Effectiveness of the 30%-rule at predicting the elastic seismic demand on bridge columns subjected to bi-directional earthquake motions

The adequacy of the 30%-rule to predict the seismic demand on bridge columns subjected to bi-directional earthquake components is examined for two North American sites in areas of moderate seismic hazard: Montreal, in the east, and Vancouver, along the west coast. For both sites, historical and simu...

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Bibliographic Details
Published inEngineering structures Vol. 33; no. 8; pp. 2357 - 2370
Main Authors Khaled, A., Tremblay, R., Massicotte, B.
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.08.2011
Elsevier
Subjects
Applied sciences
Bi-directional earthquake components
Bridge elements
Bridges
Bridges (structures)
Buildings. Public works
Columns
Combination rule
Demand
Earthquake engineering
Earthquake response
Exact sciences and technology
Geotechnics
Grounds
Marketing
Seismic engineering
Seismic phenomena
Stresses. Safety
Structural analysis. Stresses
Structure-soil interaction
Tributaries
Canada
North America
America
Bridges
Columns
Bi-directional earthquake components
Earthquake response
Combination rule
Dynamic response
Earthquake effect
Forecast model
Modeling
Recommendation
Seismic design code
Analysis method
Seismic analysis
Column
Bridge pier
Comparative study
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Summary:The adequacy of the 30%-rule to predict the seismic demand on bridge columns subjected to bi-directional earthquake components is examined for two North American sites in areas of moderate seismic hazard: Montreal, in the east, and Vancouver, along the west coast. For both sites, historical and simulated ground motion earthquake ensembles are considered. Time history analyses were performed on generic bridge models to determine the critical response of the columns under pairs of orthogonal seismic ground motion time histories. Response spectrum analyses were also carried out to determine the maximum response in each direction and the critical response was estimated using the 30%-rule. The results show that the combination rule is tributary of both ground motion and bridge characteristics. Results also show that the 30%-rule as currently prescribed in codes leads to an adequate estimation of the bi-directional elastic seismic demand on regular bridge columns.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0141-0296
1873-7323
DOI:10.1016/j.engstruct.2011.04.009