The purpose of this report is to determine the effectiveness of using shear walls with Moment-resisting frames by modeling two bare frame structures. The first model is a combination of bare frames and shear walls, and the second model is without she
ar walls, and analyzing them statically (LATERAL FORCE METHOD) and dynamically (RESPONSE SPECTRUM METHOD) using ETABS 2016 software, and comparing the results of base shear forces, displacements and vibration modes, in order to form a comprehensive understanding of the proper use of shear walls.
The report raises critical questions regarding the key factors of resisting seismic forces on similar structures, where rigidity or ductility can play opposing roles in the overall structure resistance.
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.
Using Finite Element Analysis (FEA), a comparison between
PushOver Analysis (POA) and Response Spectrum Analysis (RSA)
is done in this research to explore the application limits of POA on
the irregular frame buildings from reinforced concrete.the
comparison contains (failure mechanism, displacement, and
ductility).
This research includes analyzing and designing of high water
tanks using elastic method. Also, analyzing the structural
supporting system using the Second Equivalent Static Method, then
analysis by using Linear Dynamic Method - Response Spectra
M
ethod utilizing Sap2000 program and performing necessary
comparison.
This research discusses the exponential function of the explosion load and the pressure decay factor in this function (a). After that, four functions with four different values of the pressure decay factor are studied, and that is for the un-damped S
DOF system, where the equation of motion is formed and solved. Then, using MATLAB software for every function, the relationship between (Yst/Y(t)) and t/T is plotted, and that enables plotting the response spectrum for each one. Moreover, a comparison between the spectra of the last three functions with the first one that describes the triangular explosion load is drawn. This research has concluded that for a certain range of (a), it is possible, and with acceptable approximation, to use the spectra of triangular load, but beyond that it is better to use the spectra of exponential load.
