A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Web design of box girders concrete bridges
Highlights In concrete box girder bridges transverse bending moments in the webs can be equilibrated by eccentricity of the strut. If maximum strut eccentricity is reached additional moment requires additional steel. Experiment shows oscillating strut equilibrating cyclic transversal bending. Stirrup fatigue failure occurred systematically near the connection web-bottom flange.
Abstract The purpose of this paper is to introduce a new design approach including the Ultimate Limit State (ULS) due to fatigue. Different criteria for the design of those webs are compared by means of shear-bending moment interaction diagrams, as an attempt to identify the most realistic one. An experimental investigation was undertaken with the purpose of verifying the validity of the newly developed approach. The following failure modes were considered: excessive plastic deformation of the stirrups, crushing of the compressed struts and failure of the stirrups due to fatigue. The experimental results showed good agreement with the results of the proposed approach. Furthermore, the tests revealed new aspects of the fatigue behavior: the failure of the stirrups due to fatigue occurred in stages, one at a time in a gradual manner. In all cases, failure took place near the connection between the web and the bottom flange.
Web design of box girders concrete bridges
Highlights In concrete box girder bridges transverse bending moments in the webs can be equilibrated by eccentricity of the strut. If maximum strut eccentricity is reached additional moment requires additional steel. Experiment shows oscillating strut equilibrating cyclic transversal bending. Stirrup fatigue failure occurred systematically near the connection web-bottom flange.
Abstract The purpose of this paper is to introduce a new design approach including the Ultimate Limit State (ULS) due to fatigue. Different criteria for the design of those webs are compared by means of shear-bending moment interaction diagrams, as an attempt to identify the most realistic one. An experimental investigation was undertaken with the purpose of verifying the validity of the newly developed approach. The following failure modes were considered: excessive plastic deformation of the stirrups, crushing of the compressed struts and failure of the stirrups due to fatigue. The experimental results showed good agreement with the results of the proposed approach. Furthermore, the tests revealed new aspects of the fatigue behavior: the failure of the stirrups due to fatigue occurred in stages, one at a time in a gradual manner. In all cases, failure took place near the connection between the web and the bottom flange.
Web design of box girders concrete bridges
Gaspar, Ricardo (author) / Stucchi, Fernando Rebouças (author)
Engineering Structures ; 57 ; 267-275
2013-09-06
9 pages
Article (Journal)
Electronic Resource
English
Bridges , Concrete , Shear , Transverse bending , Fatigue
Web design of box girders concrete bridges
| Online Contents | 2013
Bridges having concrete-steel girders
| Engineering Index Backfile | 1940
Design of continuous highway bridges with precast, prestressed concrete girders
| Engineering Index Backfile | 1969
Torsional shear in girders of skewed concrete bridges
| Engineering Index Backfile | 1945