Study on truss type segmental composite structure for temporary rescue bridge
Journal
ICCM International Conferences on Composite Materials
Journal Volume
2019-August
Date Issued
2019
Author(s)
Abstract
Typhoons and earthquakes, which occur frequently in Taiwan, often lead to the washout or collapse of river bridges, thereby causing traffic interruption. The temporary rescue bridge is recognized as being considered to be the approach of disaster relieving operation, when a bridge structurally loses its workability. In this paper, a truss type segmental composite temporary rescue bridge is proposed, and a 50-m span asymmetric self-anchored truss type segmental cable-stayed bridge is designed, and experimentally validated to improve the stiffness of a longer span (50m) bridge. The proposed autonomous assembly technology for construction were validated by an on-site experiment and virtual model experiment. The assembly process had been found to improve the worker safety of the bridge construction and shorten assembly time of the bridge. Two different construction processes, the cantilever erection method and the incremental launching method, had be compared to improve the safety of the workers. The results of this study indicated that: (1) the truss type segmental composite bridge could improve the stiffness of 50-m span temporary rescue bridge to meet the requirement of deflection-to-span ratio; (2) autonomous assembly technology for bridge construction has a significant contribution to improving the worker safety and shortening assembly time of the temporary rescue bridge; (3) the incremental launching method has more operational efficiency then the cantilever erection method; (4) the incremental launching method could prevent workers from constructing above the river and should be more secure for safety. ? 2019 International Committee on Composite Materials. All rights reserved.
Subjects
Cable stayed bridges; Composite materials; Launching; Nanocantilevers; Occupational risks; Stiffness; Temporary bridges; Trusses; Assembly process; Autonomous assembly; Bridge constructions; Construction process; Incremental launching method; Operational efficiencies; River bridges; Virtual modeling; Composite bridges
Other Subjects
Cable stayed bridges; Composite materials; Launching; Nanocantilevers; Occupational risks; Stiffness; Temporary bridges; Trusses; Assembly process; Autonomous assembly; Bridge constructions; Construction process; Incremental launching method; Operational efficiencies; River bridges; Virtual modeling; Composite bridges
Type
conference paper