- BUILDING STRUCTURES, BUILDINGS AND FACILITIES
- Using The Criterion Of Local Strength In The Design Of Units Of Crane Structures
- UDC 69.059.032:539.4 DOI: 10.33622/0869-7019.2020.10.60-64
Vladimir V. EVDOKIMOV, e-mail: v.evdokimov@stako.ru
Denis E. GOLUBEV, e-mail: d.golubev@stako.ru
Vadim V. KOSENKOV, e-mail: v.kosenkov@stako.ru
Alexey V. SHURINOV, e-mail: a.shurinov@stako.ru
Melnikov Central Research and Design Institute of Steel Structures, ul. Arkhitektora Vlasova, 49, Moscow 117997, Russian Federation
Abstract. The article considers the calculation method used in the design of joints of cyclically loaded elements of metal structures of a crane truss for bridge support cranes of the 7K operating mode. The reasons why traditional methods of calculating the fatigue of metal structures elements joints, adopted in current national and foreign regulatory documents, cannot be used are indicated. The feasibility of using the fatigue calculation method based on the local strength criteria in the design of complex geometric joints is justified. The influence of the changes made to the design of the joint on the stress state in the zones of potential crack formation is clearly illustrated. This made it possible to solve the problem of choosing the optimal design solutions for the most loaded joints that limit the fatigue life of the structure as a whole, and ensuring the period of operation of the crane truss before the onset of fatigue cracks for at least 10 years under the current loading modes.
Key words: crane structures (trusses), stress concentration, fatigue cracks, durability, design of complex geometric units, fatigue calculation methods, local strength criterion, optimal design solutions. - REFERENCES
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