Year: 2014
Type: article
Abstract: A new type of bridge called "butterfly web bridge" is under construction in Japan.In a butterfly web bridge, the butterfly-shaped web forms a structure that exhibits behavior similar to a double Warren truss.The 80 MPa concrete is used for the butterfly web which has a precast plate with a thickness of 150 mm.As butterfly web is a concrete material, reinforcement provided by prestressing tendons is needed on the tension side.Moreover, the 150 mm plate has no re-bars but is reinforced by steel fibers.This bridge, named Takubogawa Bridge, is a highway bridge and has 10 spans including the 87.5 m maximum span length.Takubogawa Bridge is constructed by free cantilevering method.The butterfly web enables the construction speed of cantilevering to be advanced about 50% compared with conventional cast-in-situ method and can meet the requirement of light weight and low maintenance.
Authors: Kenichiro Ashizuka, Kenji Miyamoto, Kenichi Kata, Akio Kasuga
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W563012255