Optimal Design of Viscous Dampers for Vibration Control of Adjacent Building Structures

Ming-Yi Liu; An-Pei Wang; Hsing-Wei Tseng

doi:10.6180/jase.2016.19.4.07

Optimal Design of Viscous Dampers for Vibration Control of Adjacent Building Structures

Ming-Yi Liu This email address is being protected from spambots. You need JavaScript enabled to view it.¹, An-Pei Wang¹ and Hsing-Wei Tseng¹

¹Department of Civil Engineering, Chung Yuan Christian University, Taoyuan, Taiwan 320, R.O.C.

Received: February 22, 2016
Accepted: June 27, 2016
Publication Date: December 1, 2016

Download Citation: ||https://doi.org/10.6180/jase.2016.19.4.07

ABSTRACT

The objective of this paper is to investigate the dynamic characteristics of two adjacent building structures interconnected by viscous dampers under seismic excitations. The computational procedure for an analytical model including the system model formulation, complex modal analysis and seismic time history analysis is presented for this purpose. A numerical example is also provided to illustrate the analytical model.The complex modal analysis is conducted to determine the optimal damping ratio and the optimal damper coefficient of the linear viscous damper for each mode of the system. For the damper coefficient with optimal value, the responses can be categorized into under damped and critically damped vibrations. The seismic time history analysis is conducted to assess the effectiveness of the linear viscous damper for vibration control. Based on the optimal damping ratio and the optimal damper coefficient of the linear viscous damper for a certain mode of the system,compared to the peak responses, the linear viscous damper can be used to more effectively suppress the root-mean-square responses of the two adjacent buildings.

Keywords: Adjacent Building Structure, Viscous Damper, Complex Modal Analysis, Seismic Time History Analysis

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