DIRECT MOVING LOAD ENVELOPE ANALYSIS EQUATIONS FOR BRIDGE GIRDERS

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)1-22
Journal / PublicationInternational Journal of Bridge Engineering
Volume7
Issue number3
Publication statusPublished - Sep 2019

Abstract

Accurate and practical direct envelope equations for moving load analysis are needed these days for many reasons. Over or under estimating the load capacity in pre-stressed bridge girders may raise concerns about safety and serviceability. Moreover, direct envelope equations lead to efficient and economical design of bridge structures. Finally, these equations can provide more accurate results compared to those obtained using a commercial software program. This study develops direct envelope analysis equations for moving loads on bridge girders. The analysis consists of maximum positive support moments, positive and negative shear envelope equations, negative moment envelope equations and maximum point of deflection. The analysis is based on one dimensional slope moment matrix method designed to calculate support moments of structural members. Maximum point of deflection is based on general deflection equation. Fixed and pinned end support conditions are applied since there is no cantilever bridge girder. Detailed Comparison between this paper results and commercial software program (STAAD) will be made to prove their accuracy and practicality. Most of the commercial software programs have been concentrated on interval distance calculation of moving load analysis. In comparison, this study is conducted on the continuous moving of wheel loads (interval distance is equal zero); hence the calculations obtained are more accurate.

Research Area(s)

  • Bridge Girder, Equations, General Analysis, Envelope, Moving loads