yes / A mechanism analysis based on the upper-bound theorem of concrete plasticity is developed to predict the critical
failure plane and corresponding shear capacity of reinforced concrete dapped-end beams. Failure modes observed in
physical tests of reinforced concrete dapped-end beams are idealised as an assemblage of two moving blocks separated
by a failure surface of displacement discontinuity. The developed mechanism analysis rationally represents the effect of
different parameters on failure modes; as a result, the predicted shear capacity is in good agreement with test results.
On the other hand, empirical equations specified in the Precast/Prestressed Concrete Institute design method and strutand-tie
model based on ACI 318-05 highly underestimate test results. The shear capacity of dapped-end beams predicted
by the mechanism analysis and strut-and-tie model decreases with the increase of shear span-to-full beam depth ratio
when failure occurs along diagonal cracks originating at the bottom corner of the full-depth beam, although the shear
span-to-full beam depth ratio is ignored in the Precast/Prestressed Concrete Institute design method.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/7563 |
| Date | 17 February 2010 |
| Creators | Yang, Keun-Hyeok, Ashour, Ashraf, Lee, J.K. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Article, Accepted Manuscript |
| Rights | © 2011 ICE. Reproduced in accordance with the publisher's self-archiving policy. |
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