Seismic Response of Multi-Span Simply Supported Bridges Having Steel Columns

Date

1996-01-01

Author

Dicleli, Murat

Metadata

Show full item record

Item Usage Stats

146
views

0
downloads

Seismic response of existing multi-span simply supported steel highway bridges, never designed to resist earthquakes, is studied. Dynamic analyses are conducted for bridges with different bearing stiffness, span length and number of spans. It is found that the response of two span simply supported bridges is highly dependent on the stiffness of fixed-bearings on the abutments, but this effect vanishes as the number of spans increases. The transverse direction seismic capacity of bridges having more than two spans is not a function of the number of spans. These bridges may be damaged by earthquakes having peak accelerations less than 0.20g. However, bridges with identical end-to-end length but subdivided into a smaller number of spans are found to be more vulnerable to seismic excitations than those with larger number of spans. Increasing span length is also found to have a negative impact on the seismic capacity of these bridges. Additionally, analytical expressions to calculate the minimum required seat width are developed.

Subject Keywords

Steel, Multi-Span Simply Supported Bridges, Seismic Excitation, Bearing Stiffness, Seat Width, Seismic Capacity

URI

https://hdl.handle.net/11511/84435

Conference Name

Eleventh World Conference on Earthquake Engineering (01 Ocak 1996)

Collections

Department of Engineering Sciences, Conference / Seminar

Suggestions

OpenMETU
Core

Seismic performance of multispan simply supported slab-on-girder steel highway bridges Dicleli, Murat (1995-01-01) The seismic response of existing multispan simply supported slab-on-girder steel highway bridges, never designed to resist earthquakes, is studied. Elastic response spectrum analyses are conducted for bridges with different bearing stiffness, span length and number of spans. It is found that the response of two-span simply supported bridges is highly dependent on the stiffness of fixed bearings on the abutments, but this effect vanishes as the number of spans increases. The transverse direction seismic capa...
Fragility based seismic vulnerability assessment of ordinary highway bridges in Turkey Avşar, Özgür; Yakut, Ahmet; Department of Civil Engineering (2009) Recent devastating earthquakes revealed that bridges are one of the most vulnerable components of the transportation systems. These seismic events have emphasized the need to mitigate the risk resulting from the failure of the bridges. Depending on the seismicity of the bridge local site, seismic vulnerability assessment of the bridges can be done based on the fragility curves. These curves are conditional probability functions which give the probability of a bridge attaining or exceeding a particular damag...
Seismic Retrofitting of Typical Illinois Bridges by Response Modification Dicleli, Murat (null; 2004-01-01) The impact of seismic retrofitting of typical Illinois bridges, via response modification using friction pendulum bearings (FPB), on the state economy is studied. For this purpose, two typical bridges with distinct characteristics were selected by Illinois Department of Transportation (IDOT). The seismic analyses of the bridges revealed that the bearings, wingwalls and substructures are vulnerable and need to be retrofitted. Conventional retrofitting strategies are developed for the bridges and the retrofit...
Seismic response of multi-span highway bridges with two-column reinforced concrete bents including foundation and column flexibility Yılmaz, Taner; Caner, Alp; Department of Civil Engineering (2008) Seismic design of highway bridges has improved as a result of the experience gained from large earthquakes of the last thirty years. Ductility demand and reserved capacity are extremely important response measures used in new bridge designs to assess target damage levels. However, the application of practical design approaches specified in bridge design codes is not well-defined for bridges over flexible foundations. Within the scope of this research, thirty two bridge models having varying column aspect ra...
SEISMIC PERFORMANCE OF SINGLE-SPAN SIMPLY SUPPORTED AND CONTINUOUS SLAB-ON-GIRDER STEEL HIGHWAY BRIDGES Dicleli, Murat (1995-10-01) Seismic response of single-span simply supported and continuous slab-on-girder steel bridges is studied. Linear elastic and nonlinear inelastic analyses are conducted for various ground-acceleration inputs. Bearings with higher stiffnesses that are closer to the edge of the deck are found to attract larger forces than other bearings, whereas bearings with small stiffness attract almost equal forces regardless of the width of the brid e. Assuming that the anchors of otherwise stable bearings are severed, sli...

Citation Formats

M. Dicleli, “Seismic Response of Multi-Span Simply Supported Bridges Having Steel Columns,” Acapulco, Meksika, 1996, p. 1, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/84435.