VI. RESEARCH WORK DONE IN ACADEMIC INSTITUTIONS RELATED TO THESIS WORK

A. HIGHWAY PLANNING, MANAGEMENT, PERFORMANCE EVALUATION AND INSTRUMENTATION
6. Effect of Varying Calibration Factor on IRR, VOC
Date of Start

January 2006
School of Planning and Architecture, New Delhi (R)

 

Objectives

(i) To review the literature relating to the pavement performance models in general and effect of cracking, raveling and rutting on life cycle cost of pavements

(ii) To study operation of HDM-4 model and identify the various factors that require calibration for local conditions

(iii) To calibrate the sensitive parameters of HDM model that has maximum bearing on the pavement performance and life cycle cost and to calibrate the sensitive parameters w.r.t, pavement deterioration model, so as to achieve simulated values of deterioration

(iv) To identify and prioritize calibration parameters needed as part of future research for prevailing pavements and traffic conditions

 
Methodology
The project started with collection of initial input data. Then the pavement strength parameters and the amount of change in each surfacing distress mode during the analysis year were computed. Various checks were done for total damaged/undamaged carriageway surface area, and the amount of each surface area mode, surfacing distress mode and average value for the year, change in deformation stress were determined. Calibration was done taking default values for distress, i.e. 1, and the corresponding values for VOC and IRR were computed.
 
Findings and Conclusions
(i) Under default conditions two interventions are required for all alternatives

(ii) For calibrated model four interventions required for R-BC and R-SDBC and 3 each for four stages.

(iii) Considering the IRR to be maximum for R-SDBC out of all the alternatives is chosen as the PMMS criteria, at the intervention period of 2004, 2009,2013 and 2017

(iv) By changing the cracking calibration factor of 0.5 a variation of 0.13% - 2% in the RUC is observed for a stretch of 3 kms.