Article
Construction & Building Technology
Gabor Hajdu, Hartmut Pasternak, Ferenc Papp
Summary: This paper evaluates the lateral-torsional buckling resistance of I-beams with sinusoidal corrugated web using a thin-walled beam-column finite element method. The elastic critical moment of the corrugated web beams is determined by modifying the warping constant of the cross-section. The developed finite element method is accurate for linear buckling analysis and allows for determining the plastic resistance of the corrugated web beams. The study proposes a more precise and safe imperfection factor for predicting the inelastic lateral-torsional buckling resistance of sinusoidally corrugated beams.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Mechanics
Tolga Yilmaz
Summary: This study aims to provide a simplified equation for calculating the elastic lateral-torsional buckling (LTB) of cantilever beams with European standard I-sections. An analytical model considering first-order bending distribution, load height level, and section monosymmetry property was introduced. Then, a simplified formula was derived utilizing this analytical model and two dimensionless coefficients. The proposed analytical solutions were verified with finite element analysis and the effects of slenderness and loading positions on the LTB behavior of cantilever beams with European standard I-sections were investigated. It was found that the analytical solutions were compatible with the finite element analysis, and the proposed equation can be safely used for calculating the elastic LTB of cantilever beams.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
C. Shawn Sun, Oluwatobi F. Babarinde, Dinesha Kuruppuarachchi, Daniel G. Linzell, Jay A. Puckett, Emmanuel Akintunde
Summary: The bottom flanges of Louisiana's bridges' continuous span stringers may experience compression-induced lateral torsional buckling. The AASHTOWare Bridge RatingTM analysis software used to rate these stringers may underestimate their flexural strength due to inadequate consideration of bracing effects provided by a noncomposite deck. Experimental and analytical studies have shown that considering the bracing effects of a concrete deck can possibly triple the stringers' lateral torsional buckling resistance.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Adriano Silva de Carvalho, Alexandre Rossi, Carlos Humberto Martins
Summary: This study conducts a parametric analysis on alveolar beams with sinusoidal web openings, evaluating their global stability and lateral torsional buckling (LTB) strength, and comparing different analysis methods. The results suggest that there may be alternative methods to the traditional double-T approach, and that the AISC-360 standard may be unsafe under certain conditions.
THIN-WALLED STRUCTURES
(2022)
Article
Construction & Building Technology
Arka Maity, Amit Kanvinde, Diego I. I. Heredia Rosa, Albano de Castro E. Sousa, Dimitrios G. Lignos
Summary: This article presents a nonlinear fiber-beam-column element (TFE) to simulate interactive buckling in steel beam-columns. The element effectively predicts the load-deformation response and internal deformation stress fields of the structure.
JOURNAL OF STRUCTURAL ENGINEERING
(2023)
Article
Engineering, Civil
Chuanbing Shawn Sun, Oluwatobi Babarinde, Dinesha Kuruppuarachchi, Daniel G. Linzell, Jay A. Puckett, Ahmed Rageh
Summary: In the 1950s and 1960s, some bridges in Louisiana were constructed using steel twin-girder or truss systems, which may lead to lateral torsional buckling (LTB) if inadequate bracing is provided. The current rating method for these bridges may underestimate their flexural strength and require load posting or bridge closure. Extensive experimental and numerical studies have shown that minimal bracing can greatly enhance LTB resistance and support the use of higher flexural strengths than predicted by current specifications.
JOURNAL OF BRIDGE ENGINEERING
(2023)
Article
Engineering, Civil
Adriano Silva de Carvalho, Vinicius Moura de Oliveira, Alexandre Rossi, Carlos Humberto Martins
Summary: Recent advancements in the production of perforated steel profiles have led to the emergence of various new opening patterns, with the sinusoidal pattern being particularly notable. However, research on these types of profiles, especially regarding global instability, is lacking. This study conducted a numerical evaluation using ABAQUS software to assess the elastic stability behavior of these elements, and proposed an analytical calculation method for beams with sinusoidal openings that showed good agreement with numerical results.
Article
Engineering, Civil
B. Jager, L. Dunai
Summary: This paper investigates the lateral-torsional buckling behavior of steel trapezoidally corrugated web girders through advanced nonlinear finite element analysis, aiming to develop a new design method for determining the LTB strength. Due to limited previous research, the rules for FE modeling of corrugated web girders are not standardized, posing challenges for LTB strength determination. The paper discusses FE modeling issues, proposes modeling regulations and necessary imperfections, including residual stresses and initial geometric imperfections.
ENGINEERING STRUCTURES
(2021)
Article
Mechanics
Chiara Bedon
Summary: The lateral torsional buckling (LTB) analysis of glass fins restrained to glass wall panels via continuous, flexible joints as lateral restraints (LRs) is critical, especially under suction. Closed-form expressions validated by Finite Element (FE) numerical models are proposed to predict the critical buckling moment of LR fins with tensioned edge restrained. A simplified linearized formulation is also suggested to capture the limit conditions for LRs in a given glass geometry, with worked examples presented for verification purposes.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
T. T. Nguyen, Sivaganesh Selvaraj, T. -M. Chan, J. T. Mottram
Summary: This paper presents the lateral-torsional buckling resistances of pultruded fibre reinforced polymer I-beams through computational analyses and sensitivity studies. Geometric and material imperfections are incorporated into the numerical simulations and the results are verified by physical tests. The study finds that combined imperfections can significantly influence the buckling resistance and load eccentricity results in complex structural response. Reliably quantifying the influence of combined imperfections is important for designing pultruded I-beam members.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
M. F. Hassanein, A. A. Elkawas, Marina Bock, M. Elchalakani, Yong-Bo Shao
Summary: This paper extends the experimental study conducted by the authors on trapezoidally corrugated web girders (CWGs) under pure bending moment (PBM). The focus is on the flexural strengths of CWGs for highway bridges, considering the effect of elastic and inelastic lateral-torsional buckling (LTB). The study uses linear and nonlinear finite element (FE) analyses and suggests modified design strengths for CWGs.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Chedid Saade, Philippe Le Grognec, Mael Couchaux, Mohammed Hjiaj
Summary: This paper investigates the lateral-torsional buckling behavior of elastoplastic steel beams under pure bending with different cross-section geometries. While critical buckling moment expressions for elastic beams are well-established, there has been less focus on lateral-torsional buckling in the elastoplastic regime. The main objective of this paper is to develop original analytical solutions for the elastoplastic lateral-torsional buckling of straight beams and validate them through numerical computations. The results show good agreement between analytical and numerical methods, demonstrating the efficiency and accuracy of the proposed analytical approach.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Construction & Building Technology
Uttam Kumar Pandit, Goutam Mondal, Devesh Punera
Summary: Corrugated web beams are popular due to their high strength-to-weight ratio, ductility, and high shear resistance. Automated production of corrugated steel plates has increased their use as structural elements. This paper presents a strain energy-based homogenization scheme to convert corrugated sections into equivalent flat sheets with modified properties. A thin-walled finite element model is used to study the lateral torsional buckling behavior of corrugated web girders. The effects of geometric parameters and loading on the buckling behavior are investigated.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Engineering, Civil
Lourenco Almeida-Fernandes, Nuno Silvestre, Joao R. Correia
Summary: This paper introduces a new design methodology to address web-crippling failure in pultruded glass fiber-reinforced polymer I-section beams, utilizing experimental and numerical data for calibration. The study derives approximate formulas for estimating web-buckling and web-crushing loads under different loading cases, and conducts finite-element analysis to enhance the robustness of the design formulations. Unified DSM expressions are found to approximate experimental and numerical results well, providing insights into slenderness ranges triggering web-crippling failure mechanisms.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Engineering, Civil
Felipe Piana Vendramell Ferreira, Rabee Shamass, Vireen Limbachiya, Konstantinos Daniel Tsavdaridis, Carlos Humberto Martins
Summary: The present study successfully developed an Artificial Neural Network formula to predict the lateral-torsional buckling resistance of slender steel cellular beams, considering different buckling modes simultaneously.
THIN-WALLED STRUCTURES
(2022)
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)