In this paper the parametric study is carried out to investigate the effect of number of cells in optimal cost of the non-prismatic reinforced concrete (RC) box girder bridges. The variables are geometry of cross section, tapered length, concrete strength and reinforcement of the box girders and slabs that are obtained using ECBO metaheuristic algorithm. The design is based on AASHTO standard s...

ABSTRACT: Bridges are structures built to overcome obstacles and allow continuity of transport routes. In the search for efficient construction systems, steel-concrete composite structures, especially box girder bridges, emerged. The American AASHTO European EN 1994-2-2 standards present design procedures this type bridge, but there still doubts about which portion concrete slab contributes eac...

Minat pada material komposit telah meningkat secara signifikan karena rasio kekuatan terhadap beratnya yang tinggi. Perencanaan struktur menggunakan dasar FRP belum popular di Indonesia, penggunaannya masih didominasi untuk perkuatan elemen struktur. Kajian ini bertujuan memberikan gambaran desain profil hipotesis persegi berongga dengan dimensi 150.130.10 jembatan bentang tunggal variasi panja...

Rigid pavements are often preferred to flexible types due their higher durability and ease of maintenance also reduce early road failure increase its longevity. This study redesigned a deteriorated segment Oke-Omi pavement as rigid pavement. The thickness was derived using the American Association State Highway Transportation Officials (AASHTO) design method. A programme spreadsheet developed f...

Abstract Bangladesh is connected through bridges and many of them are experiencing damages due to the aging concrete, weathering effect, or excessive loading. Repair retrofitting those becoming inevitable make operational. In this study, a concrete bridge have been investigated non‐destructive tests numerical methods. A repair strategy for damaged girders has developed using epoxy injection, sh...

A range of stabilisers for poor quality subgrade soils have been developed to promote road constructions. Many them are becoming more popular depending on their effectiveness. The purpose behind this research is identify the relative efficacy many physical and chemical stabilisation techniques enhancing properties three types local Iraqi soils. comparison samples based CBR tests. AASHTO (1993) ...

In order to implement MEPDG hierarchical inputs for unbound and subgrade soil, a database containing subgrade M R , index properties, standard proctor, and laboratory M R for 140 undisturbed roadbed soil samples from six different districts in Indiana was created. The M R data were categorized in accordance with the AASHTO soil classifications and divided into several groups. Based on each grou...