Analytical model for torsional strength of prestressed concrete box-girder with corrugated steel webs
Received:October 14, 2011  Revised:February 26, 2012
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DOI:10.7511/jslx201301023
KeyWord:corrugated steel Webs  torsional strength  pure torsion  fixed-angle softened truss model  torque-twist curve
           
AuthorInstitution
丁勇 解放军理工大学 野战工程学院,南京
江克斌 解放军理工大学 野战工程学院,南京
周寅智 解放军理工大学 野战工程学院,南京
杨建奎 解放军理工大学 野战工程学院,南京
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Abstract:
      An analytical model for torsional strength of prestressed concrete box-girder with corrugated steel webs under pure torsion was deduced based on torsion theory and Fixed-Angle Softened Truss Model.Either the shear flow remains constant or the shear strain stays equal between the web and flange depends on the state of the corrugated steel web is in unyielding or yielding when the hybrid box-girder is in ultimate state.The effect of locations of prestressed tendons to torsional strength of the hybrid box-girder was also taken into consideration.The analytical model proposed in this paper was validated by four specimens subjected to cyclic pure torque.The results show that not only the torsional strength but also the torque-twist curve can be obtained through the analytical model developed in this paper.