ATC

ATC-55 Project: Evaluation of Inelastic Seismic Analysis Procedures

Ground Motions (GM)
Selection of GM
Time History plots
Text Files

Time History Scaling
Procedures
Scaling Factors
MATLAB routine
Response Spectrum plots

Bilinear SDOF Property
NEHRP Demand
Mean Spectra Demand

Coefficient Method (CM)
Procedures
MATLAB routine (NEHRP)
MATLAB routine (Mean Spectra)

Modified Coefficient Method (MCM)
Procedures
MATLAB routine (NEHRP)
MATLAB routine (Mean Spectra)

Capacity Spectrum Method (CSM)
Procedures
MATLAB routine (NEHRP)
MATLAB routine (Mean Spectra)

Modified Acceleration Displacement Response Spectrum Method (MADRS)
Procedures
MATLAB routine (NEHRP)
MATLAB routine (Mean Spectra)

Nonlinear Time History Analysis (NTA)
Procedures
MATLAB routine (NEHRP)
MATLAB routine (Mean Spectra)
Data

Results

MATLAB Subroutines

Introduction:

Chapter 7 of the draft project report contains results of a study of the application of previously existing and newly proposed methods for estimating peak displacement response of a SDOF oscillator subjected to earthquake ground motion. Some of the results were for ground motions scaled by magnitude and distance. Later results were for ground motions scaled so the average of the 5-percent-damped spectra would approximately match the NEHRP spectra. This web site pertains to the latter results.

Text to the left provides links to all the input data, routines, and results used in the study of the ground motions scaled for the NEHRP spectrum. Information is intended to be self-explanatory. Do not hestitate to contact Jack Moehle at moehle@peer.berkeley.edu or Tony Yang at yang@peer.berkeley.edu should you have any questions.

One minor explanation is warranted. The new equivalent linearization methods of Chapter 6 have collectively been referred to as the MADRS method. This was for convenience only. We recognize that MADRS is but one of a few procedures, aimed at the same result, provided in that chapter. The procedures used are described to the left.