Auteur Nicos Makris
Documents disponibles écrits par cet auteur (22)
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Sasani, M., Auteur ; Nicos Makris, Auteur ; Bolt, B. A. ; Joel P. Conte, Éditeur scientifique |Under pulse-type ground motions modal analysis is not quite efficient for estimating the elastic response of multi-degree-of-freedom systems, in particular when the effects of higher modes are significant. This paper first shows that the assumpt[...]
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Nicos Makris, Auteur ; Cameron J. Black, Auteur ; Ghanem, Roger G., Éditeur scientifique |In this paper the response of a bilinear oscillator subjected to pulse-type motions is revisited with dimensional analysis. Using Buckingham’s Πtheorem the number of variables in the response analysis is reduced from six (6) to four (4). When th[...]
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Nicos Makris, Auteur ; Ghanem, Roger G., Éditeur scientifique ; Cameron J. Black, Auteur |In this paper, the inelastic response of rigid-plastic and elastic-plastic systems subjected to pulse-type excitations is revisited with dimensional analysis. Starting from Newmark’s result on the maximum displacement of a sliding mass resting o[...]
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Dimitrakopoulos, Elias, Auteur ; Nicos Makris, Auteur ; Kappos, Andreas J., Auteur |In this paper the dynamic response of two and three pounding oscillators subjected to pulse-type excitations is revisited with dimensional analysis. Using Buckingham's -theorem the number of variables that govern the response of the system is re[...]
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Dimitrakopoulos, Elias, Auteur ; Nicos Makris, Auteur ; Kappos, Andreas J., Auteur |In this paper, the dynamic response of a pounding oscillator subjected to pulse type excitations is revisited with dimensional analysis. The study adopts the concept of the energetic length scale which is a measure of the persistence of the dist[...]
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Karavasilis, Theodore L., Auteur ; Choung-Yeol Seo, Auteur ; Nicos Makris, Auteur |The maximum inelastic response of bilinear single-degree-of-freedom (SDOF) systems when subjected to ground motions without distinguishable pulses is revisited with dimensional analysis by identifying timescales and length scales in the time his[...]
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Karavasilis, Theodore L., Auteur ; Nicos Makris, Auteur ; Bazeos, Nikitas, Auteur |An alternative and efficient procedure to estimate the maximum inelastic roof displacement and the maximum inelastic interstory drift ratio along the height of regular multistory steel MRF subjected to pulselike ground motions is proposed. The m[...]
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Gasparini, D. A., Auteur ; Nicos Makris, Éditeur scientifique |A suitable filter that allows studies of the effects of excitation bandwidth approaches zero, the mean square displacement response of a linear single degree of freedom (SDOF) system approaches the mean square response to harmonic excitation. St[...]
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Chen, Xinzhong, Auteur ; Ahsan Kareem, Auteur ; Nicos Makris, Éditeur scientifique |Contemporary high-rise buildings with complex geometric profiles and three-dimensional (3D) coupled mode shapes often complicate the use of high frequency force balance (HFFB) technique customarily used in wind tunnel testing for uncoupled build[...]
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T. Kijewski-Correa, Auteur ; Ahsan Kareem, Auteur ; Nicos Makris, Éditeur scientifique |Two independently emerging time-frequency transformations in Civil Engineering, namely, the wavelet transform and empirical mode decomposition with Hilbert transform (EMD+HT), are discussed in this study. Their application to a variety of nonsta[...]
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Nicos Makris, Auteur ; Cameron J. Black, Auteur ; Ghanem, Roger G., Éditeur scientifique |This paper investigates the ’goodness’ of peak ground velocity as a dependable intensity measure for the earthquake shaking of civil structures. The paper stresses the importance of distinguishing between acceleration pulses and velocity pulses,[...]
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Dimitrios Konstantinidis, Auteur ; Nicos Makris, Auteur |This paper presents results of a comprehensive experimental program on the seismic response of full-scale freestanding laboratory equipment. First, quasi-static experiments are conducted to examine the mechanical behavior of the contact interfac[...]
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Paolucci, Roberto, Auteur ; Spinelli, Davide, Auteur ; Nicos Makris, Éditeur scientifique |Two methods are illustrated to effectively calculate the ground motion induced by constant speed moving loads. On the one hand, the dynamic Betti-Rayleigh reciprocity theorem allows one to take full advantage of the availability of Green's funct[...]
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Sivaselvan, Mettupalayam V., Auteur ; Reinhorn, Andrei M., Auteur ; Nicos Makris, Éditeur scientifique |Computer analysis of structures has traditionally been carried out using the displacement method combined with an incremental iterative scheme for nonlinear problems. In this paper, a Lagrangian approach is developed, which is a mixed method, wh[...]
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Ji-Seong Jo, Auteur ; Cho, Sang-Won, Auteur ; Lee, In-Won ; Nicos Makris, Éditeur scientifique |This technical note presents a method of checking the number of complex eigenvalues in some interested regions or the multiplicity of some complex eigenvalues for nonproportionally damped system. A Schur–Cohn matrix is constructed from the coeff[...]
