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Discussion of "2-D Finite Element analysis of Massive RC Structures"

Ottosen, Niels Saabye LU (1982) In Journal of the Structural Division, ASCE 108(8). p.1874-1893
Abstract
Nonlinear analysis of concrete structures using finite elements is discussed. The applications include a thick-walled top-closure for a pressure vessel as well as the delicate problems of beams failing in shear. The top-closure analysis evaluates the effect of two different failure criteria and modeling of a realistic post-failure behavior is demonstrated to be mandatory for accurate structural predictions. For shear beams it is shown that the primary cause of failure is strain softening adjacent to the load point. This softening causes a strain localization which in turn results in a tendency toward diagonal cracking. Stirrups prevent this tendency and a shear-compression failure follows. Otherwise, a diagonal tension failure results.... (More)
Nonlinear analysis of concrete structures using finite elements is discussed. The applications include a thick-walled top-closure for a pressure vessel as well as the delicate problems of beams failing in shear. The top-closure analysis evaluates the effect of two different failure criteria and modeling of a realistic post-failure behavior is demonstrated to be mandatory for accurate structural predictions. For shear beams it is shown that the primary cause of failure is strain softening adjacent to the load point. This softening causes a strain localization which in turn results in a tendency toward diagonal cracking. Stirrups prevent this tendency and a shear-compression failure follows. Otherwise, a diagonal tension failure results. This again highlights modeling of strain softening. The influence of the shear retention factor is found to be relatively moderate. Variation of the uniaxial tensile strength influences the results insignificantly. Modeling of secondary cracks is found to be essential. Finally, it is shown that dowel action must be treated through the bending of the bars and not through their shear deformation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Structural Division, ASCE
volume
108
issue
8
pages
1874 - 1893
publisher
American Society of Civil Engineers (ASCE)
external identifiers
  • Scopus:0020166645
language
English
LU publication?
yes
id
9bfbdd28-a2eb-4be1-9d4d-caee024d88fe (old id 930623)
alternative location
http://ascelibrary.aip.org/
date added to LUP
2010-09-17 14:14:14
date last changed
2016-10-13 04:55:51
@misc{9bfbdd28-a2eb-4be1-9d4d-caee024d88fe,
  abstract     = {Nonlinear analysis of concrete structures using finite elements is discussed. The applications include a thick-walled top-closure for a pressure vessel as well as the delicate problems of beams failing in shear. The top-closure analysis evaluates the effect of two different failure criteria and modeling of a realistic post-failure behavior is demonstrated to be mandatory for accurate structural predictions. For shear beams it is shown that the primary cause of failure is strain softening adjacent to the load point. This softening causes a strain localization which in turn results in a tendency toward diagonal cracking. Stirrups prevent this tendency and a shear-compression failure follows. Otherwise, a diagonal tension failure results. This again highlights modeling of strain softening. The influence of the shear retention factor is found to be relatively moderate. Variation of the uniaxial tensile strength influences the results insignificantly. Modeling of secondary cracks is found to be essential. Finally, it is shown that dowel action must be treated through the bending of the bars and not through their shear deformation.},
  author       = {Ottosen, Niels Saabye},
  language     = {eng},
  number       = {8},
  pages        = {1874--1893},
  publisher    = {ARRAY(0xa9d88a0)},
  series       = {Journal of the Structural Division, ASCE},
  title        = {Discussion of "2-D Finite Element analysis of Massive RC Structures"},
  volume       = {108},
  year         = {1982},
}