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The Role of Braced Frame Joint Performance in Tower Crane Safety
Each year, the heights of high-rise buildings continue to rise, reflecting the relentless pursuit of architectural innovation. However, this ambitious upward trend often results in longer construction durations for many projects. At the forefront of this construction effort is the tower crane, a critical piece of equipment indispensable for the loading and unloading of materials across various sites.
Tower cranes function as multi-degree freedom systems, adeptly managing not only their own weight but also the significant loads they lift, which are supported by the braced frame joint (BFJ). This joint is responsible for transferring loads safely to the high-rise structure. However, the performance of the BFJ is subject to dynamic magnification effects, which can compromise its reliability, particularly due to the whiplash effect caused by external excitations.
Furthermore, the complexity of operating tower cranes carries inherent risks, leading to engineering accidents that can occur during both installation and operation. Such incidents highlight the critical importance of rigorous safety measures and diligent oversight in the dynamic landscape of high-rise construction.
The safety of construction machinery and the mechanical performance of structures in construction are critical areas of concern. Accidents in this realm can be categorized into two types:
The safety of tower cranes has been examined through various lenses, including the stages of installation and dismantling, as well as factors such as selection, location, earthquakes, wind, and overall layout. Furthermore, intelligent monitoring systems and improved crane operations have become focal points in contemporary research.
Furthermore, the complexity of operating tower cranes carries inherent risks, leading to engineering accidents that can occur during both installation and operation. Such incidents highlight the critical importance of rigorous safety measures and diligent oversight in the dynamic landscape of high-rise construction.
The safety of construction machinery and the mechanical performance of structures in construction are critical areas of concern. Accidents in this realm can be categorized into two types:
- low-frequency, high-severity incidents and
- high-frequency, low-severity occurrences.
The safety of tower cranes has been examined through various lenses, including the stages of installation and dismantling, as well as factors such as selection, location, earthquakes, wind, and overall layout. Furthermore, intelligent monitoring systems and improved crane operations have become focal points in contemporary research.
Accident of tower crane during installation
The mechanical performance of the braced frame joint (BFJ) in tower cranes is pivotal to their overall safety. Traditional enhancement methods—such as increasing the cross-sectional area, implementing additional support measures, and embedding the joint into both sides of a wall—are commonly employed to boost the reliability of the BFJ. However, since the BFJ serves as a temporary installation during construction and is dismantled upon completion of the primary structure, measures like increasing the reinforcement ratio or the size of pre-embedded steel components (PESC) can lead to increased costs and labor, contradicting the principles of economic limit state design.
This research below evaluas the mechanical performance and failure mode of BFJ in high-rise building construction.The working performance of BFJs are examined using reduced scale model tests, numerical simulations, and theoretical analysis.
This research below evaluas the mechanical performance and failure mode of BFJ in high-rise building construction.The working performance of BFJs are examined using reduced scale model tests, numerical simulations, and theoretical analysis.
Authors
- Yang YangChina
Key Laboratory of NewTechnology for Construction of Cities in Mountain Area - Zhen ZhangChina
Key Laboratory of NewTechnology for Construction of Cities in Mountain Area - Liangjin XuChina
Key Laboratory of NewTechnology for Construction of Cities in Mountain Area - Gang YaoChina
Key Laboratory of NewTechnology for Construction of Cities in Mountain Area
About WHCM
Welld Harbin Construction Machinery (also known as WELLD) aims to elevate its position as a premier Chinese сonstruction machinery enterprise by pursuing internationalization and enhancing its industry chain, alongside establishing efficient operational, research and management systems. Through these strategies, the company seeks to deliver high-quality construction equipment to customers globally, reinforcing its commitment to excellence in the engineering machinery sector.
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