The application of prestressed concrete technology in civil structures is relatively recent. Therefore, the existing prestressed concrete members in such structure are still relatively young, and the corrosion and the concrete deterioration problems associated with this type of concrete members have became clearly evident only in the early 1980s. Damage during service, frequently appearing afte...

This paper deals with the economic optimization of prestressed concrete precast pedestrian bridges typically used in public works construction. These bridges are made of a precast concrete beam that integrates an upper reinforced concrete slab for the pedestrian traffic. The beam has a U-shape cross-section. Typical span lengths range from 20 to 40 m and the width ranges from 3.00 to 6.00 m. Th...

In the impact-echo method, the presence and the locations of defects in concrete are estimated from identifying peak frequencies in the frequency spectra, which are responsible for the resonance due to time-of-flight from the defects. In practical applications, however, spectra obtained include so many peak frequencies that it is fairly difficult to identify the defects correctly. SIBIE (Stack ...

This article presents a damage detection method for prestressed reinforced concrete (PRC) elements based on free vibration tests and nonlinear damping identification. Integrated static and dynamic experiments were carried out on three precast PRC beam specimens. The static loading induced different levels of damage to the beams. At each damage level, impulsive loading was applied to the beams a...

Prestressed structures are commonly used all over the world. They might be subjected to degradation, such as corrosion of prestressing steel. This can influence resistance these and induce early failure. Hence, prediction level is important in assessment existing prestressed structures. For this purpose, process accompanying influences on structure should modeled. reinforced concrete (RC) struc...

The National Bridge Inventory (NBI) includes more than 600,000 bridges within the United States of Prestressed concrete girder bridges represent one of the most widely used bridge systems. The majority of these girder bridges were constructed using 0.5 and 0.6 inch diameter strands. The main impediments to using larger strand diameters are: 1) bed capacities, 2) lack of structural knowledge reg...

Railway Engineering Institute, China Academy of Railway Sciences, Beijing, China, Birmingham Centre for Railway Research and Education, School of Civil Engineering, The University of Birmingham, Edgbaston, United Kingdom, Department of Civil Engineering, Riga Technical University, Riga, Latvia, Department of Civil Engineering, School of Engineering, The University of Birmingham, Birmingham, Uni...