Title : DEVELOPMENT AND CONSTRUCTION OF THE IPC (INCREMENTALLY PRESTRESSED CONCRETE) BRIDGE
Authors : Prof. Manyop Han
Publication : 8 - 10, October 2015
Volume : 2
Pages :
Price : 250
Abstract : Prestressed concrete (PSC) I-type girders are widely used in short and medium span bridges. Prestressing in traditional PSC girders is usually applied once at the beginning stage of construction. Magnitude of the prestressing force is limited within allowable stresses at various construction stages. Consequently, for longer span, larger sectional depth is required.In order to achieve more economical PSC girders in terms of a reduced girder depth for a given span or a longer span for a given girder depth, the method of multi-stage prestressing at different loading stages is introduced. Theoretical expressions for stresses at each loading stages are developed and experimental verification is made through two full-scaled flexural tests. From parametric studies and test results, it was observed that the developed girders satisfy the requirement on strength and ductility and can be an economical alternative to other types of PSC girder for long span bridges. The IPC(Incrementally Prestressed Concrete) girder has lots of advantages such as short girder height, light weight, the smallest span to depth ratio, and the cheapest girder of all kinds of bridge girders. It has achieved a commercial success and it is widely used for the construction of bridges.