In this paper a study about stay stressing procedures of concrete arch bridges built by cantilevering with temporary stays is presented. Particularly the partial elastic scheme method is proposed to find the initial cable forces and a forward procedure is implemented to follow the actual sequence of construction, by extending a procedure already applied to concrete cable-stayed bridges. The theoretical treatment is followed by a numerical application on a case-study of a concrete arch bridge and a comparison between initial cable forces found by partial elastic scheme method and by classical backward analysis is presented here. Results show the effectiveness of the proposed procedure in order to achieve the requested design geometry of the arch and for limiting the variation of bending moments and stay forces in construction stages.
Partial Elastic Scheme Method in Cantilever Construction of Concrete Arch Bridges
RECUPERO, Antonino;
2013-01-01
Abstract
In this paper a study about stay stressing procedures of concrete arch bridges built by cantilevering with temporary stays is presented. Particularly the partial elastic scheme method is proposed to find the initial cable forces and a forward procedure is implemented to follow the actual sequence of construction, by extending a procedure already applied to concrete cable-stayed bridges. The theoretical treatment is followed by a numerical application on a case-study of a concrete arch bridge and a comparison between initial cable forces found by partial elastic scheme method and by classical backward analysis is presented here. Results show the effectiveness of the proposed procedure in order to achieve the requested design geometry of the arch and for limiting the variation of bending moments and stay forces in construction stages.Pubblicazioni consigliate
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