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Indexed by:期刊论文

Date of Publication:2011-05-01

Journal:STRUCTURAL ENGINEERING INTERNATIONAL

Included Journals:Scopus、SCIE、EI

Volume:21

Issue:2

Page Number:228-232

ISSN No.:1016-8664

Key Words:concrete box girder; widening method; SCWCBM; orthotropic steel cantilever; transverse external prestressing tendon

Abstract:In order to meet the widening requirement of urban bridges, this paper proposes a new box girder widening method steel cantilever widening concrete box girder method without piers (SCWCBM for short). According to this method, the original bridge deck is widened by the orthotropic steel decks that are laid on the cantilevers at both sides of the box girder. The cantilevers, which are set on both sides of the original box girder, are connected to the original box girder by transverse external prestressing tendons. In this paper, combined with the practical work, the widening procedure of SCWCBM is detailed. Compared with the general widening methods, SCWCBM has many advantages, such as shorter construction period, open clearance of span, lesser traffic interference, better traffic capacity and better economical benefit. SCWCBM is an effective widening method tailor-made for the urban box girder.