Probabilistic analysis algorithm for UA slope software program.

Details

• Creators:
  Liang, Robert Y. ; Li, Lin
• Corporate Creators:
  University of Akron. Department of Civil Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Algorithms Computer Programs Monte Carlo Method Probability Slopes Software
• Publication/ Report Number:
  FHWA/OH-2013/14
• Resource Type:
  Tech Report
• Geographical Coverage:
  Ohio
• Corporate Publisher:
  Ohio. Department of Transportation. Office of Statewide Planning and Research
• Abstract:
  A reliability-based computational algorithm for using a single row and equally spaced drilled shafts to
  
  stabilize an unstable slope has been developed in this research. The Monte-Carlo simulation (MCS)
  
  technique was used in the previously developed deterministic computational program, in which the
  
  limiting equilibrium method of slices was modified to incorporate the arching effects of the drilled shafts
  
  in a slope. Uncertainties of soil parameters in the slope were considered by statistical descriptors,
  
  including mean, coefficient of variance (c.o.v.), and distribution function. Model errors of the semiempirical predictive equation for the load transfer factor for characterizing the soil arching effects were
  
  considered by statistics of bias. A PC-based research grade program, UA Slope 3.0, was coded to allow
  
  for analysis of probability of failure and reliability index of a shaft/slope system. The illustrative example
  
  demonstrated that a single value of factor of safety chosen in the deterministic approach may not yield
  
  the desired level of reliability as uncertainties of soil parameters and model errors cannot be accounted
  
  for systematically. As an extension of this research, importance sampling technique (IST) on drilled
  
  shaft/slope system has been proposed to demonstrate its high efficiency, in which the importance
  
  function and design point are determined for the ordinary method of slices (OMS) with the accompanying
  
  load transfer factor. In addition, the design method of using multiple rows of drilled shaft was developed
  
  to stabilize a large slope, in which the design and optimization criteria were proposed to reach the target
  
  safety and the constructability while meeting the service limit requirement.
  
  
• Format:
  PDF
• Funding:
  SJN 134710
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0ff1cb54b38526fec7c104cf168cf644bdb5f352faf2382a572770261d3b10009617d6c7ad89f171a43461e157d840d6b44498d3929b946eaba05947ef3309d8
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26798/dot_26798_DS1.pdf
• File Type:
  [PDF - 2.65 MB ]