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Non-Linear Response of Cable-Mass-Spring System in High-Rise Buildings under Stochastic Seismic Excitation

Weber, H., Kaczmarczyk, S. and Iwankiewicz, R. (2021) Non-Linear Response of Cable-Mass-Spring System in High-Rise Buildings under Stochastic Seismic Excitation. Materials. 14(22) 1996-1944.

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Weber_etal_Materials_2021_Non-Linear_Response_of_Cable-Mass-Spring_System_in_High-Rise_Buildings_under_Stochastic_Seismic_Excitation
Weber_etal_Materials_2021_Non_Linear_Response_of_Cable_Mass_Spring_System_in_High_Rise_Buildings_under_Stochastic_Seismic_Excitation.pdf - Published Version
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Abstract:
In high-rise buildings, earthquake ground motions induce bending deformation of the host structure. Large dynamic displacements at the top of the building can be observed which in turn lead to the excitation of the cables/ropes within lift installations. In this paper, the stochastic dynamics of a cable with a spring-damper and a mass system deployed in a tall cantilever structure under earthquake excitation is considered. The non-linear system is developed to describe lateral displacements of a vertical cable with a concentrated mass attached at its lower end. The system is moving slowly in the vertical direction. The horizontal displacements of the main mass are constrained by a spring-viscous damping element. The earthquake ground motions are modelled as a filtered Gaussian white noise stochastic process. The equivalent linearization technique is then used to replace the original non-linear system with a linear one with the coefficients determined by utilising the minimization of the mean-square error between both systems. Mean values, variances and covariances of particular random state variables have been obtained by using the numerical calculation. The received results were compared with the deterministic response of the system to the harmonic process and were verified against results obtained by Monte Carlo simulation.
Uncontrolled Keywords:
Gaussian white noise process, equivalent linearization technique, non-linear system, seismic vibrations, stochastic dynamics, General Materials Science
Creators:
Weber, H., Kaczmarczyk, S. and Iwankiewicz, R.
Date:
14 November 2021
Date Type:
Publication
Journal or Publication Title:
Materials
Volume:
14
Number:
22
Number of Pages:
24
Language:
English
DOI:
10.3390/ma14226858
ISSN:
1996-1944
Status:
Published / Disseminated
Refereed:
Yes
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