Transcription of CHAPTER 4: THE CONSTRUCTION PROCESS OF SEGMENTAL …
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CHAPTER 4: THE CONSTRUCTION PROCESS OF SEGMENTAL …
157 CHAPTER 4: THE CONSTRUCTION PROCESSOF SEGMENTAL BRIDGESThe following CHAPTER 4 presents the important techniques for erection of concrete segmentalbridges. Their characteristics are outlined so that understanding of the specific nature of each ofthese methods can be achieved. Apart from that this CHAPTER deals with the most important issueof CONSTRUCTION loads by distinguishing the various types of CONSTRUCTION loads and showing theirrelation to the erection method used for a specific DEVELOPMENT OF PRESTRESSED SEGMENTAL BRIDGESA pplication of prestressed concrete for bridge CONSTRUCTION was developed by French engineerEug ne Freyssinet, as described in Section , and has spread widely thereafter.
4.1.2 Pre-Tensioning Prestressing basically can be carried out as pre-tensioning and post-tensioning, referring to the time when the prestressing force is imposed with respect to casting. In pre-tensioning the tendons are anchored to e.g. a stiff frame around the casting bed and are prestressed before the concrete is placed.
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