Improved LRFD/LRFR specifications for permit and fatigue load truck.

Details

• Corporate Creators:
  CTC & Associates LLC
• Subject/TRT Terms:
  • Bridges
  • Design and construction
  • Research
  • Testing
• Resource Type:
  Tech Report
• Geographical Coverage:
  California
• Corporate Publisher:
  California. Department of Transportation
• Abstract:
  Bridge design and evaluation are moving toward the American Association of State Highway and Transportation ; Officials (AASHTO) load and resistance factor design/load and resistance factor rating (LRFD/LRFR) ; specifications using calibrated truck load models and associated load factors. Current code has load factors ; determined by national data, some of which is quite old and doesn’t reflect current traffic and load patterns. ; Additionally, loads vary greatly from site to site across the country, and California is unique in many aspects of the ; distribution of truck loading on its highway systems. ; Caltrans is embarking on a project to produce a revised permit vehicle and load factors for LRFD/LRFR based on ; California weigh-in-motion (WIM) data and permit routing policies. To aid in this effort, we identified and reviewed ; research reports from national and state sources in which state-of-the-art WIM data were applied to bridge design ; and evaluation, and were used in calibrating reliability-based load and resistance factors. We looked particularly for ; states that have gone through similar processes with special interest in the incorporation of side-by-side occurrences ; of truck traffic and detailed calibrations of the load factors.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27698/dot_27698_DS1.pdf
• File Type:
  [PDF - 2.16 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:86095c4678abb40b231efe6752cc008ee1e94777fcd90b59a9919a6b46902fab