IMPACT FACTORS FOR SIMPLE-SPAN HIGHWAY GIRDER BRIDGES. DISCUSSION

A discussion of a paper with the aforementioned title by Chang and Lee, published in this journal (Volume 120, Number 3, March 1994), is presented. Wang and Huang disagree with the authors' conclusion that the impact factors for highway bridges are nearly independent of the bridge span length. The discussers also question the simplicity of the authors' vehicle models and the effects of multivehicle loading in both the transverse and longitudinal directions. No closure is offered by the authors.