A Review of the HL-93 Bridge Traffic Load Model Using an Extensive WIM Database

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Title: A Review of the HL-93 Bridge Traffic Load Model Using an Extensive WIM Database
Authors: Leahy, Cathal
O'Brien, Eugene J.
Enright, Bernard
Hajializadeh, Donya
Permanent link: http://hdl.handle.net/10197/7068
Date: Oct-2014
Abstract: HL-93, the current bridge traffic load model used in the United States is examined here. Weigh-in-motion (WIM) data from 17 sites in 16 states containing 74 million truck records are used to assess the level of consistency in the characteristic load effects (LEs) implied by the HL-93 model. The LEs of positive and negative bending moments and shear force are considered on single- and two-lane same-direction slab and girder bridges with a range of spans. It is found that the ratio of WIM-implied LE to HL-93 LE varies considerably from one LE to another. An alternative model is proposed that achieves improvements in consistency in this ratio for the LEs examined, especially for the single-lane case. The proposed model consists of a uniformly distributed load whose intensity varies with bridge length.
Type of material: Journal Article
Publisher: American Society of Civil Engineers
Copyright (published version): 2014 American Society of Civil Engineers
Keywords: Bridges;Traffic;Loads;Highway bridges;Trucks
DOI: 10.1061/(ASCE)BE.1943-5592.0000729
Language: en
Status of Item: Peer reviewed
Appears in Collections:Civil Engineering Research Collection

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