On The Dynamic Response Of Hardening Systems
Author(s)
O. Sircovich Saar
Abstract
This paper relates to hardening systems, their response to dynamic forces and
their contribution to seismic isolation of buildings’ foundations.
The free vibration curve for a structure of continuous gradual changing of
period and frequency, the dynamic load factor (DLF) for a suddenly applied
constant load, and the curve of resonance for a pulsating sinusoidal force, are
analyzed from the perspective of a structural engineer, which is essentially
different from that of a researcher.
The paper suggests a new approach for base seismic isolation, which is a
combination of a base isolation device and a hardening steel structure.
While the contribution of the isolation device is its characteristically high
flexibility, the contribution of the steel structure consists of a smooth reduction
of the building’s base displacement under a given earthquake.
The combined isolation system also provides a gradual limitation of the
building’s base displacement under an unexpected increase of the earthquake’s
peak ground acceleration (PGA).
Keywords: seismic isolation device, hardening steel structure, smooth reduction
of base displacement, limitation of base displacement.
1 Introduction
This paper presents a new approach for base seismic isolation, which is a
combination of a base isolation device and a hardening steel structure.
According to the results of preliminary investigations, this combination is
conducive to a remarkable reduction of the maximum displacement of the
isolated structure and to an appreciable limitation of this displacement under and
unexpected increase of the design earthquake’s PGA. The response of a linear elastic structure, (curve 1 in fig. 1), subjected to a dynamic load is very well known and its basic characteristics, such as natural
Keywords
seismic isolation device, hardening steel structure, smooth reduction
of base displacement, limitation of base displacement.
Related Book
Other papers in this volume
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