Energy-based Evaluation Of Seismic Response Of
Structures With Passive And Active Systems
Author(s)
A. Yanik, U. Aldemir & M. Bakioglu
Abstract
In recent years, increased performance requirements and the strong desire for
better utilization of new materials and lower costs have motivated the
development of new concepts for protecting structures. Recent practical
applications and research findings show that the passive and active control
techniques have the potential of protecting civil engineering structures from
severe earthquakes and strong winds. In this paper, application potentials of
passive and active control systems to earthquake excited structures are
investigated in terms of energy distribution in the structure. Dynamic behavior of
a three storey shear frame structure, incorporating passive and active control
systems, subjected to El Centro, Erzincan and the simulated ground motions is
investigated. The well-known Kanai-Tajimi power spectral density function is
used to generate the simulated ground motion. Instantaneous optimal control
algorithm which minimizes a performance index defined as a time dependent
quadratic scalar functional instead of a quadratic integral functional and takes
into account only the current state is used as an active control algorithm. A
computer program which takes into account the nonlinear material property is
developed for the dynamic analysis of the controlled and the uncontrolled
structure. Nonlinear differential equation of the motion is solved by Wilson-θ
numerical method. The numerical simulation results are presented in a
comparative way for uncontrolled, passively controlled, actively controlled
structures by graphical representations with hysteretic curves and the
distributions of the damping energy, total kinetic energy, strain energy and
seismic energy. An energy based evaluation of the example structure
incorporating different combinations of passive and active systems is made.
Keywords: energy, structural control, earthquake, active control, passive
control.
Keywords
energy, structural control, earthquake, active control, passive
control
Related Book
Other papers in this volume
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