KONFORLU SÜRÜŞ İÇİN ULUSLARARASI DÜZGÜNSÜZLÜK İNDEKSİ SINIR DEĞERLERİNİN BELİRLENMESİ

Öz

Karayolu üstyapıları, sürüş sırasında yol kullanıcılarına konforu ve güvenliği sağlayan önemli bir bileşendir. Bu nedenle, karayolu işletiminden sorumlu otoritelerce, üstyapıların hizmet düzeylerinin iyi durumda olması oldukça önemsenmektedir. Çalışmada, bitümlü sıcak karışım kaplamalı devlet yollarında, otomobiller için üstyapıların mevcut hizmet düzeyi ile sürüş konforu arasındaki ilişkilerin araştırılması ve ISO 2631 standardında açıklanan konfor kriterlerine göre IRI’nın sınır değerlerinin belirlenmesi amaçlanmıştır. Bu amaçla, şehirlerarası bağlantı sağlayan yaklaşık 80 km uzunluğunda bir devlet yolunda IRI ölçümleri yapılmış ve yol kesimlere ayrılarak değerlendirilmiştir. Aynı yol kesimlerinde, farklı sürüş hızlarında taşıt içerisinde sürücü koltuğu üzerinden düşey doğrultuda titreşim verileri ölçülmüştür. Ölçümler ISO 2631 kodlu standarda göre değerlendirilerek a_wz değerleri bulunmuştur. Değerlendirilen yol kesimine ait ortalama sürüş hızı ve a_wz verileri ile IRI arasında yapay sinir ağı tekniği kullanılarak matematiksel model geliştirilmiştir. Geliştirilen model aracılığıyla ISO standardında belirtilen konfor seviyelerine bağlı olarak farklı sürüş hızları için IRI’nın sınır değerleri belirlenmiştir. Analizler sonucunda, konforlu bir sürüş için hız arttıkça IRI sınır değerlerinin azaldığı tespit edilmiştir.

Anahtar Kelimeler

• IRI,Sürüş Konforu,Asfalt Üstyapı

DETERMINATION OF INTERNATIONAL ROUGHNESS INDEX LIMIT VALUES FOR COMFORTABLE RIDING

Öz

Highway pavements are an important component that provides comfort and safety for road users while riding. Therefore, by the authorities responsible for road operation, it is quite important that the level of service of the pavements is in good condition. In the study, it was aimed to investigate the relationship between the existing serviceability level of the pavements and the ride comfort for passenger cars, and to determine the limit values of IRI according to the comfort criteria described in the ISO 2631 standard. For this purpose, IRI measurements were made on a state road about 80 km long providing intercity connections and the road was divided into sections evaluated. In the same road sections, vibration data were measured in the vertical direction over the driver's seat in the vehicle at different ride speeds. The measurements were evaluated according to the ISO 2631 coded standard and the a_wz values were found. A mathematical model was developed using the artificial neural network method between the average ride speed and a_wz data of the assessed road sections, and the IRI data. By means of the developed model, the limits of IRI have been determined for different ride speeds depending on the comfort levels specified in the ISO standard. As a result of the analyses, it was determined that as the ride speed increases for comfortable riding, the IRI limit values decrease.

Anahtar Kelimeler

• IRI,Ride Comfort,Asphalt Concrete Pavement

Kaynakça

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