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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Structural Engineering and Mechanics
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Volume 10, Issue 6 - Dec 2000
Volume 10, Issue 5 - Nov 2000
Volume 10, Issue 4 - Oct 2000
Volume 10, Issue 3 - Sep 2000
Volume 10, Issue 2 - Aug 2000
Volume 10, Issue 1 - Jul 2000
Volume 9, Issue 6 - Jun 2000
Volume 9, Issue 5 - May 2000
Volume 9, Issue 4 - Apr 2000
Volume 9, Issue 3 - Mar 2000
Volume 9, Issue 2 - Feb 2000
Volume 9, Issue 1 - Jan 2000
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Nonlinear analysis and tests of steel-fiber concrete beams in torsion
Karayannis, Chris G. ;
Structural Engineering and Mechanics, volume 9, issue 4, 2000, Pages 323~338
DOI : 10.12989/sem.2000.9.4.323
An analytical approach for the prediction of the behaviour of steel-fiber reinforced concrete beams subjected to torsion is described. The analysis method employs a special stress-strain model with a non-linear post cracking branch for the material behaviour in tension. Predictions of this model for the behaviour of steel-fiber concrete in direct tension are also presented and compared with results from tests conducted for this reason. Further in this work, the validation of the proposed torsional analysis by providing comparisons between experimental curves and analytical predictions, is attempted. For this purpose a series of 10 steel-fiber concrete beams with various cross-sections and steel-fiber volume fractions tested in pure torsion, are reported here. Furthermore, experimental information compiled from works around the world are also used in an attempt to establish the validity of the described approach based on test results of a broad range of studies. From these comparisons it is demonstrated that the proposed analysis describes well the behaviour of steel-fiber concrete in pure torsion even in the case of elements with non-rectangular cross-sections.
An experimental study on creep deformation of thin-walled tubes under pure bending
Hsu, Chien-Min ; Fan, Chun-Huei ;
Structural Engineering and Mechanics, volume 9, issue 4, 2000, Pages 339~347
DOI : 10.12989/sem.2000.9.4.339
The creep deformation of pure bending (hold constant moment for a period of time) tests were conducted in this paper. Thin-walled tubes of 304 stainless steel were used in this investigation. The curvature-ovalization measurement apparatus, designed by Pan et al. (1998), was used for conducting the present experiments. It has been found that as soon as the creep deformation is started, the magnitudes of the tube curvature and ovalization of tube cross-section quickly increase. The magnitudes of the creep curvature and ovalization of tube cross-section increase fast with a higher hold moment than that with a lower one. Owing to the continuously increasing curvature during the creep deformation, the tube specimen buckles eventually.
Numerical investigation on beams prestressed with FRP
Pisani, Marco A. ;
Structural Engineering and Mechanics, volume 9, issue 4, 2000, Pages 349~364
DOI : 10.12989/sem.2000.9.4.349
This paper aims to make a contribution to understanding which methods apply for structural analysis of beams prestressed with FRP cables. A parametric non-linear numerical analysis of simply supported beams has been performed. In this analysis the shape of the cross-section, the strength of concrete, the material adopted for the cables (steel, GFRP, CFRP), the prestressing system (bonded or unbonded prestressing) and the degree of prestressing were changed to collect a broad range of data which, the author contends, should cover the most frequent types of common practice. The output data themselves and their comparison allow us to suggest some rules that could be adopted when dealing with beams prestressed with these innovatory materials that have an elastic-brittle behaviour.
Experimental study on the seismic behavior in the connection between CFRT column and steel beam
Lu, Xilin ; Yu, Yong ; Kiyoshi, Tanaka ; Satoshi, Sasaki ;
Structural Engineering and Mechanics, volume 9, issue 4, 2000, Pages 365~374
DOI : 10.12989/sem.2000.9.4.365
The structural behavior of connections between concrete-filled rectangular tubular column (CFRT column) and steel beam has been studied in this paper through sub-assemblage loading tests. It is found that the sub-assemblages exhibit ductile restoring force characteristics under seismic loading. A formula for the prediction of the yield strength of each member in the connection is proposed by using the yield line theory under the assumption of a simple stress transfer mechanism. It is shown that the proposed formula can produce a reasonable prediction while providing a basis for further investigation.
Cyclic compressive loading-unloading curves of brick masonry
AlShebani, Milad M. ; Sinha, S.N. ;
Structural Engineering and Mechanics, volume 9, issue 4, 2000, Pages 375~382
DOI : 10.12989/sem.2000.9.4.375
Experimental investigation into the cyclic behaviour of sand plast brick masonry was performed on forty two square panels. The panels were subjected to cyclic uniaxial compression for two cases of loading: normal to bed joint and parallel to bed joint. Experimental data were used to plot the unloading-reloading curves for the entire range of the stress-strain curve. Mathematical expressions to predict the reloading and unloading stress-strain curves at various values of residual strain are proposed. A simple parabola and an exponential type formula are found adequate to model the unloading and reloading curves respectively. The models account for the potential effects of residual strain on these curves. Comparison of test results with the proposed mathematical expression shows good correspondence.
A study of response control on the passive coupling element between two parallel structures
Zhu, Hongping ; Iemura, Hirokazu ;
Structural Engineering and Mechanics, volume 9, issue 4, 2000, Pages 383~396
DOI : 10.12989/sem.2000.9.4.383
A new structure-vibration-control approach is proposed which uses a passive coupling element between two parallel structures to reduce the seismic response of a system due to earthquake excitation. Dynamic characteristics of the two coupled single-degree-freedom systems subject to stationary white-noise excitation are examined by means of statistical energy analysis (SEA) techniques. Optimal parameters of the passive coupling element such as damping and stiffness under different circumstances are determined with an emphasis on the influence of the structural parameters of the system on the optimal parameters and control effectiveness. Numerical results including the root mean square values of the response due to the filtered white-noise excitation and the time-histories of response to El Centro 1940 NS excitation are presented.
New phenomena associated with the nonlinear dynamics and stability of autonomous damped systems under various types of loading
Sophianopoulos, Dimitris S. ;
Structural Engineering and Mechanics, volume 9, issue 4, 2000, Pages 397~416
DOI : 10.12989/sem.2000.9.4.397
The present study deals with the nonlinear dynamics and stability of autonomous dissipative either imperfect potential (limit point) systems or perfect (bifurcational) non-potential ones. Through a fully nonlinear dynamic analysis, performed on two simple 2-DOF models corresponding to the classes of systems mentioned above, and with the aid of basic definitions of the theory of nonlinear dynamical systems, new important phenomena are revealed. For the first class of systems a third possibility of postbuckling dynamic response is offered, associated with a point attractor on the prebuckling primary path, while for the second one the new findings are chaos-like (most likely chaotic) motions, consecutive regions of point and periodic attractors, series of global bifurcations and point attractor response of always existing complementary equilibrium configurations, regardless of the value of the nonconservativeness parameter.