Efficiency of a tuned liquid column damper considering a seismic excitation of low frequency content and uncertainty
DOI:
https://doi.org/10.4067/S0718-28132021000100054Keywords:
TLCD, Parameter uncertainty, Stochastic analysis, Low frequency contentAbstract
In this research the behaviour of a linear structure controlled by a tuned liquid column damper (TLCD) subjected to stochastic seismic excitations of low frequency content is analysed. To accommodate the non-linear nature of TLCD, an equivalent statistical linearization is performed. The behaviour of the optimal TLCD design parameters, frequency ratio and pressure loss coefficient, when entering uncertainty in system parameters, is studied. The parameters considered were the mass ratio, the length ratio and the pressure drop coefficient. The optimization objective is to reduce the standard deviation of the displacement of the structure. The effect of the inclusion of uncertainty in the parameters, in the reduction of the displacement of the structure, and in the root mean square RMS of the displacement of the structure is analysed. It is found that an uncertainty in the mass ratio, and in the TLCD length ratio, does not produce variations in the efficiency or in the RMS of displacement of the structure. However, an uncertainty in the value of the period of the structure produces large variations in the efficiency and the RMS of the displacement of the structure.
References
Chakraborty, S., Debbarma, R. and Marano, G.C. (2012). Performance of tuned liquid column dampers considering maximum liquid motion in seismic vibration control of structures. Journal of Sound and Vibration 331(7), 1519–1531.
Debbarma, R., Chakraborty, S. and Ghosh, S.K. (2010). Optimum design of tuned liquid column dampers under stochastic earthquake load considering uncertain bounded system parameters. International Journal of Mechanical Sciences 52(10), 1385-1393.
Espinoza, G., Saavedra, J., Gajardo, K., Suazo, A. y Cifuentes, C. (2021). Eficiencia de un amortiguador de columna de líquido considerando una excitación sísmica de alto contenido de frecuencias e incertidumbre. Obras y Proyectos 29, 67-79.
Espinoza, G., Sagredo, G. y Suazo, A. (2020a). Análisis de la eficiencia de un amortiguador combinado sintonizado con incertidumbre en los parámetros sometido a una excitación sísmica de alto contenido de frecuencias. Obras y Proyectos 28, 58-67.
Espinoza, G., Rivas, S. y Suazo, A. (2020b). Análisis de la eficiencia de un amortiguador combinado sintonizado con incertidumbre en los parámetros sometido a excitaciones sísmicas de bajo contenido de frecuencias. Obras y Proyectos 28, 68-77.
Espinoza, G., Carrillo, C. and Suazo, A. (2018). Analysis of a tuned liquid column damper in non-linear structures subjected to seismic excitations. Latin American Journal of Solids and Structures 15(7), e91.
Furtmüller, T., Di Matteo, A., Adam, C. and Pirrotta, A. (2019). Base-isolated structure equipped with tuned liquid column damper: An experimental study. Mechanical Systems and Signal Processing 116, 816-831.
Ghosh, A. and Basu, B. (2005). Effect of soil interaction on the performance of liquid column dampers for seismic applications. Earthquake Engineering and Structural Dynamics 34(11), 1375-1389.
Rozas, L., Boroschek, R.L., Tamburrino, A. and Rojas, M. (2015). A bidirectional tuned liquid column damper for reducing the seismic response of buildings. Structural Control and Health Monitoring 23(4), 621–640.
Saitua, F., Lopez-Garcia, D. and Taflanidis, A.A. (2018). Optimization of height-wise damper distributions considering practical design issues. Engineering Structures 173,768-786.
Sakai, F., Takaeda, S. and Tamaki, T. (1989). Tuned liquid column damper - New type device for suppression of building vibrations. First International Conference on High-Rise Buildings, Nanjing, China, 926-931.
Won, A.Y., Pires, J.A. and Haroun, M.A. (1996). Stochastic seismic performance evaluation of tuned liquid column dampers. Earthquake Engineering and Structural Dynamics 25(11), 1259-1274.
Xu, Y.L., Samali, B. and Kwok, K.C.S. (1992). Control of alongwind response of structures by mass and liquid dampers. Journal of Engineering Mechanics 118(1), 20-39.
Zhu, F., Wang, J.T., Jin, F. and Altay, O. (2015). Real-time hybrid simulation of single and multiple tuned liquid column dampers for controlling seismic-induced response. 6th International Conference on Advances in Experimental Structural Engineering, University of Illinois, Urbana-Champaign, USA.
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