Article
Engineering, Civil
Shaojun Zhu, Zhangjianing Cheng, Chaozhong Zhang, Xiaonong Guo
Summary: In this study, a numerical analysis was conducted on aluminum alloy reticulated shells (AARSs) with gusset joints under fire conditions. The proposed thermal-structural coupled analysis model of AARSs considering joint semi-rigidity was validated and can be used for other structures. The study explored the buckling behavior of K6 AARS with gusset joints under fire conditions, identifying the factors influencing the reduction factor of the buckling capacity.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Shaojun Zhu, Makoto Ohsaki, Qiang Zeng, Xiaonong Guo
Summary: This paper proposes a form-finding method for free-form aluminum alloy reticulated structures with semi-rigid gusset joints, utilizing multi-objective optimization to adjust the shape and performance of the structure. The study suggests that joint rigidity should be considered in the optimization process to account for its influence on the final structural shape.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Hongbo Liu, Qian Zang, Zhihua Chen
Summary: This study investigates the stability of aluminum alloy single-layer reticulated shell structures by establishing numerical models and considering the failure of gusset joints. The results suggest that the in-plane and out-of-plane effective length factors of members are recommended to be 1.0 and 1.9 respectively. Additionally, the stable bearing capacity ratio of rigid reticulated shell, semi-rigid shell, and semi-rigid reticulated shell considering joint failure is approximately 1:0.9:0.72.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Jinzhi Wu, Jianhua Zheng, Guojun Sun, Miao Feng
Summary: This study designed an aluminum alloy reticulated shell model and conducted shaking table and dynamic response tests to analyze the stress characteristics, responses, and failure characteristics of the model under different horizontal earthquakes. The results showed that the reticulated shell model has excellent seismic performance but weak joints that should be considered in seismic design.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Jinzhi Wu, Yuhang Li, Guojun Sun, Song Chen
Summary: This study investigates the hysteretic performance of arched aluminium alloy gusset joints. Through cyclic loading tests and finite element simulations, the mechanical behavior and failure modes of the joints are analyzed. The results provide valuable insights for seismic design of aluminium alloy structures.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Zhe Xiong, Shaojun Zhu, Xiaozhou Zou, Shuyan Guo, Yu Qiu, Lijuan Li
Summary: The study shows that joint semi-rigidity can significantly reduce the buckling capacity of cylindrical reticulated shells, and the support condition also affects the buckling behavior. The elasto-plastic behavior is less sensitive to the rise-to-span ratios but more sensitive to other parameters. The derived formulae for estimating the elasto-plastic buckling capacity of cylindrical reticulated shells based on numerical analysis results are effective in practical engineering applications.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Zhihua Chen, Shuo Cui, Hongbo Liu, Yu Liu, Jianshuo Wang
Summary: In order to strengthen the connections in a single-layer aluminum alloy shell, a method of laminated double-layer members is used to form a double-layer aluminum alloy gusset joint. The hysteresis behavior of this new joint type was studied through full-scale models and compared with a single-layer joint. The analysis included the failure mode, bearing capacity, ductility coefficient, and energy dissipation capacity. Finite element models were used for validation and parametric analysis, showing that the double-layer joint increased the bearing capacity and energy dissipation significantly, but had poor ductility. Parametric analysis revealed that the bolt material affected the ultimate bearing capacity and failure mode of the joints.
Article
Chemistry, Physical
Huaihao Wang, Rongxin Guo, Yubo Zhang, Yang Yang, Weirong Xiao
Summary: This study introduces the concept of planar angle and establishes 16 joint models to analyze the influence of different parameters on the performance of aluminum alloy gusset joints. The results indicate that the planar and arch angles significantly affect the bearing capacity, stiffness, and failure mode of the joint.
Article
Engineering, Civil
Yanke Tan, Xinye Li, Qilin Zhang, Shuxiang Zhang, Zhiqiang Li, Liqiu Qiu
Summary: An improved aluminium alloy gusset joint (I-AAGJ) is proposed, which consists of two types of shear connectors (SCs) and a peripheral bending system (PBS), to address the imperfections of traditional aluminium alloy gusset joints (T-AAGJ). The mechanical performance of the I-AAGJ is investigated through full-scale testing and numerical simulation. The results show that the I-AAGJ has significantly improved joint stiffness and can withstand complex load states with the assistance of the PBS and SCs.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Physical
Hao Wang, Jialiang Li, Pengcheng Li, Li Zhong, Xiaoyue Zhang, Chao Li
Summary: By using finite element models and the non-linear code ABAQUS, the flexural performance of AAG joints under combined action of shear force and in-plane and out-of-plane bending moments was investigated. The accuracy of the simulation results based on existing AAG joint test results was verified, and the mechanical properties of AAG joints, including failure mode, deformation process, and bending moment-rotation curves, were effectively described. Additionally, a parametric study was conducted to examine the effects of various parameters on the bending behavior of AAG joints, such as the height of member section, number of bolts, radius and thickness of joint plate, bolt preload force, and ratio of in-plane to out-of-plane bending moments.
Article
Engineering, Civil
Jinzhi Wu, Mengfan Zang, Guojun Sun, Song Chen
Summary: This study designed and conducted static performance experiments to investigate the ultimate bearing capacity and stiffness of arched aluminum alloy gusset joints, exploring the effects of different arch angles on joint performance. By comparing experimental and finite element model analyses, the study highlights the importance of arch angles on joint performance.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Hongbo Liu, Bohan Li, Zhihua Chen, Yuanwen Ouyang
Summary: Aluminum alloys are widely used for structures in corrosive environments due to their advantageous properties, but they are more flexible and sensitive to cyclic loads compared to steel. This study established a constitutive model and performed numerical simulations to predict crack locations effectively, but further research is needed to improve the reliability of predicting fatigue life due to the small number of experimental joints.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Xiaonong Guo, Hang Xu, Qiang Zeng, Thol Pet
Summary: This paper investigates the springback characteristics of arched aluminum alloy gusset plate after stamping forming. Refined finite element models are established and verified against full-scale gusset plates, resulting in good agreement. The study also proposes formulas to estimate the springback value of the AAAG plate.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Wei Liu, Li Zhu, Li-Peng Ling, Yi-Di Liu, Guan-Yuan Zhao, Xiao-Bin Gao
Summary: The ultimate bearing capacity of K-type tube-gusset plate joints in ultrahigh voltage steel tube transmission towers was experimentally investigated. The experimental results showed that the main tube's bearing capacity was negatively affected by the increase in the branch and main load ratios, while negative eccentricity was beneficial to the main tube's bearing capacity. A finite element model was used to analyze the bending capacity of the K-joints, and a fitting formula was proposed to calculate the bending capacity.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Wang Gang, Zhao Caiqi, Ma Jun
Summary: This paper studies the bending performance of the new aluminium alloy flower-gusset composite joint (FGC joint) and finds that its bending stiffness and bearing capacity are improved compared to traditional gusset joints, and are very sensitive to the thickness of cover plates. Additionally, with an increase in bolt clearance, the FGC joint exhibits bolt slip phenomenon, which gradually decreases with increasing axial force, resulting in a decrease in bending stiffness and bearing capacity.
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)