Open AccessStudy on the Efficiency of Prestressing Application in Prestressed Composite Bridges
Author(s) -
Bing Qi,
Chao Zhang,
Shun Dong,
Quansheng Chen,
Jungen Tang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/719/3/032082
Subject(s) - slab , structural engineering , prestressed concrete , girder , materials science , ultimate tensile strength , composite number , composite material , geotechnical engineering , engineering
In order to study the proportion of prestressing between concrete slab and steel girder in different forms of prestressed composite bridges, this paper analysed the distribution of prestressing between concrete slab and steel girder when conventional prestressing method and post-tensioned prestressing method were used in the negative moment region respectively, against the background of a certain project. The results showed that 43.65% of the total prestressing applied by the conventional prestressing method was transferred to the steel girder, and nearly half of the prestressing tendons failed to reduce the tensile stresses in the concrete slab; the use of post-tensioned prestressing reduced the number of prestressing tendons by 65.6% relative to the traditional prestress application method.