Calculation Models of Ultimate Bearing Capacity and Failure Modes for Transmission Tower Under Wind Load(PDF)
《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]
- Issue:
- 2018年02期
- Page:
- 47-55
- Research Field:
- Publishing date:
Info
- Title:
- Calculation Models of Ultimate Bearing Capacity and Failure Modes for Transmission Tower Under Wind Load
- Author(s):
- CHEN Zheng; TANG Ke-ren; ZHOU Qiang; ZHANG Wei; CHEN Jia-qi
- College of Civil Engineering and Architecture, Guangxi University
- Keywords:
- transmission tower; calculation model; wind load; ultimate bearing capacity; failure mode
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to solve the problem of not taking account of the influence of calculation models on ultimate bearing capacities and failure modes of the existing transmission towers, the fundamental mechanical principles and simulation methods of the three commonly used models, including space truss, space rigid frame and space beam-truss, were illustrated. Taking a 110 kV drum type linear transmission tower as an example, the elastic responses of 3 calculation models under for 0°,45°,60°, 90° wind load were compared. The calculation results of the ultimate bearing capacity and failure mode of each calculation model under the most unfavorable conditions were compared and analyzed. The influences of different calculation models on the ultimate bearing capacity and failure modes of structure were revealed. The results show that the rigid frame and beam-truss model can give safe elastic response results compared with the truss model. The limit live load multiplier of this type of transmission tower is about 2.00 under the worst wind load condition. The beam-truss composite model can reflect the ductility failure properties of the tower structure and give safer calculated results of ultimate bearing capacity. The bearing components of this kind of transmission tower mainly concentrate in the tower leg materials. The rigid frame and beam-truss model can accurately identify high load bearing member. The space beam-truss composite model is proposed to be used for analyses of ultimate bearing capacity and failure mode of the transmission tower.
Last Update: 2018-04-04