Modulus 4.0 User’s Manual

Details

• Creators:
  Scullion, Tom ; Michalak, Chester H.
• Corporate Creators:
  Texas Transportation Institute. Texas A&M University
• Corporate Contributors:
  Texas State Department of Highways and Public Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Calculation Data Collection Elasticity (Mechanics) Falling Weight Deflectometers Manuals Modulus Nonlinear Systems
• Publication/ Report Number:
  FHWA/TX-91/1123-4
• Resource Type:
  Manual
• Geographical Coverage:
  United States ; Texas
• Edition:
  Final: September 1988 - September 1990
• Corporate Publisher:
  Texas Transportation Institute. Texas A&M University
• Abstract:
  The MODULUS program, a modulus back calculation system described in this report, has been developed by the Texas Transportation Institute for the Texas Department of Highways and Public Transportation. See TTI Research Reports 1123-1 and 1123-2 for background and technical details. This system is intended to be used when analyzing data collected with only the Falling Weight Deflectometer. The following enhancements have been made in this version of the software: 1) Automatic calculation of a depth to a stiff layer (H4}, which can be overwritten by the user. 2) Automatic calculation of weighting factors for each sensor. 3) Detection of non-linearity in the subgrade, and automatic selection of the optimum numbers of sensors to use in the back calculation process. 4) The use of the corps of Engineers WESS linear elastic program which is considerably faster than existing programs and has no copyright restrictions. 5) Inclusion of a routine to permit manual input of deflection bowl data. One minor restriction on this version of MODULUS is the four of the deflection sensors must be located at offsets of 0, 12, 24, 36 inches from the center of the load plate. It does not matter which four; for example, other sensors could be included at eight and 18 inches. The MODULUS system has the three following subsystems: Subsystem 1 Data Input, Subsystem 2 MODULUS Back calculation, and Subsystem 3 Plot Deflection.
• Format:
  PDF
• Funding:
  2-18-87-1123
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0bc25c394ff7f1faaa4b9f5fa8246e3495d6111c4fd2e7348399a0449876b31578fac94b5f8553624510221284f722edb3a5a324f330c9ae25ae81b9fed99396
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/86239/dot_86239_DS1.pdf
• File Type:
  [PDF - 1.29 MB ]