Abstract
The stress fps in the prestressing steel at nominal flexural strength of partially prestressed concrete unbonded members is investigated using a nonlinear analysis. Many different parameters are explored and a rational analytical model explaining the mechanism of member span-depth ratio and its effect on the predicted fps is presented. The present investigation, supported by experimental observations, shows that the type of load application, the loading pattern in continuous members, the amount of ordinary tension reinforcement and span-depth ratio have a significant effect on fps in addition to the parameter pp!fJ currently adopted in the ACt Code. While the current study supports the recent ACt adoption of member span-depth ratio parameter in computing fps , it shows that its implementation is unwarranted in the present form. Based on an extensive parametric evaluation, recommendations are given and unified design equations for computing fps in both bonded and unbonded members, expressed as a function of familiar design parameters, are proposed. Numerical examples illustrating the use of the proposed prediction equations are provided in Appendix B.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
