Punching Shear in Waffle Slabs, Analysis of Experimental Behavior


Abstract eng:
Eleven full-sized posttensioned waffle slab-column connections subjected to axial load and flexural moment were tested to study their mode of failure, strength and ductility. The test variables are: 1) provision of stirrups or stud shear reinforcement; 2) spacing between stirrups or shear studs; 3) slab thickness; 4) size of the solid region around the column; and 5) relationship between the applied axial load, Vu, and the punching shear strength of the slab with axial load and without shear reinforcement, VcR. Most tests carried out in this type of connections, according to a bibliographical review, used solid flat slab. In this research, waffle slabs were used, being more used in Mexico than solid slabs because economic reasons. The ductility of the connections was of special interest, since this type of structures are usually considered of low or medium ductility because the punching shear failures are brittle. It has been found that the maximum IDR (interstory drift ratio) reached in structures with flat slabs-columns connections depends on the relation between Vu and VcR, so this was one of the main variables in the research.

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Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
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Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 2220.:
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