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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 & Issues
Volume 12, Issue 6 - Dec 2001
Volume 12, Issue 5 - Nov 2001
Volume 12, Issue 4 - Oct 2001
Volume 12, Issue 3 - Sep 2001
Volume 12, Issue 2 - Aug 2001
Volume 12, Issue 1 - Jul 2001
Volume 11, Issue 6 - Jun 2001
Volume 11, Issue 5 - May 2001
Volume 11, Issue 4 - Apr 2001
Volume 11, Issue 3 - Mar 2001
Volume 11, Issue 2 - Feb 2001
Volume 11, Issue 1 - Jan 2001
Selecting the target year
A study of continuous stem girder systems
Kim, Boksun ; Wright, Howard D. ; Cairns, Roy ;
Structural Engineering and Mechanics, volume 11, issue 5, 2001, Pages 469~484
DOI : 10.12989/sem.2001.11.5.469
A new beam system comprising two cantilever stems and an interspan composite beam has been developed and its design philosophy is described in this paper. The system provides the equivalent of a semi-continuous beam without the requirement to calculate the moment rotation capacity of the beam-to-column connection. The economy of braced frames using the system has been investigated and compared with simple, continuous or semi-rigid systems. It is shown that the costs of the proposed system are similar to the semi-rigid system and cheaper than both the simply supported and rigid beam systems. Two tests have been carried out on 6 meter span beams, which also incorporated an asymmetric flange steel section. The behaviour of the system is presented and the test results are compared with those obtained from the theory.
Biologically inspired soft computing methods in structural mechanics and engineering
Ghaboussi, Jamshid ;
Structural Engineering and Mechanics, volume 11, issue 5, 2001, Pages 485~502
DOI : 10.12989/sem.2001.11.5.485
Modem soft computing methods, such as neural networks, evolutionary models and fuzzy logic, are mainly inspired by the problem solving strategies the biological systems use in nature. As such, the soft computing methods are fundamentally different from the conventional engineering problem solving methods, which are based on mathematics. In the author's opinion, these fundamental differences are the key to the full understanding of the soft computing methods and in the realization of their full potential in engineering applications. The main theme of this paper is to discuss the fundamental differences between the soft computing methods and the mathematically based conventional methods in engineering problems, and to explore the potential of soft computing methods in new ways of formulating and solving the otherwise intractable engineering problems. Inverse problems are identified as a class of particularly difficult engineering problems, and the special capabilities of the soft computing methods in inverse problems are discussed. Soft computing methods are especially suited for engineering design, which can be considered as a special class of inverse problems. Several examples from the research work of the author and his co-workers are presented and discussed to illustrate the main points raised in this paper.
Reduction of train-induced vibrations on adjacent buildings
Hung, Hsiao-Hui ; Kuo, Jenny ; Yang, Yeong-Bin ;
Structural Engineering and Mechanics, volume 11, issue 5, 2001, Pages 503~518
DOI : 10.12989/sem.2001.11.5.503
In this paper, the procedure for deriving an infinite element that is compatible with the quadrilateral Q8 element is first summarized. Enhanced by a self mesh-expansion procedure for generating the impedance matrices of different frequencies for the region extending to infinity, the infinite element is used to simulate the far field of the soil-structure system. The structure considered here is of the box type and the soils are either homogeneous or resting on a bedrock. Using the finite/infinite element approach, a parametric study is conducted to investigate the effect of open and in-filled trenches in reducing the structural vibration caused by a train passing nearby, which is simulated as a harmonic line load. The key parameters that dominate the performance of wave barriers in reducing the structural vibrations are identified. The results presented herein serve as a useful guideline for the design of open and in-filled trenches concerning wave reduction.
Effects of initial imperfections on nonlinear behaviors of thin-walled members
Ohga, M. ; Takaue, A. ; Shigematsu, T. ; Hara, T. ;
Structural Engineering and Mechanics, volume 11, issue 5, 2001, Pages 519~534
DOI : 10.12989/sem.2001.11.5.519
The effect of the initial imperfections on the nonlinear behaviors and ultimate strength of the thin-walled members subjected to the axial loads, obtained by the finite element stability analysis, are examined. As the initial imperfections, the bucking mode shapes of the members are adopted. The buckling mode shapes of the thin-walled members are obtained by the transfer matrix method. In the finite element stability analysis, isoparametric degenerated shell element is used, and the geometrical and material nonlinearity are considered based on the Green Lagrange strain definition and the Prandtl-Reuss stress-strain relation following the von Mises yield criterion. The U-, box- and I-section members subjected to the axial loads are adopted for numerical examples, and the effects of the initial imperfections on the nonlinear behaviors and ultimate strength of the members are examined.
Dof splitting p-adaptive meshless method
Kang, Myung-Seok ; Youn, Sung-Kie ;
Structural Engineering and Mechanics, volume 11, issue 5, 2001, Pages 535~546
DOI : 10.12989/sem.2001.11.5.535
A new p-adaptive analysis scheme for hp-clouds method is presented. In the scheme, refined global equations are resolved into two parts, one of them being related to the newly appended dof's. The solution obtained in previous analysis step is reflected in the force vector. The size of the p-adaptive equation consisting of the newly appended dof's is much smaller than the original equation. Consequently, the computational cost is drastically decreased. Through numerical examples, the efficiency and efficacy of the method in comparison with the existing p-refinement scheme of the hp-clouds have been demonstrated.
A two-phase interface element for simulation of lining systems
Liu, X. ; Scarpas, A. ; Blaauwendraad, J. ;
Structural Engineering and Mechanics, volume 11, issue 5, 2001, Pages 547~564
DOI : 10.12989/sem.2001.11.5.547
The numerical formulation of a two-phase interface element appropriate for porous lining system is presented. The formulation is isoparametric and can be applied both for 2-D and 3-D analysis. Biot's theory is utilized as the basis for the development of the element constitutive theory. In order to be capable of simulating the reinforcing characteristics of some geotextiles utilized as lining system, a reinforcement component has also been implemented into the formulation. By employing this specially developed interface finite element, the influence of soil consolidation on the stress distribution along the lining system of a reservoir and a landfill has been investigated.
Deformation characteristics of brick masonry due to partial unloading
Alshebani, Milad M. ; Sinha, S.N. ;
Structural Engineering and Mechanics, volume 11, issue 5, 2001, Pages 565~574
DOI : 10.12989/sem.2001.11.5.565
Experimental investigation into the behaviour of half-scale brick masonry panels were conducted under cyclic loading normal to the bed joint and parallel to the bed joint. For each cycle, full reloading was performed with the cycle peaks coinciding approximately with the envelope curve. Unloading, however, was carried out fully to zero stress level and partially to two different stress levels of 25 percent and 50 percent of peak stress. Stability point limit exhibits a unique stress-strain curve for full unloading but it could not be established for partial unloading. Common point limit was established for all unloading-reloading patterns considered, but its location depends on the stress level at which unloading is carried to. Common point curves were found to follow an exponential formula, while residual strains versus envelope strains can be expressed by a polynomial function of a single term. The relation between residual strain and envelope strain can be used to determine the stress level at which deterioration due to cyclic loading began.