نتایج جستجو برای: reinforced concrete bridges
تعداد نتایج: 125606 فیلتر نتایج به سال:
In the last decades, modern technological and research developments of textile-reinforced concrete have led to extensive applications in building civil engineering structures all over world. Examples can be found retrofitting existing buildings, facade slabs or bridges. Despite its potential, widespread use remains still limited. This is partly explained by lack a consistent design framework si...
a reinforced concrete member in which the total span or shear span is especially small in relation to its depth is called a deep beam. in this study, a new approach based on the adaptive neural fuzzy inference system (anfis) is used to predict the shear strength of reinforced concrete (rc) deep beams. a constitutive relationship was obtained correlating the ultimate load with seven mechanical a...
امروزه خطر انفجار بر روی سازه ها به عنوان یک حادثه تصادفی یا عمل خرابکارانه رو به افزایش است. یکی از روش های ایمن سازی سازه ها در برابر بار انفجار استفاده از سازه های محافظ می باشد. دیوارهای محافظ بتن مسلح یکی از سازه های کارامد و متداول در مقابله با بارهای انفجاری می باشند. به دلیل هزینه بر و طاقت فرسا بودن تحقیقات آزمایشگاهی پدیده انفجار، مدل سازی های نرم افزاری و عددی یکی از روش های مطلوب و ...
there is a worldwide interest in using fibers of different types in concrete mixtures. in this regard, as the use of pet fibers has gradually increased during the last decade, this study aims to investigate the effects of pet fibers on the mechanical properties of hardened concrete and the workability of fresh concrete. to this end, different contents of pet fibers (pc= %0, %0.5, %1 and %1.5) a...
: in the present paper, lessons are learnt from ant society so that humankind can optimize his engineering issues. as an example of such issues, a reinforced concrete retaining wall for which the application of optimization can reduce the costs involved is considered. traditional design procedure for reinforced concrete retaining walls is unable to design an optimized wall unless a large trial ...
In recent years, rehabilitation has been the subject of extensive research due to increased spending on building work and repair of built works. In all cases, it is absolutely essential to carry out methods of strengthening or repair of structural elements, and that following an inspection analysis and methodology of a correct diagnosis. The reinforced concrete columns are important elements in...
The development of structural health monitoring (SHM) technology has evolved for over fifteen years in Hong Kong since the implementation of the “Wind And Structural Health Monitoring System (WASHMS)” on the suspension Tsing Ma Bridge in 1997. Five cable-supported bridges in Hong Kong, namely the Tsing Ma (suspension) Bridge, the Kap Shui Mun (cable-stayed) Bridge, the Ting Kau (cable-stayed) B...
Epoxy coated reinforcement (ECR) has been used in Florida from the 1970s to 1990s but has been discontinued due to the observation of severe corrosion in some ECR bridges after short service times. Corrosion projections have been made in earlier investigations based on corrosion initiation and propagation concepts but did not consider the presence of structural cracks. The current research in p...
Dual systems of steel moment frame and reinforced concrete shear wall have combined the advantages of steel frames and reinforced concrete shear wall. These walls have increased the lateral stiffness of steel frames and have reduced seismic demands on steel frames thus providing opportunities to use such system. In this research intermediate dual system of steel moment frame was chosen with int...
The rigorous modeling of traveling loads on bridges in a dynamic regime is not an easy task as the load contributes to structural system with its mass and damping. In this paper, simplified approach for proposed. main simplification consists neglecting mass. validity proposed checked sensitivity analysis considering few realistic case-study bridges. ranges velocity traveling-force/bridge-weight...
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