Live load radial moment distribution for horizontally curved bridges

Woo Seok Kim, Jeffrey A. Laman, Daniel G. Linzell

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The present study is designed to determine the effect of major parameters on maximum total bending moments of curved girders, establish the relationship between key parameters and girder distribution factors (GDFs), and develop new approximate distribution factor equations. A level of analysis study using three numerical models was performed to establish an appropriate numerical modeling method on the basis of field test results. A total of 81 two-traffic lane curved bridges were analyzed under HL-93 loading. Two approximate GDF equations were developed based on the data obtained in this study: (1) a single GDF based on total girder normal stress; and (2) a combined GDF treating bending and warping normal stress separately. The two equations were developed based on both an averaged coefficient method and regression analysis. A goodness-of-fit test revealed that the combined GDF model developed by regression analysis best predicted GDFs. The present study demonstrated that radius, span length, cross frame spacing and girder spacing most significantly affect GDFs. The proposed GDF equations are expected to provide a more refined live load analysis for preliminary design.

Original languageEnglish (US)
Pages (from-to)727-736
Number of pages10
JournalJournal of Bridge Engineering
Issue number6
StatePublished - Oct 22 2007

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction


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