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Title: Cracking in Prestressed Concrete Structures

Author(s): B. O. Aalami and F. G. Barth

Publication: Symposium Paper

Volume: 113


Appears on pages(s): 157-202

Keywords: beams (supports); concrete slabs; cracking (fracturing); deflection; evaluation; post-tensioning; prestressed concrete; renovating; repairs; serviceability; strength; unbonded prestressing; Structural Research

Date: 4/1/1989

Based on extensive observations and a survey of the performance of unbonded post-tensioned buildings, paper presents a categorization of the common cracks in beams and slabs, and the principal causes of crack formation due to restraining effects of supporting structures are discussed in detail. Current methods of crack formation control are also presented and evaluated, and the consequences of cracks on serviceability and strength of post-tensioned buildings are reviewed. In addition, recommendations are made for crack mitigation and maintenance of buildings that are post-tensioned with unbonded tendons.


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