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Register a new userUsing of Nonlinear Static Analysis (Pushover) in Assessment of Ductility Factor for Reinforced Concrete Warehouses
استخدام التحليل الستاتيكي اللاخطي (Pushover) في تقييم عامل تعديل الاستجابة الزّلزاليّة للمخازن الخرسانيّة المسلّحة
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داليا نجار( باحث )
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تمّ في هذا البحث و باستخدام التحليل الستاتيكي اللاخطي Pushover دراسة و تحليل عدّة نماذج من هذه المخازن.
In the study, it was customary to consider each column in the building as a cantilevered element in resisting the lateral loads.
References used
ATC, 1996 - Seismic Evaluation and Retrofit of Concrete Buildings, Applied Technology Council, Volume 1, California, 346
ETABS, 2009 - Integrated Building Design Software, Vergin 9.7, Computers and Structures, INC, Univ.Avenue, 3rd ed, Berkely, California, USA
FEMA 274, 1997 - NEHRP Commentary on the Guidelines for the Seismic Rehabilitation of Buildings , the Applied Technology Council with funding from the Federal Emergency Management Agency, Washington
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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 paper presents the results of analyzing 17 models with
nonlinear static analysis. The models are 5, 10 and 15-story framewall
structures with Re-entrant corners. The participations of frames
to resist the shear force range between 25% and 60%
.
This study has provided an accurate description of the traditional nonlinear
static analysis and modal pushover analysis and then these two analyzes
applied for a set of concrete buildings.
In this paper the effect of the distinctive properties of Shape Memory Alloy (SMA)
―the ability to undergo large deformation and restore it after stress removal‖ has been
studied to see to what degree it may affect the structural performance of mul
ti-storey tall
buildings.
Using ANSYS software, two 3D Finite Element (FE) models are built for a
composite multi-storey building (20 story) which is resistant to lateral loads by bracing
system. One of them is with steel bracing and the other is with SMA bracing. Both models
take into account nonlinear material properties of elements and geometric nonlinearity.
The model with SMA material shows improved performance compared with the
model of steel bracing in terms of residual deformations and ductile performance.
Bridges are important and vital structures that provide communication between
different regions. Due to their importance, their design has had a great attention throughout
the world, as evidenced by the continuous development of seismic design code
s such as
AASHTO, which now adopts the performance-based design, and requires through a set of
requirements and criteria that the bridge performance under the design earthquake is at life
safety (LS) level and thus ensures that it does not collapse. Since most of the local bridges
were built at periods where these criteria were not adopted, it is important to verify their
performance and that they meet these criteria.
In this paper, the seismic performance of an existing bridge, which represents a model
for a wide range of local multi-span simply supported bridges, was evaluated by
developing a 3D model of the bridge using SAP2000V19.1 and applying the nonlinear
static analysis. The results of analysis have been used to verify that the bridge meets the
AASHTO seismic requirements, which include the check of the P-Δ requirement,
displacement demand/ capacity, members (columns) ductility, as well as the check of the
shear demand/capacity of the columns.
The results showed that the performance of the studied bridge under the seismic
intensities adopted in the Syrian code achives the acceptable level which is life safity (LS),
but it exceeds this level under high seismic intensity. The research also showed that there is
compatibility between the results of nonlinear static analysis and AASHTO requirements.
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