Cracking in deep beams owing to shear loading. Part 1: Experimental study and assessment.
2008 (English)In: Magazine of Concrete Research, ISSN 0024-9831, E-ISSN 1751-763X, Vol. 60, no 5, 371-379 p.Article in journal (Refereed) Published
In this paper, laboratory tests to failure of ten large deep beams with I-shaped cross-sections are presented. All beams had the same geometry with a shear span-to-depth ratio of 1.25 but differed in the amount of the vertical and horizontal web reinforcement. The presented results from the measurements consist of load-deformation curves, crack widths and crack patterns and strain distribution near the supports. The ultimate loads for these beams have been calculated with two strut-and-tie models and one truss model. The first strut-and-tie model calculates the tensile contribution of both reinforcement and concrete and takes into account their influence on the principal tensile stress. The second strut-and-tie model is a modification of the first one where the stress distribution along the strut is redefined. The third method is the truss model that is incorporated in a Design Code. The truss model gave the best result for the beams with a higher reinforcement ratio that exhibited in a shear compressive failure. The diagonal tensile failure that occurred in the beams with a small amount of web reinforcement was best captured with the modified strut-and-tie model.
Place, publisher, year, edition, pages
London: Thomas Telford Ltd , 2008. Vol. 60, no 5, 371-379 p.
Beams and girders; Reinforcement; Safety factor; Stress concentration; Struts; Tensile strength; Trusses
IdentifiersURN: urn:nbn:se:kth:diva-10144DOI: 10.1680/macr.2008.60.5.371ISI: 000255437700007ScopusID: 2-s2.0-57849156473OAI: oai:DiVA.org:kth-10144DiVA: diva2:209506
QC 201007302009-03-252009-03-252016-05-18Bibliographically approved