Spectrum-based Estimation Method For
Peak Structural Responses Of A SDOF System
Pounding Against Rigid Structures
Author(s)
B. T. Tran & K. Kasai
Abstract
A spectrum-based method is proposed for predicting peak responses of a SDOF
system that pounds against adjacent rigid structure(s) during an earthquake.
Pounding is considered to occur on either one side or two sides of the system.
The contact element is simulated by the Kelvin body combining a spring and a
dashpot in parallel. Based on free vibration and harmonic vibration both
involving pounding, the equivalent period and damping of the SDOF system are
obtained and used to predict peak displacements as well as collision force. The
accuracy of the proposed method is demonstrated via extensive numerical
experiments over a variety of combinations of system properties, contact element
properties, separation distances, and earthquakes.
Keywords: relative displacement, structural pounding, viscoelastic contact
element, coefficient of restitution, equivalent period, equivalent damping.
1 Introduction
Pounding between buildings occurs when separation distance is insufficient to
accommodate the peak relative displacement between them [1, 2]. The collision
between two buildings is typically simulated by contact element, which becomes
active only when contact is detected. Several types of contact element such as
linear/nonlinear spring element, and linear/nonlinear viscoelastic element have
been used for pounding simulation [3-5]. The use of numerical methods for this
nonlinear dynamic problem poses many difficulties and requires time-consuming
efforts. Moreover, using numerical methods at the beginning of design may not
be an efficient choice because of the nature of design process, where repetitive
Keywords
relative displacement, structural pounding, viscoelastic contact
element, coefficient of restitution, equivalent period, equivalent damping.
Related Book
Other papers in this volume
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