Journal ArticleDOI
Seismic Performance of Steel Girder Bridges with Ductile Cross Frames Using Single Angle X Braces
TLDR
In this article, large-scale shake table experiments were performed on a straight steel I-girder bridge model to evaluate the performance of a superstructure with ductile end cross frames using single angle X braces.Abstract:
Ductile end cross frames have been proposed in the past as a seismic design and retrofit strategy for steel plate girder bridges. In this paper it is shown that with good connection details, single angles are able to undergo large cyclic deformations in excess of 6% average axial strain before failure occurs. Large-scale shake table experiments were performed on a straight steel I-girder bridge model to evaluate the performance of a superstructure with ductile end cross frames using single angle X braces. The cross frames exhibited no apparent overall strength degradation, but also a comparatively low postyield stiffness, allowing the cross frames to act as effective structural fuses. The measured base shear was 61% of the elastic base shear in response to 2.0 times the El Centro earthquake at an average drift of 3.4%. Large girder drifts were achieved without distress in the deck slab by removing selected studs between the slab and top flange of the girders at the end cross frame locations, with axial deformations in the angles well below their deformation capacity based on component experiments.read more
Citations
More filters
Journal ArticleDOI
Seismic Performance of Steel Girder Bridges with Ductile Cross Frames Using Buckling-Restrained Braces
TL;DR: In this article, buckling-restrained braces (BRBs) are investigated as ductile end cross frames and compared against the performance of yielding X braces, and the results showed that the relatively large deformation capacity of the BRBs is necessary to achieve a significant reduction in base shear.
Journal ArticleDOI
Seismic behavior of bidirectional-resistant ductile end diaphragms with buckling restrained braces in straight steel bridges
TL;DR: In this paper, the ductile end diaphragm concept developed for regular (i.e., straight) slab-on-girder or deck-truss steel bridge superstructures is expanded to make it applicable to bidirectional earthquake excitation.
Seismic Behavior of Bidirectional-Resistant Ductile End Diaphragms with Unbonded Braces in Straight or Skewed Steel Bridges
Oguz C. Celik,Michel Bruneau +1 more
TL;DR: In this article, the authors extend the known ductile end diaphragm concept to make it applicable for bidirectional earthquake excitation, using unbonded braces as the ductile fuses.
Journal ArticleDOI
Shake Table Test of Cable-Stayed Bridge Subjected to Non-Uniform Excitation
Chengyu Yang,Mo Shing Cheung +1 more
TL;DR: In this article, a double-deck cable-stayed bridge with a main span of 430m and side spans of 160m on either side was tested for non-uniform excitation and two types of tower-girder connection were considered in the testing.
References
More filters
Journal ArticleDOI
Performance of steel bridges during the 1995 Hyogo-ken Nanbu (Kobe, Japan) earthquake
TL;DR: A large number of steel bridges were damaged by the January 17, 1995, Hyogo-ken Nanbu (Kobe, Japan) earthquake as discussed by the authors, and the concentration of steel bridge in the area of severe shaking was considerably lar...
Journal ArticleDOI
Hysteretic Cycles of Axially Loaded Steel Members
TL;DR: In this article, the influence of mode of buckling and shape of cross section on the hysteresis behavior and energy dissipation through hysteretic cycles of axially loaded steel members was investigated.
Journal ArticleDOI
Cyclic Out-of-Plane Buckling of Double-Angle Bracing
TL;DR: In this paper, the behavior of double-angle bracing members subjected to out-of-plane buckling due to severe cyclic load reversals is investigated, and new design procedures are proposed for improved ductility and energy dissipation capacity.
Journal ArticleDOI
Seismic-Resistant Special Truss-Moment Frames
Subhash C. Goel,Ahmad M. Itani +1 more
TL;DR: In this article, a new design concept and procedure for seismic resistant special trussmoment frames, which have been validated by full-scale tests on full-span truss-column subassemblages.