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Title:

A Back-Calculation Method to Determine Modulus of Surfaces Systems on Orthotropic Steel Bridge Decks

Accession Number:

01340946

Record Type:

Component

Abstract:

Mechanistic design methodology for wearing surfaces on orthotropic steel decks is based on estimating the response of the structures, i.e. the critical stresses/strains due to certain design loads. The stresses/strains in wearing surfaces on steel decks are strongly influenced by the modulus of the wearing course and the stiffness of the bonding layer between them. For accurate analytical predictions, new and innovative methods are required to determine these material properties. This paper focuses on a method for back-calculation of the modulus of the wearing course and the stiffness of the bonding layer. A composite beam test was designed to determine the dynamic bending behavior. Beam specimens were tested at temperatures of -15, 5, 25, 45℃, loading frequencies of 0.1, 0.5, 1, 5, 10, 20Hz and loading levels of 1、3、5、8、10kN. A Finite Element model was developed to simulate the composite beam. Bonding layer between steel decks and the surfaces were modeled with a link element consisting of three nonlinear spring elements that enable the FE model to simulate shearing deformation. The procedure for back-calculation of the material properties is introduced. Composite beam specimens were tested according to the procedure for validation purposes. FEM analysis of the strain distribution agrees fairly well with the results of actual deflection tests on composite beams. This indicates that fairly reliable estimates of composite beam behavior can be accomplished through the application of this method. The influence of wearing surface modulus and interface stiffness on stress in the wearing surface was also analyzed through a parametric study.

Monograph Accession #:

01329018

Report/Paper Numbers:

11-4280

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Bo, Yao
Cheng, Cheng
Wang, Xiao
Cheng, Gang

Pagination:

14p

Publication Date:

2011

Conference:

Transportation Research Board 90th Annual Meeting

Location: Washington DC, United States
Date: 2011-1-23 to 2011-1-27
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures (13) ; References (7) ; Tables (4)

Uncontrolled Terms:

Composite beams

Subject Areas:

Bridges and other structures; Design; Highways; I22: Design of Pavements, Railways and Guideways; I24: Design of Bridges and Retaining Walls

Source Data:

Transportation Research Board Annual Meeting 2011 Paper #11-4280

Files:

TRIS, TRB

Created Date:

Feb 17 2011 6:48PM