The numerical results show that the natural frequency is influenced by various factors such as volume fraction index, initial amplitude, temperature, and magnetic induction intensity.
THIN-WALLED STRUCTURES
(2024)