The rideability of a deflected bridge approach slab (LTRC project 02-2GT continuation : phase II) : [tech summary].

Details

• Creators:
  Martinez, Mark ; Morvant, Mark
• Corporate Creators:
  Louisiana Transportation Research Center
• Subject/TRT Terms:
  Bridge Approaches Indexing Pavement Distress Ride Quality Roughness
• Publication/ Report Number:
  SIO No. 30000160 ; LTRC Project No. 11-3P
• Resource Type:
  Brief
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  DOTD has made attempts to use the standard international roughness index (IRI) to index bridge bumps. However, it was
  
  discovered that IRI has problems indexing localized roughness. A research eff ort was undertaken to investigate if there might
  
  be a means to overcome the aforementioned problem. As a result of this eff ort, completed in 2009, DOTD was able to develop
  
  the Posted-Speed Localized Roughness Index (LRIPS), which attempted to overcome the problems by returning to a response-type road roughness measuring systems (RTRRMS) approach. It was then discovered that the LRIPS could isolate the positions
  
  of localized roughness phenomena. However, with it being an RTRRMS, it did suff er from “transportability” and “suspension
  
  degradation” problems, which prevented it from being a tool adequate for measuring distress magnitude. The profi ling
  
  community had also recognized that the standard IRI has problems coping with localized roughness. Through their eff orts, the
  
  so-called 25-ft. moving base-length method of evaluating localized roughness (IRI25-ft) was developed. Louisiana’s attempts to
  
  use the IRI25-ft approach met with some diffi culty, however. While the IRI25-ft methodology
  
  indexed bumps adequately, DOTD had diffi culty using it to locate the position of bumps on
  
  the pavement. This research sets details as to how the IRI25-ft method and the LRIPS method
  
  can be used in a complementary fashion to overcome the limitations of each.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:bbacc6b061716fb1a2425fa68f1e10a88938fa672095c8152368f6a3e5d4a114
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28359/dot_28359_DS1.pdf
• File Type:
  [PDF - 126.44 KB ]