Numerical and experimental investigations of single span prestressed concrete beams

摘要

Modern structural engineering tends to progress towards more economical structures through gradually improved methods of design and the use of higher strength materials. Such developments are particularly important in the field of reinforced concrete; the limiting features of ordinary reinforced concrete have been largely overcome by the development of prestressed concrete. The post-tensioning technique has been commonly used in the construction field because it facilitate the analysis and design of structures widely applicable for many type structures. In this paper the displacement behavior of single span prestressed concrete beams have been studied numerically and experimentally. Six beams were cast and experimented. The experimental results were compared with finite element method results. Using these data, friction and anchorage losses have been also calculated. It is observed that friction loss is almost constant but anchorage loss may vary considerably. Hence anchorage loss should be minimised for effective application of prestressing force.