Rideability of a Deflected Bridge Approach Slab (LTRC Project 02-2GT Continuation: Phase II), Tech Summary.

摘要

This research was initiated in order to determine the means by which the IRI25-ft and LRIPS localized roughness testing methodologies might be employed in combination so as to take advantage of their respective strengths and to overcome their respective weaknesses in localized roughness testing. Forty bridges along I-10 located across six parishes, comprising fi ve control sections, were analyzed using DOTDs high speed laser profi ler (HSLP). The data collected were analyzed using both the IRI25-ft and LRIPS methodologies. A series of synthesized profi les were then developed in order to parametrically investigate IRI25-ft and LRIPS reaction to special profi le cases not available in the fi eld so as to better refi ne and understand the combined index.