In this study, basic methodologies of the GA and the scaling
procedures are summarized, the scaling criteria of real time history
records to satisfy the Syrian design code are discussed. The
traditional time domain scaling procedures and the scali
ng
procedures using GA are utilized to scale a number of the available
real records to match the Syrian design spectra. The resulting time histories of the procedures are investigated and compared in terms of meeting criteria.
In this study, basic methodologies and procedures for generation
synthetic time histories in time domain and frequency domain are
summarized. These synthetic time histories are matching Syrian
spectrum and compatible with wide range of buildings m
odels and
soil types according to the seismic parameters of Lattakia city. This
paper will discuss the Selection and scaling criteria of three real
time history records available in strong ground motion databases to
satisfy the Syrian spectrum, and the suitability as input to time
history analysis of civil engineering structures.
Response spectrum analysis and equivalent static analysis is widely used by
engineers and engineering offices to estimate buildings and structures response
to earthquakes. But performance based procedures to evaluate buildings and new
designs acco
rding to Syrian code and other international codes require response
analysis using smallest of earthquake records, where we can estimate
engineeringdemandparameters(EDPs)—
floordisplacements,storydrifts,memberforces,memberdeformations,etc.—
ofbuildingsandspecialstructuressubjectedtogroundmotions, consecutively to
verify required performance criteria.
Theserecordsshouldbeproperlyselectedandscaledincompliancewithsitespecifichazardconditionstoestimate
(EDPs) and ensure that they verify
―expected‖ median demands.
In this study, background, selection procedures compatible with Syrian
code, and review of most scaling methods were introduced. The structural
response was studied by comparing displacements due to response spectrum
analysis, scaled records using PGA, and synthetic time histories records in time
domain and frequency domain (generated according to Syrian response
spectrum). Tow three-dimensional models of real buildings in Lattakia city were
used as study cases, the results obtained by 20 analysis processes. The results
show that analysis using synthetic records compatible with Syrian code give
noticeably less displacements estimates comparing with response spectrum
analysis and analysis using records scaled by PGA scaling.