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The purpose of this study was to determine the effect of variations in overlap length and stirrup spacing of Apus bamboo on (1) the flexural capacity, (2) deflection, (3) crack behavior of reinforced concrete beams. The design of this study was experimental, and the data obtained from the test results were described. The parameters measured in this...
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Z 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. Anahtar Kelimeler: Tekerlek ve aks konfigürasyonu, gerilme ve birim şekil değiştirme, mekanistik-ampirik tasarım. 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.
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.
