Mechanical Performance and Failure Mode Research on the Braced Frame Joint of Tower Cranes in High-Rise Building Construction

Yang, Yang; Zhang, Zhen; Xu, Liang; Yao, Gang

doi:10.3389/fmats.2022.824693

Cited by 4 publications

(1 citation statement)

References 37 publications

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“…Up to now, the hidden danger of tower crane collapse has never been completely solved, and tower crane collapse accidents are still increasing day by day. There are many low-frequency but extremely serious accidents in relevant examples 22 . According to Jiang's statistics and research on tower crane safety accidents, among many accidents in the use of tower cranes, the main forms include collapse and broken arm 23 .…”

Section: Introductionmentioning

confidence: 99%

Stress and strain analysis and parameter optimization of pipe truss tower connection of super-large tower crane based on FEM

Zeng,

Chen,

Wang

et al. 2024

Sci Rep

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Clamping bushing structure is an internode connection mechanism designed for the standard section of tubular truss tower. In this paper, the clamping bushing structure of the connecting mechanism of super-large tower crane is taken as the research object, a three-dimensional model of clamping bushing structure is established and imported into ABAQUS, and its multi-body contact model is further constructed to study the contact and bearing relationship of the structure under multiple working conditions, and the accuracy of the calculation results of the model is verified by the experimental stress test under tensile working conditions. In addition, this study is based on the control variable method, and through the design of orthogonal test table, the influence degree of five variable parameters of clamping bushing on the bearing capacity of the structure is investigated. Finally, through the range analysis, the optimal horizontal combination of variables and parameters of clamping bushing structure is obtained, and the optimal matching relationship between the shape of the tower connecting mechanism and the bearing capacity is obtained. The results show that, compared with the original model, the stress concentration at the most dangerous section of the optimized joint and the bushing is obviously alleviated, in which the stress peaks of the upper and lower joints are kept below 500 MPa, and the stress peaks of the bushing groove are also reduced to between 573 and 722 MPa. Moreover, the designed and optimized lower joint can reduce the maximum equivalent plastic strain of the joint root circumference by 56.05% under the original maximum tensile condition, and the overall distribution trend of equivalent plastic strain is more uniform, and a more reliable structural design is obtained, which plays an important guiding role in the design, optimization and analysis of the connecting mechanism of the tower body of large tower crane.

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Section: Introductionmentioning

confidence: 99%

Stress and strain analysis and parameter optimization of pipe truss tower connection of super-large tower crane based on FEM

Zeng,

Chen,

Wang

et al. 2024

Sci Rep

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Study on the influence of the fully enclosed barrier on the vortex-induced vibration performance of a long-span highway–railway double-deck truss bridge

Yang,

Li,

Yao

et al. 2024

Physics of Fluids

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Long-span highway–railway double-deck truss bridges are mostly located in urban centers, where noise pollution and traffic safety issues have a great impact. The fully enclosed barrier has excellent sound insulation and windproof performance and has been widely used in double-deck truss bridges in recent years. However, the large volume and the low air permeability rate will affect the aerodynamic characteristics of the bridge, resulting in vortex-induced vibration (VIV). To analyze how the fully enclosed barrier influences the highway–railway bridge VIV performance, this study analyzes the Huangjuetuo Yangtze River Bridge, combined with the wind tunnel test and the numerical calculation method to study different variations of the static three-force coefficient, the change of VIV response, and its influence mechanism after setting the fully enclosed barrier. The results show that the static three-force coefficient of the double-deck truss bridge changes significantly, the drag coefficient increases, and the absolute values of the lift coefficient and the moment coefficient decrease after the fully enclosed barrier is set. The aerodynamic performance of the bridge is significantly reduced after the fully enclosed barrier is set, and the amplitude and range of the VIV response are increased. Vertical bending VIV increased by an average of 58.5%, and torsional VIV increased by an average of 21.9%. Considering driving comfort and safety, attention should be paid to the double-deck truss bridge with a fully enclosed barrier.

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Semi-analytical modeling and vibration analysis of bolted frame structure under non-uniform pretension

Sun,

Chen,

Liu

et al. 2024

Mechanics Based Design of Structures and Machines

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Mechanical Performance and Failure Mode Research on the Braced Frame Joint of Tower Cranes in High-Rise Building Construction

Cited by 4 publications

References 37 publications

Stress and strain analysis and parameter optimization of pipe truss tower connection of super-large tower crane based on FEM

Stress and strain analysis and parameter optimization of pipe truss tower connection of super-large tower crane based on FEM

Study on the influence of the fully enclosed barrier on the vortex-induced vibration performance of a long-span highway–railway double-deck truss bridge

Semi-analytical modeling and vibration analysis of bolted frame structure under non-uniform pretension

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