Transfer Length of Fully Bonded and Partially Bonded Prestressing Strands by Finite Element Method

摘要

The objective of this study is to determine the transfer length of fully bonded and partially bonded prestressing strands inpretensioned I-shaped concrete beams by using 3D nonlinear finite element method. Location, bonding condition and percentageof debonding of prestressing strands, dimensions of prestressed concrete beam and material properties were obtainedfrom an experimental study performed at Texas Tech University, and 3D nonlinear FE model was created based on theseparameters. SOLID65, SOLID45, LINK8 and CONTA174 finite elements in ANSYS software were used to model shorttermand long-term transfer lengths of prestressed concrete beams. Results showed that 3D nonlinear FE model capturedactual strain behavior obtained experimentally. Also, transfer lengths obtained by 3D nonlinear FE model were very closeto transfer lengths obtained by experimental study compared to current codes and proposed equations.