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Title: Design Considerations Dictated by Creep and Shrinkage in Prestressed Concrete Frames

Author(s): M. S. Khalil, W. H. Dilger, and A. Ghali

Publication: Symposium Paper

Volume: 76

Issue:

Appears on pages(s): 125-148

Keywords: creep properties; deformation; frames; post-tensioning; prestressed concrete; shrinkage; stresses; structural analysis.

DOI: 10.14359/6788

Date: 10/1/1982

Abstract:
A computer-aided, step-by-step method is presented for the study of time-dependent stresses and deformations of pre-stressed concrete frames. The method is used to investigate the effectiveness of deferring the final connections between column or walls and slabs in building frames and allowing the slabs to slide on the columns during post-tensioning. The joints are then constructed at a later date. A second investigation concentrates on the stresses developed in a cast-in-place, normally-reinforced closure strip cast sometime after post-tensioning of the floors in a long continuous frame. Results obtained for the two examples are evaluated and the possibility of excessive stresses and cracking is discussed.