Abstract
Crane structures are the most vulnerable in buildings and structures because of their early wear in comparison with other building structures. The wear of crane structures is because of the appearance and the development of fatigue damage nature. The article presents the constructive solutions developed by the authors for strengthening the structures of steel crane beams with conventional and corrugated walls which allow to reduce the influence of the negative influence of installation, operation and technological processes on their operational durability. The most dangerous installation defect is the displacement of the crane rail axis relative to the axis of the crane beams wall. Value of this shift is exceeded several times in the cases considered below. It is proposed to use crane beams with corrugated walls to solve this problem. The authors have developed and implemented a project to restore the performance of steel crane beams by strengthening the walls of damaged beams without stopping production. Strengthening was performed on the outside of the eccentricities of the application of loads from crane rails by creating a truss structure parallel to the I-beam with chords of I-beams, which made it possible to significantly reduce the magnitude of local stresses from moments, the magnitude of transverse forces and consequently shear stresses, which are the main factors in the appearance and development of fatigue cracks in their walls.
Highlights
Crane structures are the most vulnerable in buildings and structures because of their early wear in comparison with other building structures
The durability of building structures is significantly influenced by the features of crane effects, the presence of structural imperfections in the crane beams, as well as defects in
The constructive solution of reinforcement made it possible to significantly reduce the magnitude of local stresses from moments, the magnitude of transverse forces and, shear stresses, which are the main factors in the appearance and development of fatigue cracks in their walls [7]
Summary
Crane structures are the most vulnerable in buildings and structures because of their early wear in comparison with other building structures. The term of their normal operation with direct participation in the production cycle is usually several times less than that of other structures. At the end of the service life, if reinforcement is impossible, replacement of damaged crane structures is required which is not always possible because of the peculiarities of production processes. The wear of the crane structures is because of the appearance and development of fatigue damage. Multiple changes in the stress-strain state of crane structures lead to damage which significantly reduces their durability
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
