Seismic Damage Assessment Of Steel Components
Author(s)
A. Benavent-Climent
Abstract
This paper discusses a new approach to the assessment of damage in structural
steel components under cyclic inelastic loading stories of the type experienced in
earthquakes. The approach is based on a new damage model proposed by the
author. It is shown that the seismic performance of a steel component depends on
two structural performance parameters: b and m. The parameter b is influenced
by the material properties, the prevailing loading condition and the geometry of
the steel component. The parameter m reflects the influence of the structural
system, hysteretic behavior and characteristics of the earthquake. This approach
takes into account that the cumulative damage—in addition to being affected by
the total amount of dissipated energy, the maximum deformation and the number
and amplitude of the cycles of deformation—is also path-dependent.
Keywords: damage model, fatigue, seismic damage, steel component.
1 Introduction
The great damage caused by recent earthquakes, such as Northridge (1994) or
Kobe earthquakes (1995), has highlighted that code design for life safety does
not protect adequately the structure adequately against damage; performance
goals other than life safety (e.g. damage control) must be taken into account
explicitly in the seismic design of new structures (performance-based seismic
design). In the field of earthquake engineering, there is an increasing trend
toward employing damage as a measure of seismic performance in the
assessment and design of structures [1-3]. To this end, accurate damage models
that take into account cumulative damage effects (cumulative models) are needed
for quantifying realistically the expected damage under different design
earthquakes. These models can also provide the basis for judging the safety of
existing structures and reference for retrofit decision making.
Keywords
damage model, fatigue, seismic damage, steel component.
Related Book
Other papers in this volume
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