Experimental and numerical research on gear-bolt joint for free-form grid spatial structures

Ma, Hongwei; Ma, Yueyang; Yu, Zhiwei; Fan, Feng

doi:10.1016/j.engstruct.2017.06.076

Cited by 33 publications

(6 citation statements)

References 14 publications

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“…Prestressed cable tensioning construction is a complex and systematic project with multi-element, cross-professional, strong coupling, and multi-dimensional characteristics, and the tensioning quality is easily disturbed by various uncertain disturbance factors. The operation of the tensioning system also has significant dynamic and nonlinear characteristics [29], which results in cumbersome multi-dimensional and multi-element problems of modeling, optimization, and closed-loop convergence control in large tensioning systems. To construct an intelligent cable body model and analyze the performance optimization of the tensioning system, a tensioning system control center driven by the fusion of DTs and AI was constructed, as depicted in Figure 6.…”

Section: Tensioning System Control Center Driven By the Integration O...mentioning

confidence: 99%

Intelligent Tensioning Method for Prestressed Cables Based on Digital Twins and Artificial Intelligence

Liu

Shi

Zhang

et al. 2020

Sensors

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In this study, to address the problems of multiple dimensions, large scales, complex tension resource scheduling, and strict quality control requirements in the tensioning process of cables in prestressed steel structures, the technical characteristics of digital twins (DTs) and artificial intelligence (AI) are analyzed. An intelligent tensioning of prestressed cables method driven by the integration of DTs and AI is proposed. Based on the current research status of cable tensioning and DTs, combined with the goal of intelligent tensioning, a fusion mechanism for DTs and AI is established and their integration to drive intelligent tensioning of prestressed cables technology is analyzed. In addition, the key issues involved in the construction of an intelligent control center driven by the integration of DTs and AI are discussed. By considering the construction elements of space and time dimensions, the tensioning process is controlled at multiple levels, thereby realizing the intelligent tensioning of prestressed cables. Driven by intelligent tensioning methods, the safety performance evaluation of the intelligent tensioning process is analyzed. Combined with sensing equipment and intelligent algorithms, a high-fidelity twin model and three-dimensional integrated data model are constructed to realize closed-loop control of the intelligent tensioning safety evaluation. Through the study of digital twins and artificial intelligence fusion to drive the intelligent tensioning method for prestressed cables, this study focuses on the analysis of the intelligent evaluation of safety performance. This study provides a reference for fusion applications with DTs and AI in intelligent tensioning of prestressed cables.

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Section: Tensioning System Control Center Driven By the Integration O...mentioning

confidence: 99%

Intelligent Tensioning Method for Prestressed Cables Based on Digital Twins and Artificial Intelligence

Liu

Shi

Zhang

et al. 2020

Sensors

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“…1,2 In free-form surface reticulated shell structures, joints play a crucial role in ensuring structural safety and controlling construction costs. 3,4 At present, joints used in free-form surface reticulated shell structure can be divided into welded joints and fabricated joints. Welded joints are usually simplified as rigid connection joints due to their large connection stiffness and good integrity, while fabricated joints are mainly characterized as the form of semi-rigid joints between the articulated and the rigid joints.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical analysis and model manufacturing of innovative mortise and tenon hollow spherical joint

Gu,

Du,

Tang

et al. 2023

International Journal of Space Structures

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One of the main challenges for free-form surface reticulated shell structure recently is the development of a new joint that is able to implement complex-shaped curvature and fulfill the required loading capacity, whilst also meeting various important requirements such as convenient on-site assembly and suitability for connecting members with various cross-sectional forms. This article draws inspiration from the construction idea of Chinese traditional mortise and tenon structure and proposes a new type of mortise and tenon hollow spherical joint. To investigate the joint’s mechanical performance, the detailed numerical models of 29 mortise and tenon hollow spherical joints with different size parameters are established by SolidWorks and Ansys, and the effects of the hollow spherical wall thickness, tooth width, tooth spacing, tooth height and tenon face width on the joint bearing performance are analyzed. The joint failure modes under bending limit states are discussed, and the calculation formulas for the initial and elastic-plastic stage rotational stiffness are derived. The results show that the joint initial rotational stiffness is increased by 34.45%, 4.69%, 4.29%, and 3.25%, respectively, after the parameter optimization analysis of the hollow spherical wall thickness, tooth width, tooth spacing and tenon face width. The mortise and tenon hollow spherical joint has good mechanical performance, and possesses the advantages of simple and beautiful appearance, fast construction speed and high positioning accuracy. Finally, a reduced-scale model of the mortise and tenon hollow spherical joint is manufactured using 3D printing technology to visually showcase its external feature and validate its assembly characteristic.

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“…However, there is currently a lack of research on the mechanical performance of SHJ-BSSP joints. In general, the mechanical performance of joints can be obtained through experiments (Ma et al 2017), numerical simulation (Ma et al 2016a, b) or analytical methods (EN 1993(EN -1-8 2005Wald et al 2000;Yang et al 2016). R.W.…”

Section: Monotonic and Cyclic Loading 1 Introductionmentioning

confidence: 99%

Study on the rotational performance of steel hub joints of wood reticulated domes subjected to monotonic and cyclic bending moment

Li,

Zhu,

Niu

2023

Preprint

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Steel hub joints with bolted steel side plates (SHJ-BSSP) has been widely adopted in wood reticulated domes, yet few studies have been conducted on its mechanical behaviour. This paper presents a refined finite model for SHJ-BSSP joints, which is verified against existing test results and used for further parametric study on the rotational performance of SHJ-BSSP joints subjected to monotonic and cyclic bending moment. The flexural stiffness and capacity of joints about the strong and weak axes is investigated, accounting for influences from axial compression and the number of shear bolts. The results indicate that the joints, under monotonic loading, demonstrate typical elastic-plastic behavior. Higher compression force and more shear bolts can enhance rotational stiffness and ultimate moment of the joint, while decreasing the ductility due to the earlier yielding of wood within the bearing region of the joint. Under cyclic loading, the hysteretic curves of joints exhibit an obvious pinched hysteretic behavior due to the clearances within the joint. As a result of the second order bending moment stemming from axial compression force, the slipping region of the hysteretic curves tend to deviate from the horizontal coordinate axis. Furthermore, larger compression and more shear bolts can increase the total energy dissipation of the system while decreasing the proportion of energy dissipation from the bolted connections. Conclusions are drawn regarding the feature and failure mechanism of the SHJ-BSSP joints, which are helpful guidelines for practical design.

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Experimental and numerical research on gear-bolt joint for free-form grid spatial structures

Cited by 33 publications

References 14 publications

Intelligent Tensioning Method for Prestressed Cables Based on Digital Twins and Artificial Intelligence

Intelligent Tensioning Method for Prestressed Cables Based on Digital Twins and Artificial Intelligence

Theoretical analysis and model manufacturing of innovative mortise and tenon hollow spherical joint

Study on the rotational performance of steel hub joints of wood reticulated domes subjected to monotonic and cyclic bending moment

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