Live-Load Stresses in a Straight Box-Girder Bridge.

摘要

Current AASHO design criteria governing transverse distribution of live loads in steel box-grider bridges were developed as the result of numerous analytical and experimental studies. However,since these studies were confined to right simply supported structures,application of these design relationships to other structural configurations is questionable. Consequently, a field testing program was initiated to verify the applicability of these relationships to a two-span continuous twin box-girder bridge with skewed end supports. Experimental transverse influence lines for stress and vertical deflection were developed and employed in determining live-load distribution factors for both the positive and the negative bending moment regions. (Modified author abstract)