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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Smart Structures and Systems
Journal Basic Information
Journal DOI :
Editor in Chief :
Chung-Bang Yun / B. F. Spencer, Jr. / Fabio Casciati
Volume & Issues
Volume 2, Issue 4 - Oct 2006
Volume 2, Issue 3 - Jul 2006
Volume 2, Issue 2 - Apr 2006
Volume 2, Issue 1 - Jan 2006
Selecting the target year
Analysis of layered bases-foundations models under seismic actions
Aghalovyan, L.A. ; Sahakyan, A.V. ; Aghalovyan, M.L. ;
Smart Structures and Systems, volume 2, issue 4, 2006, Pages 295~304
DOI : 10.12989/sss.2006.2.4.295
The paper considers the dynamic behaviour of the two-layered and multi-layered plate packets under dynamic (seismic) loading. These models correspond to the base-foundation packet structures. The analysis of the various models, including the models of contact between the layers, is derived on the base of the precise solutions of elasticity theory equations. It is shown that the application of the seismoisolator or, in general, less rigid materials between the base and the foundation brings to reduction of the natural frequencies of free vibrations of the packet base-foundation, as well as to the significant reduction of the negative seismic effect on the structures.
Rehabilitation of hospital buildings using passive control systems
Syrmakezis, C.A. ; Mavrouli, O.A. ; Antonopoulos, A.K. ;
Smart Structures and Systems, volume 2, issue 4, 2006, Pages 305~312
DOI : 10.12989/sss.2006.2.4.305
In the case of hospital buildings, where seismic design requirements are very high, existing structuresand especially those attacked by past earthquakes, appear, often, unable to fulfil the necessary safety prerequisites. In this paper, the retrofitting of hospital buildings is investigated, using alternative methods of repair and strengthening. Analysis of an existing hospital building in Patras, Greece, is performed. The load-bearing system is a reinforced concrete system. Two solutions are proposed: strengthening using concrete jackets around column and beam elements and application of viscoelastic dampers for the increase of the stability of the structure. Adequate finite element models are constructed for each case and conclusions are drawn on the efficiency of each rehabilitation method.
A reliability-based criterion of structural performance for structures with linear damping
Kovaleva, Agnessa ;
Smart Structures and Systems, volume 2, issue 4, 2006, Pages 313~320
DOI : 10.12989/sss.2006.2.4.313
The reliability analysis of structures subjected to stochastic loading involves evaluation of time and probability of the system's residence in a reference domain. In this paper, we derive an asymptotic estimate of exit time for multi-degrees-of-freedom structural systems. The system's dynamics is governed by the Lagrangian equations with linear dissipation and fast additive noise. The logarithmic asymptotic of exit time is found explicitly as a sum of two terms dependent on kinetic and potential energy of the system, respectively. As an example, we estimate exit time and an associated structural performance for a rocking structure.
Testing of rubber bearings for the dynamic damper of seismic isolated buildings
Melkumyan, Mikayel ; Hakobyan, Alexander ;
Smart Structures and Systems, volume 2, issue 4, 2006, Pages 321~328
DOI : 10.12989/sss.2006.2.4.321
The paper describes the testing facilities and the methodology on testing of laminated rubber bearings envisaged for application in the system of Dynamic Damper (DD) of seismic isolated buildings, as well as the obtained results. For the first time in Armenia laminated rubber bearings were tested simultaneously under the action of horizontal shear force and vertical tension force. The test results have proven the possibility of using rubber bearings as elements subjected to tension due to action of the mass of DD. Also it was confirmed that the suggested structural concept of DD for reducing the displacements and shear forces of seismic isolation systems will have reliable behavior during the design level earthquakes.
Seismic isolation of hospital buildings
Soldatova, Liudmila ; Jumukov, Sulaiman ;
Smart Structures and Systems, volume 2, issue 4, 2006, Pages 329~337
DOI : 10.12989/sss.2006.2.4.329
This paper illustrates an analytical investigation of the vibration parameters of buildings on sliding seismic isolation bearings with elastic limiters of the relative displacement. The installation scheme of sliding bearings and elastic limiters for the separate unit of a 4 storey hospital building with brick walls is designed. The analysis of the vibrations of the hospital building is conducted for harmonic base excitation.
Retrofit of a hospital through strength reduction and enhanced damping
Viti, Stefania ; Cimellaro, Gian Paolo ; Reinhorn, Andrei M. ;
Smart Structures and Systems, volume 2, issue 4, 2006, Pages 339~355
DOI : 10.12989/sss.2006.2.4.339
A procedure to retrofit existing essential facilities subjected to seismic excitation is proposed. The main features of this procedure are to reduce maximum acceleration and associated forces in buildings subjected to seismic excitation by reducing their strength (weakening). The weakening retrofit, which is an opposite strategy to strengthening, is particularly suitable for buildings having overstressed components and foundation supports or having weak brittle components. However, by weakening the structure large deformations are expected. Supplementaldamping devices however can control the deformations within desirable limits. The structure retrofitted with this strategy will have, therefore, a reduction in the acceleration response and a reduction in the deformations, depending on the amount of additional damping introduced in the structure. An illustration of the above strategy is presented here through an evaluation of the inelastic response of the structure through a nonlinear dynamic analysis. The results are compared with different retrofit techniques. A parametric analysis has also been carried out to evaluate the effectiveness of the retrofitting method using different combination of the performance thresholds in accelerations and displacements through fragility analysis.
An approach for modelling fracture of shape memory alloy parts
Evard, Margarita E. ; Volkov, Alexander E. ; Bobeleva, Olga V. ;
Smart Structures and Systems, volume 2, issue 4, 2006, Pages 357~363
DOI : 10.12989/sss.2006.2.4.357
Equations describing deformation defects, damage accumulation, and fracture condition have been suggested. Analytical and numerical solutions have been obtained for defects produced by a shear in a fixed direction. Under cyclic loading the number of cycles to failure well fits the empirical Koffin-Manson law. The developed model is expanded to the case of the micro-plastic deformation, which accompanies martensite accommodation in shape memory alloys. Damage of a shape memory specimen has been calculated for two regimes of loading: a constant stress and cyclic variation of temperature across the interval of martensitic transformations, and at a constant temperature corresponding to the pseudoelastic state and cyclic variation of stress. The obtained results are in a good qualitative agreement with available experimental data.