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Abstract

Determining the Critical Tire and Axle Configuration for Flexible Pavements Based on Mechanistic Analysis While the tire contact pressure and contact surface area are important concerns in pavement performance, the number of contact points per vehicle and their spacing are also critical. In this study axle loads from field measurements, heavy vehicle tire, and axle configurations were modeled by utilizing a 3D dynamic finite element. The most critical axle and tire types have been determined based on the vertical and horizontal stress and strain values. Single axle and single super tire were found to be the most critical tire and axle configuration in terms of rutting and fatigue damages

Keywords

• Tire and axle configurations, stress, strain, mechanistic-empirical design

Esnek Üstyapılarda Kritik Tekerlek ve Aks Konfigürasyonların Mekanistik Analizlere Göre Tespit Edilmesi

Abstract

Karayolu performanslarında tekerlek basıncı ve temas yüzey alanı ne kadar önemliyse, tekerlek temas nokta sayısı ve aralıkları da o kadar önem taşımaktadır. Bu çalışmada, arazide ağır taşıtlardan elde edilen veriler ışığında, ağır taşıtların tekerlek ve aks konfigürasyonları 3 boyutlu olarak sonlu elemanlar (Ls-Dyna) yöntemi ile modellenmiş ve dinamik analizi yapılmıştır. Tekerlek ve aks tiplerinin yol tabakalarında neden oldukları düşey ve yatay gerilme ve deformasyonların büyüklüklerine göre en kritik aks ve tekerlek tipleri tespit edilmiştir. Tekerlek izi hasarı ve yorulma çatlakları açısından en çok hasar verebilecek tekerleğin geniş yüzeyli ve tekil tekerleklerin olduğu, aks dingiller içerisinde ise motris (çekici) tek dingilin olduğu tespit edilmiştir

Keywords

• Tekerlek ve aks konfigürasyonu, gerilme ve birim şekil değiştirme, mekanistik-ampirik tasarım

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