PerRoad is a mechanistic-based procedure for the design of flexible long-life or perpetual pavement structures. The procedure was developed at the National Center for Asphalt Technology (NCAT) at Auburn University (AU) in conjunction with the Asphalt Pavement Alliance (APA), the National Asphalt Pavement Association (NAPA) and State Asphalt Pavement Associations (SAPAs) through the Pavement Economics Committee. The program couples layered elastic analysis with a statistical analysis procedure (Monte Carlo simulation) to estimate stresses and strains within a pavement. Version 4.4 provides design results as percentile responses and as conventional designs with transfer functions. In order to predict strains that would prove detrimental for fatigue cracking or structural rutting, PerRoad requires the following inputs:
- Seasonal pavement moduli and annual coefficient of variation (COV)
- Seasonal resilient moduli of unbound materials and annual COV
- Thickness of bound materials and COV
- Thickness of unbound materials
- Load spectrum for traffic
- Location for pavement response analysis
- Magnitude of limiting pavement responses
- Transfer functions for pavement responses exceeding the user-specified level for accumulating damage
* PerRoad download link provides freeware version of the software.
Stand alone software version of the pavement design portion of the CE CALC website. Runs on the Windows . NET platform. Performs civil engineering calculations for traffic/road geometry, surveying/earthwork, pavement, concrete floors and unit c
ELLEA1 performs real time computation of stresses, strains and displacements in a layered elastic half-space due to two uniformly loaded circular areas applied at the surface
PaveXpress is a free web-based pavement design tool available for use by local agencies, engineers and architects who need a reliable way to quickly determine the necessary pavement thickness for a given section of roadway or project.
Abnormal Load Vehicles, HB Vehicles, BD21 Annex D Vehicles and BD86 STGO Vehicles are analysed as moving loads across a single or multi-span continuous line beam to determine critical bending moments and shear forces.
The modified MEXE analysis to BD 21/01 and BA 16/97 for single span masonry arch with option for axle lift-off.
Calculates bending moments and shear forces for loads on a single span or continuous multi-span beam using the moment distribution method.
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