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RISS 인기검색어
- 검색키워드
- 저자 : D.M. Cotsovos (검색결과 2 건)
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Numerical investigation of RC structural walls subjected to cyclic loading
D.M. Cotsovos,M.N. Pavlovic 한국계산역학회 2005 Computers and Concrete, An International Journal Vol.2 No.3
This work is based on a nonlinear finite-element model with proven capacity for yieldingrealistic predictions of the response of reinforced-concrete structures under static monotonically-increasing loading. In it, the material description relies essentially on the two key properties of triaxiality and brittleness and, thus, is simpler than those of most other material models in use. In this article, the finiteelement program is successfully used in investigating the behaviour of a series of RC walls under static cyclic loading. This type of loading offers a more strenuous test of the validity of the proposed program since cracks continuously form and close during each load cycle. Such a test is considered to be essentialbefore attempting to use the program for the analysis of concrete structures under seismic excitation inorder to ensure that the solution procedure adopted is numerically stable and can accurately predict thebehaviour of RC structures under such earthquake-loading conditions. This is achieved through acomparative study between the numerical predictions obtained presently from the program and availableexperimental data.
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Michael D. Kotsovos,Demetrios M. Cotsovos,Milija N. Pavlovic 사단법인 한국계산역학회 2008 Computers and Concrete, An International Journal Vol.5 No.3
The present article summarises the fundamental characteristics of concrete behaviour which underlie the formulation of an engineering finite element model capable of realistically predicting the behaviour of (plain or reinforced) concrete structural forms in a wide range of problems ranging from static to impact loading without the need of any kind of re-calibration. The already published evidence supporting the proposed formulation is complemented by four additional typical case studies presented herein; for each case, a comparative study is carried out between numerical predictions and the experimental data which reveals good agreement. Such evidence validates the material characteristics upon which the FE model’s formulation is based and provides an alternative explanation regarding the behaviour of structural concrete and how it should be modelled which contradicts the presently (widely) accepted assumptions adopted in the majority of FE models used to predict the behaviour of concrete.
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