لخّصلي

Abstract Selection and Scaling of ground motion plays a major role in designing the structural analysis since the collected data will be applied as seismic load to the structure.Using scale factor more than limit 4, effect the lateral displacement demand of the structural analysis which lead to bias in some cases.The paper includes three analysis procedures (1) Equivalent lateral force, (2) Response spectrum analysis and; (3) Time history analysis; are applied to the structures which are multi-degree-of-freedom structures with different fundamental periods of vibrations.Seven sets of ground motion suites are collected based on different scale factor ranges from PEER-NGA website.Keywords: Scale factor, ASCE code, PEER-NGA, Ground motion scaling, Magnitude, Source-to-site-distanceTarget spectrum is selected by using the ASCE code guideline.

Abstract
Selection and Scaling of ground motion plays a major role
in designing the structural analysis since the collected data will
be applied as seismic load to the structure. Spectrum matching
to a smooth target spectrum with the specific input parameters
of the scenario; magnitude and source-to-site-distance are
focused; is considered in the research. Target spectrum is
selected by using the ASCE code guideline. The paper includes
three analysis procedures (1) Equivalent lateral force, (2)
Response spectrum analysis and; (3) Time history analysis; are
applied to the structures which are multi-degree-of-freedom
structures with different fundamental periods of vibrations.
Seven sets of ground motion suites are collected based on
different scale factor ranges from PEER-NGA website. Using
scale factor more than limit 4, effect the lateral displacement
demand of the structural analysis which lead to bias in some
cases. This study indicated that using scale factor less than 1
tend to underestimate the structural response and more
cracking than the limit 4 tend to overestimate the demand
which is not convenient in practice.

Keywords: Scale factor, ASCE code, PEER-NGA, Ground motion
scaling, Magnitude, Source-to-site-distance