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
Bing Feng, Ya-Hui Zhu, Fang Xie, Ju Chen, Cheng-Bin Liu
Summary: This paper experimentally examines the compressive response of hollow section, centrifugal concrete-filled GFRP tube (HS-CFGT) members, proposes new design equations, and compares them with current design specifications. New coefficients reflecting initial eccentricity and confinement are determined, aiming to improve the accuracy of predicting compressive capacity for the proposed HS-CFGT columns.
Article
Engineering, Civil
Shusheng Yi, Man-Tai Chen, Ben Young
Summary: This paper investigates the behavior of concrete-filled cold-formed steel elliptical stub columns through experimental and numerical analysis. A new design method is proposed, which accurately and reliably predicts the compressive resistance of these columns.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Junchang Ci, Hong Jia, Mizan Ahmed, Shicai Chen, Daxing Zhou, Liqun Hou
Summary: This paper introduces a new form of composite column, reports on axial compression tests, develops corresponding finite element models, and proposes suggested formulas for calculating bearing capacity.
ENGINEERING STRUCTURES
(2021)
Article
Mechanics
Xiaoyong Zhang, Wenyuan Kong, Yao Zhu, Yu Chen
Summary: This study investigates the behavior of circular winding concrete filled GFRP tubular columns with various inner section shapes. Through axial compression tests and numerical analysis, different parameters of columns were tested and analyzed. The failure mode, ultimate capacity, ductility, and stiffness of the columns were analyzed, and a calculation formula was proposed to predict the ultimate capacity of different section GFRP profile strengthening concrete-filled GFRP tubular columns. The formula was validated using a finite element model.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Cheng Fang, Facheng Wang, Chaoyang Wang, Yue Zheng
Summary: This study investigates the seismic behavior of oval hollow section beam-columns through experimental and numerical research, finding that local buckling is the primary failure mode, with variations in the failure mechanism under different bending directions.
THIN-WALLED STRUCTURES
(2021)
Article
Mechanics
Jun-Jie Zeng, Sheng-Da Liang, Yong-Long Li, Yong-Chang Guo, Guo-Yi Shan
Summary: The study proposes the use of FRP jackets to strengthen ECFST columns, with experimental results showing that increasing FRP thickness enhances the elastic stiffness and ultimate axial load of the columns; the performance of FCECFST columns is significantly better than conventional ECFST columns. A new model for ultimate axial stress and strain is introduced, with verification demonstrating its accuracy.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Ho-Jun Lee, Hong-Gun Park, In-Rak Choi, Hyeon-Jong Hwang
Summary: This study investigates the connection methods for concrete-encased-and-filled steel tube (CEFT) columns with a circular tube section and thin concrete encasement. Experimental and numerical analyses are conducted to evaluate the connection behavior under different methods.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Mechanics
Peng Feng, Zhiyuan Li, Jie Wang, TianQiao Liu
Summary: A novel joint inspired by ancient timber structures was proposed for pultruded FRP beams and concrete-filled FRP columns, providing a feasible solution for FRP frame structures. Experimental and analytical studies were conducted to assess the structural behavior and develop a design method for the joint. The joint, composed of FRP composites and concrete, exhibited excellent corrosion resistance.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Alexandra Hain, Arash E. Zaghi
Summary: The study proposes a simple connection method for circular CFFT columns and steel beams using commercial concrete anchors. Three connection assemblies were tested under half cyclic loading, showing good performance in terms of durability and shear capacity, providing a viable solution for connecting CFFT columns and beams.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Nayyer Mohammadi Rana, Elham Ghandi, Shirin Esmaeili Niari
Summary: This article investigates the dynamic response of partially concrete-filled steel tubular (PCFST) columns with elliptical cross-section under simultaneous loading of static axial compressive load and lateral impact load. The study finds that the partially filled specimens perform better than the hollow ones. The impact direction, impact block mass, and impact velocity significantly affect the failure of the columns, especially under high impact velocity. The size and shape of the impact block, however, do not have a significant effect on the displacement of the column against the impact loading.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Mechanics
K. C. Liu, C. Jiang, T. Yu, J. G. Teng
Summary: This paper presents a systematic experimental study on the axial compressive behavior of elliptical FRP tube-confined concrete columns (EFCCCs). The study found that the confinement effectiveness of FRP tubes in EFCCCs decreases with the aspect ratio and concrete strength, but increases with the FRP tube thickness. The fiber orientations in the FRP tube have a significant effect on the confinement effectiveness and failure mode of EFCCCs. Based on the test results, a new stress-strain model for the concrete in EFCCCs is proposed, which includes a more rigorous treatment of the confinement stiffness and can provide more accurate predictions for the whole stress-strain curve than existing models.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Civil
Min Lei, Ying-Lei Li, Yuan-Qi Li, Jicheng Zhang, Dewen Liu
Summary: This paper presents an experimental and theoretical study on concrete-filled T-shaped steel tubular (CFTST) beam-columns under biaxial compressive loads. The effects of various parameters on the interaction curves were investigated, and empirical interaction formulas for CFTSTs under biaxial eccentric loads were proposed. The accuracy of the proposed method was verified by experimental results and fiber element analysis.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Boshra A. Eltaly, Yousry B. Shaheen, Ahmed T. EL-boridy, Sabry Fayed
Summary: This study investigates the structural performance of lightweight ferrocement box columns filled with different types of lightweight materials. Experimental results show that using welded wire meshes instead of conventional stirrups in ferrocement concrete, combined with different filling materials, increases the ultimate load by an average of 35%, and decreases vertical and horizontal displacement by an average of 21.4% and 39.2%, respectively. A proposed equation accurately predicts the ultimate load of hollow core ferrocement concrete columns reinforced with steel meshes.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Itsaso Arrayago, Esther Real, Leroy Gardner, Enrique Mirambell
Summary: The Continuous Strength Method (CSM) is a deformation based design approach that provides accurate crosssection resistance predictions by considering the interaction between cross-section elements, plasticity spread, and strain hardening. It can be used with advanced analysis for design and improves the accuracy of beam-column capacity predictions for stainless steel members.
ENGINEERING STRUCTURES
(2021)
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)