An investigation of the variables affecting the transfer length of prestressed concrete members

The transfer length of pretensioned/prestressed concrete members is a function of several variables. This study is an attempt to establish relationships between these variables and the transfer length. Reviews of the existing studies on transfer and development length are also included.

The influence of strand diameter, strand stress, surface condition of the strand, initial end slip of the strand, concrete strength, and concrete consolidation around the strand was investigated. Relationships were then developed and compared with prediction equations from previous research.

The major contributing factors affecting transfer length were found to be strand diameter, strand stress, and surface condition of the strand.