Static Behaviors of a Long-span Cable-Stayed Bridge with a Floating Tower under Dead Loads SCIE SCOPUS

Cited 4 time in WEB OF SCIENCE Cited 4 time in Scopus
Title
Static Behaviors of a Long-span Cable-Stayed Bridge with a Floating Tower under Dead Loads
Author(s)
Jang, Minseo; Lee, Yunwoo; Won, Deokhee; Kang, Young-Jong; Kim, Seungjun
KIOST Author(s)
Won, Deok Hee(원덕희)
Publication Year
2020-10
Abstract
Owing to the structural characteristics of floating-type structures, they can be effectively applied to overcome the limitation of conventional long-span bridges in deep water. Unlike cable-supported bridges with fixed towers, floating cable-supported bridges show relatively large displacements and rotations under the same load because of floating towers; moreover, the difference in the support stiffness causes differences in the behavior of the superstructures. In addition, the risk of overturning is greater than in conventional floating offshore structures because the center of gravity of the tower is located above the buoyancy center of the floater. A floating cable-supported bridge in which the tether supports the floating main tower is directly influenced by the tether arrangement, which is very important for the stability of the entire structure. In this study, according to the inclined tether arrangement, the outer diameter of the floater, and the buoyancy vertical load ratio (BVR), the static behavioral characteristics of the long-span cable-stayed bridges with floating tower are evaluated through nonlinear finite-element analysis. When the intersection of the tension line of the tether and a pivot point of the tower coincide, the tethers can no longer resist the tower's rotation. For this reason, a large displacement occurs to equilibrate the structure, and further increases as it approaches the specific slope, even if it is not exactly the specific tether slope. The analytical model of this study indicates that, in terms of increasing the rotational stiffness of the main tower, it is advantageous to increase the floater diameter until a BVR of 1.8 is reached and to increase the axial stiffness of the tether from a BVR of 2.0 or higher.
ISSN
2077-1312
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/38571
DOI
10.3390/jmse8100816
Bibliographic Citation
JOURNAL OF MARINE SCIENCE AND ENGINEERING, v.8, no.10, 2020
Publisher
MDPI
Subject
ULTIMATE BEHAVIOR; WIND; WAVE
Keywords
cable-stayed bridge; floating bridge; global static performance; nonlinear analysis; ocean and shore technology; tether arrangement; Ocean and Shore Technolog
Type
Article
Language
English
Document Type
Article
Publisher
MDPI
Related Researcher
Research Interests

Ocean and coastal engineering,Structural engineering,Fire engineering,해양해안공학,구조공학,화재공학

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse