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EDITORIAL

EDITORIAL Bridge Structures Vol. 4, Nos. 3–4, September–December 2008, 109–110 The first paper in this issue of Bridge Structures, by Ozgur Bezgin et al., presents ‘Response of laterally loaded group shafts for bridge foundations in cohesionless soils using a 3D FE soil-structure model’. Parameters investigated include soil modulus, shaft slenderness, shaft–soil interface, soil effective zone, shear interaction, and support conditions at the bottom of the shaft. Results from this investigation provide criteria for the effective volume of soil that needs to be included in the FE analysis for single and group shaft analysis. It also showed that shaft spacing, soil weight, soil modulus, interface conditions, and support conditions are important factors that need to be included when modeling group shafts in cohesionless soils. In the past five decades, truck loads have increased significantly due to economic growth. As a result, bridge design loads have evolved to reflect the heavier truck loads. The current AASHTO Standard Specifications adopts the HL-93 live load model which was developed based on a probabilistic approach. Recent studies showed that AASHTO legal loads do not represent the newer configuration of multi-axle single-unit trucks. The studies also indicated that truck-weight frequency distributions by vehicle type (truck-weight http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bridge Structures IOS Press

EDITORIAL

Mahmoud, Khaled M.
Bridge Structures , Volume 4 (3) – Jan 1, 2008
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Publisher
IOS Press
Copyright
Copyright © 2008 by IOS Press, Inc
ISSN
1573-2487
eISSN
1744-8999
DOI
10.1080/15732480802528072
Publisher site
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Abstract

Bridge Structures Vol. 4, Nos. 3–4, September–December 2008, 109–110 The first paper in this issue of Bridge Structures, by Ozgur Bezgin et al., presents ‘Response of laterally loaded group shafts for bridge foundations in cohesionless soils using a 3D FE soil-structure model’. Parameters investigated include soil modulus, shaft slenderness, shaft–soil interface, soil effective zone, shear interaction, and support conditions at the bottom of the shaft. Results from this investigation provide criteria for the effective volume of soil that needs to be included in the FE analysis for single and group shaft analysis. It also showed that shaft spacing, soil weight, soil modulus, interface conditions, and support conditions are important factors that need to be included when modeling group shafts in cohesionless soils. In the past five decades, truck loads have increased significantly due to economic growth. As a result, bridge design loads have evolved to reflect the heavier truck loads. The current AASHTO Standard Specifications adopts the HL-93 live load model which was developed based on a probabilistic approach. Recent studies showed that AASHTO legal loads do not represent the newer configuration of multi-axle single-unit trucks. The studies also indicated that truck-weight frequency distributions by vehicle type (truck-weight

Journal

Bridge Structures – IOS Press

Published: Jan 1, 2008

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