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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 6, Issue 8 - Dec 1998
Volume 6, Issue 7 - Oct 1998
Volume 6, Issue 6 - Sep 1998
Volume 6, Issue 5 - Jul 1998
Volume 6, Issue 4 - Jun 1998
Volume 6, Issue 3 - Apr 1998
Volume 6, Issue 2 - Mar 1998
Volume 6, Issue 1 - Jan 1998
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Correlation of damage and analysis of R/C building: Experience from the 1995 Kobe earthquake
Matsumori, Taizo ; Otani, Shunsuke ;
Structural Engineering and Mechanics, volume 6, issue 8, 1998, Pages 841~856
DOI : 10.12989/sem.19220.127.116.111
During the 1995 Hyogoken-Nanbu Earthquake, a reinforced concrete building, called Jeunesse Rokko, suffered intermediate damage by forming a beam-yielding (weak-beam strong-column) mechanism, which has been regarded as the most desirable earthquake resisting mechanism throughout the world. High cost to repair damage at many beam ends and poor appearance expected after the repair work made the owner decide to tear down the building. Nonlinear earthquake response analyses were conducted to simulate the behavior of the building during the earthquake. The influence of non-structural members was considered in the analysis. The calculated results were compared with the observed damage, especially the location of yield hinges and compression failure of spandrel beams, and the degree of cracking in columns and in column-girder connections.
Nonlinear programming approach for a class of inverse problems in elastoplasticity
Ferris, M.C. ; Tin-Loi, F. ;
Structural Engineering and Mechanics, volume 6, issue 8, 1998, Pages 857~870
DOI : 10.12989/sem.1918.104.22.1687
This paper deals with a special class of inverse problems in discrete structural plasticity involving the identification of elastic limits and hardening moduli on the basis of information on displacements. The governing equations lead naturally to a special and challenging optimization problem known as a Mathematical Program with Equilibrium Constraints (MPEC), a key feature of which is the orthogonality of two sign-constrained vectors or so-called "complementarity" condition. We investigate numerically the application of two simple algorithms, both based on the use of the general purpose nonlinear programming code CONOPT accessed via the GAMS modeling language, for solving the suitably reformulated problem. Application is illustrated by means of two numerical examples.
Direct design of truss bridges using advanced analysis
Kim, S.E. ;
Structural Engineering and Mechanics, volume 6, issue 8, 1998, Pages 871~882
DOI : 10.12989/sem.1922.214.171.1241
This paper presents a new design method of truss bridges using advanced analysis. In this approach, separate member capacity checks encompassed by the specification equations are not required because the stability of separate members and the structure as a whole can be treated rigorously for the determination of the maximum strength of the structures. The method is developed and refined by modifications to the conventional elastic-plastic hinge method. Verification studies are carried out by comparing with the plastic-zone solutions. The load-deflection behavior of the truss shows a good agreement between the plastic-zone analysis. A case study is provided for a truss bridge. Member sizes determined by the proposed method are compared with those determined by the conventional method. It is concluded that the proposed method is suitable for adoption in practice.
Stresses analyses of shell structure with large holes
Tian, Zongshu ; Liu, Jinsong ;
Structural Engineering and Mechanics, volume 6, issue 8, 1998, Pages 883~899
DOI : 10.12989/sem.19126.96.36.1993
The strength, deformation and buckling of a large engineering structure consisting of four ellipsoidal shells, two cylindrical shells with stiffening ribs and large holes, one conical shell and three pairs of large flanges under external pressure, self weight and heat sinks have been analysed by using two kinds of five different finite elements - four assumed displacement finite elements (shell element with curved surfaces, axisymmetric conical shell element with variable thickness, three dimensional eccentric beam element, axisymmetric solid revolutionary element) and an assumed stress hybrid element (a 3-dimensional special element developed by authors). The compatibility between different elements is enforced. The strength analyses of the top cover and the main vessel are described in the paper.
RELSYS: A computer program for structural system reliability
Estes, Allen C. ; Frangopol, Dan M. ;
Structural Engineering and Mechanics, volume 6, issue 8, 1998, Pages 901~919
DOI : 10.12989/sem.19188.8.131.521
Most reliability-based analyses focus on the reliability of the individual components of a structure. There are many advantages to examining the components in combination as an entire structural system. This paper illustrates an algorithm used in the computer program RELSYS (RELiability of SYStems) which computes the system reliability of any structure which can be modeled as a series-parallel combination of its components. A first-order method is used to initially compute the reliability of each individual component. The system reliability is computed by successively reducing the series and parallel systems until the system has been simplified to a single equivalent component. Equivalent alpha vectors are used to account for the correlation between failure modes during the system reduction process.
A four-node degenerated shell element with drilling degrees of freedom
Kim, Ji-Hun ; Lee, Byung-Chai ;
Structural Engineering and Mechanics, volume 6, issue 8, 1998, Pages 921~937
DOI : 10.12989/sem.19184.108.40.2061
A new four-node degenerated shell element with drilling degrees of freedom (DOF) is proposed. Allman-type displacement approximation is incorporated into the formulation of degenerated shell elements. The approximation improves in-plane performance and eliminates singularities of system matrices resulted from DOF deficiency. Transverse shear locking is circumvented by introducing assumed covariant shear strains. Two kinds of penalty energy are considered in the formulation for the purpose of suppressing spurious modes and representing true drilling rotations. The proposed element can be applied to almost all kinds of shell problems including composite laminated shell structures and folded shell structures. Numerical examples show that the element is of good accuracy and of reasonably fast convergence rate.
Vibration, buckling and dynamic stability of a cantilever rectangular plate subjected to in-plane force
Takahashi, Kazuo ; Wu, Mincharn ; Nakazawa, Satoshi ;
Structural Engineering and Mechanics, volume 6, issue 8, 1998, Pages 939~953
DOI : 10.12989/sem.19220.127.116.119
Vibration, buckling and dynamic stability of a cantilever rectangular plate subjected to an in-plane sinusoidally varying load applied along the free end are analyzed. The thin plate small deflection theory is used. The Rayleigh-Ritz method is employed to solve vibration and buckling of the plate. The dynamic stability problem is solved by using the Hamilton principle to drive time variables. The resulting time variables are solved by the harmonic balance method. Buckling properties and natural frequencies of the plate are shown at first. Unstable regions are presented for various loading conditions. Simple parametric resonances and combination resonances with sum type are obtained for various loading conditions, static load and damping.
Soft computing with neural networks for engineering applications: Fundamental issues and adaptive approaches
Ghaboussi, Jamshid ; Wu, Xiping ;
Structural Engineering and Mechanics, volume 6, issue 8, 1998, Pages 955~969
DOI : 10.12989/sem.1918.104.22.1685
Engineering problems are inherently imprecision tolerant. Biologically inspired soft computing methods are emerging as ideal tools for constructing intelligent engineering systems which employ approximate reasoning and exhibit imprecision tolerance. They also offer built-in mechanisms for dealing with uncertainty. The fundamental issues associated with engineering applications of the emerging soft computing methods are discussed, with emphasis on neural networks. A formalism for neural network representation is presented and recent developments on adaptive modeling of neural networks, specifically nested adaptive neural networks for constitutive modeling are discussed.