期刊
ENGINEERING FRACTURE MECHANICS
卷 75, 期 3-4, 页码 590-614出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2007.03.027
关键词
reinforced concrete; generalized saw-tooth model; nonlinear softening
类别
The sequentially linear analysis is a robust alternative to nonlinear finite element analysis of structures when bifurcation, snap-back or divergence problems arise. The load-displacement response is captured by a series of linear analyses as a sequence of 'events'. Every 'event' is a scaled critical state corresponding to the reaching of some peak of some saw-tooth for some softening element. Now, the approach is extended with a rippled saw-tooth curve which applies to any stress-strain diagram, including compression nonlinearity and yielding of reinforcement. Several RC structural examples demonstrate that both sharp snap-backs as well as ductile failures can be handled correctly. (C) 2007 Elsevier Ltd. All rights reserved.
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