APPLICATION OF FUZZY LOGIC TO LIFE-CYCLE COST ANALYSIS OF HIGHWAY PAVEMENTS

Abstract

   The determination of the optimal highway pavement alternative is the result of a systematic decision-making process. Life-cycle cost analysis is a suitable tool to ensure decision-making. It is commonly used by global transportation authorities in selecting a best-fit highway pavement alternative. However, the high data requirement of the analysis is a significant disadvantage. This triggers the subjectivity in decision-making. Therefore, a new method is needed to overcome this problem. In this study, fuzzy logic technique was used because of its popularity in successful solutions. Vertex and DSW methods, which are fuzzy logic extension principles, were applied in life-cycle cost analysis of highway pavements. The application steps of the methods are given in detail in the study. As a result, the applicability of fuzzy logic in life-cycle cost analysis of highway pavements has been revealed.

Keywords

• Fuzzy logic,DSW algorithm,Highway pavements,Life-cycle cost analysis,Vertex method

KARAYOLU ÜSTYAPILARININ ÖMÜR DÖNGÜ MALİYET ANALİZİNDE BULANIK MANTIĞIN UYGULANMASI

Öz

   Karayolu üstyapı alternatifleri içinden en uygun olanın belirlenmesi sistematik bir karar verme sürecinin sonucudur. Ömür döngü maliyet analizi karar vermeyi temin eden uygun bir araçtır. Bu araç, karayolu üstyapı alternatiflerinin belirlenmesinde ulaştırma otoriteleri tarafından yaygın olarak kullanılmaktadır. Ancak analizin yüksek veri gereksinimi, doğru karar vermenin temin edilmesinde önemli bir dezavantaj oluşturmaktadır. Bu durum karar vericileri, bilimsel yaklaşımlardan uzaklaştırarak öznel kararlar almaya zorlamaktadır. Söz konusu sorunun giderilmesi için yeni bir yönteme ihtiyaç duyulmaktadır. Mühendislik uygulamalarındaki başarılı çözümlemelerinden dolayı bu çalışmada bulanık mantık tekniği kullanılmıştır. Problemin çözümüne ilişkin bulanık mantık uzantı prensiplerinden Vertex ve DSW yöntemi, karayolu üstyapıları ömür döngü maliyet analizinde uygulanmıştır. Çalışmada yöntemlerin uygulama adımları ayrıntılı olarak verilmiştir. Sonuç olarak bulanık mantığın karayolu üstyapıları karar verme süreçlerinden biri olan ömür döngü maliyet analizinde kullanılabilirliği ortaya konulmuştur.

Anahtar Kelimeler

• Bulanık mantık,DSW algoritması,Karayolu üstyapıları,Ömür döngü maliyet analizi,Vertex yöntemi

Kaynakça

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