Comparison of dynamic methods of road pavement evenness evaluation

Martin Decky

doi:10.26552/com.c.1999.2.22-32

Abstract

The paper presents the review of dynamic methods of road pavement evenness evaluation used in the Slovak Republic. The principles of assessment by parameters C and IRI (International Roughness Index) are detailed here. The measuring set called the Single-Wheel Vehicle of the University of Ĺ˝ilina (JP VĹ DS), which appreciates parameter C has been designed on the DMS (double-mass measuring set) dynamic principle. The design of this system pavement assessment in term of longitudinal unevenness was realised for a consideration stationary random process. The conclusion of our paper is devoted to the comparison of longitudinal unevenness evaluated by our equipment, measuring vehicle "Profilograph" (IRI) and original parameter IRI.

Highlights

Meracie zariadenie JP VŠDS, ktoré hodnotí parameter C, bolo skonštruované na dynamickom princípe DMS
The measuring set called the Single-Wheel Vehicle of the University of Žilina (JP VŠDS), which appreciates parameter C has been designed on the DMS dynamic principle
Analýzu nerovností cestných vozoviek možno považovať za substanciálnu úlohu v oblasti inžinierskeho diagnostikovania cestnej siete, a preto kvantifikácia pozdĺžnych nerovností cestných vozoviek tvorí fundament úspešnej implementácie systémov hospodárenia s vozovkami

Summary

Analytical description of pavement longitudinal unevenness

Analytické vyjadrenie priestorovej nerovnosti cestnej vozovky je problém značne zložitý. Korelačnú funkciu Kh(␭) môžeme v lineárnej doméne pre tento typ procesov vyjadriť vo forme amplitude These processes can be considered random from the point of view of mathematical statistics. Pri riešení dynamických úloh spojených s pohybom vozidla po nerovnostiach vozovky je výhodnejšie používať výkonovú spektrálnu hustotu Sh(⍀), ktorá je s KF viazaná VienerChinčinovým vzťahom: For our purpose of unevenness assessment, it is more appropriate to use power spectral density Sh(⍀), which we can express from correlation function by means of the Viener-Chinčin equation: 23 KOMUNIKÁCIE / COMMUNICATIONS 2 / 9 9 G. kde: ⍀ - držková kruhová frekvencia [rad.m-1], where: ⍀ - length circular frequency [rad.m-1], 2и␲. The design of a system pavement assessment from the point of view of longitudinal unevenness was realised for a consideration stationary random process and principle

Assessment of unevenness measurements by parameter C

International Roughness Index - IRI

Porovnávacie merania zariadení Profilograph a JP VŠDS

Conclusions