Research on mechanical characteristics and key technology of integral intelligent lifting construction of large-span heavy steel box girder
Xiaofeng Liu, Mingliang Li, Zhi Geng, Shuhong Zhu, Wenjie Li, Bin Liang
TL;DR
This paper studies the mechanical behavior and control methods for safely lifting large steel girders in construction projects.
Contribution
A new integral lifting system and control method are proposed to improve safety and orientation during lifting.
Findings
An alignment device improves precise control of orientation and stress during lifting.
Stress and deformation remain minimal in synchronous lifting despite internal force redistribution.
Asynchronous lifting within error limits is safe, with maximum stress at 74 MPa and displacement at 70 mm.
Abstract
This paper aims to address the problems of aerial orientation control and safety in sudden extreme working conditions during the integral intelligent lifting of large-span heavy steel box girder. Based on the project of Xiaotun Bridge of Fuyi Expressway, a new integral lifting system and control method were proposed. To prevent extreme conditions during the lifting process, the mechanical properties of steel box girders in both synchronous and asynchronous integral lifting states were investigated using the finite element method. Moreover, the mechanical properties of the steel box girders during the lifting process were analyzed through on-site monitoring. The results show that an alignment device has been added to the existing synchronous hydraulic lifting system, which achieves precise control of the aerial orientation and stress of each component of the steel box girder through…
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Taxonomy
TopicsStructural Engineering and Vibration Analysis · Concrete Corrosion and Durability · Structural Health Monitoring Techniques