Comparison Of Seismic Demands Determined By
Nonlinear Static Analysis According To ATC-40,
FEMA-356 And EC-8
Author(s)
V. S. Tsiggelis, A. M. Athanatopoulou & I. E. Avramidis
Abstract
For evaluation and retrofit design of existing buildings and other structures, as
well as the design of new construction, inelastic analysis procedures are used.
Several publications present performance-based methods that rely on nonlinear
static analysis procedures, which involve generation of a \“pushover” curve, but
differ in the technique used to calculate the inelastic displacement demand for a
given ground motion. The present study consists of an application of the current
procedures and a comparison between them. The application examples
demonstrate that there are differences in the results produced by the various
approaches.
Keywords: nonlinear static analysis, pushover, coefficient method, capacity
spectrum method, seismic demands.
1 Introduction
It is now common practice to estimate seismic demands by nonlinear static
analysis of the structure subjected to monotonically increasing lateral forces with
invariant height-wise distribution, until a target value of roof displacement is
reached. Recently, much work has been done to develop and evaluate simplified
methods for estimating peak deformation of inelastic systems, which has led to
the \“capacity spectrum method” detailed in the ATC-40 [Procedures A, B and C]
[1] and FEMA-274 [2] reports, as well as the \“coefficient method” outlined in
the FEMA-356 [3] guidelines and the method suggested in EC-8 [4]. The main
objective of the present study is to check the practical applicability of these
Keywords
nonlinear static analysis, pushover, coefficient method, capacity
spectrum method, seismic demands.
Related Book
Other papers in this volume
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