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Register a new userEvaluation of Modal Pushover Analysis for R.C. Structures
تقييم التحليل الستاتيكي اللامرن النمطي للأبنية البيتونية المسلحة
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Aِl-Baath University ورقة بحثية
Publication date
2016
fields
Structural Engineering
and research's language is
العربية
Created by
Shamra Editor
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قدمت هذه الدراسة وصفا دقيقا لطريقتي التحليل الستاتيكي اللامرنة التقليدية و النمطية, و من ثم تطبيق هذين التحليلين على مجموعة من الأبنية البيتونية المسلحة.
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.
References used
Code, U.B. UBC97. in Structural engineering design provisions. International conference of building officials, Whittier, California. 1997
Krawinkler, H. and Seneviratna, G.D. (1998) Pros and cons of pushover analysis of seismic performance evaluation, Engineering Structures, Vol. 20, No.4-6, pp. 452-464
Jankowiak, T. and T. Lodygowski, Identification of parameters of concrete damage plasticity constitutive model. Foundations of civil and environmental engineering, 2005. 6(1): p. 53-69
rate research
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Recently, the methods and theories of the structural and technicalevaluation for
cracked buildings have been developed because of different reasons (Natural disasters,
wars, the oldness… etc.) That was due to urgent need for right evaluation proces
s,
understand the structural and function status of the building and make the right decision.
The research includes the clarification of the importance of building structural
evaluation in addition to the basis and criteria of cracked buildings classification regarding
their structural and technical status.
The structural and technical evaluation for concrete building is considered as nonrepetitive
unique process, which has its particularity due to its link with large group of
indicators ( concrete natural and structure- structural system - the natural and intensity of
failures and cracks …etc.) Therefore, the evaluation process based on groups of
measurements, tests and views. The personal experience of the engineer has an important
role at evaluation process.
The research includes the preparation of scientific methodology to evolution process
and designing structural and technical evaluation software to evaluate cracked buildings
and limit the personal and mood role of the engineer during evaluation process. In addition
to that, the software will include applications from the real situations.
Pushover method or method of nonlinear static analysis is considered the latest and best way to study and evaluate the buildings under effect of seismic load. The method is based on the study of deformation occurring in the building, formation of pl
astic hinge in elements, in addition to the redistribution of internal forces in building elements under the effect of earthquake loads. Pushover method was applied to evaluate the Model of residential buildings in Latakia suburb Tabiyat, who has designed and implemented before the issuance of the code which earthquake load considered.
First, the dynamic characteristics of the building (Period, and Mode shape) were identified in the cases of modeling 2D (plane) and 3D (spatial). Second, an analysis of the building under earthquake load by Pushover method depending on ETABS Program was conducted. We have got seven side cases push of the building, and have identified the location of plastic hinge in the building elements, and draw a curved capacity for the building, which represents the relationship between base shear force and lateral deflection at the top of the building. It was concluded that the building is a good resistance to the effect of earthquake.
It was concluded with backing the adoption of Pushover method to evaluate existing buildings, and study the dynamic behavior, and the extent of resistance to the effect of earthquake.
In the study, it was customary to consider
each column in the building as a cantilevered element in resisting
the lateral loads.
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 studies the behavior of the soft story in RC structures using
static analysis and dynamic analysis, where studying models of RC
structures containing soft story where this story results from increased
hieght of story than the rest st
orys, was conducted static analysis using
Nonliner pushover analysis and dynamic analysis using Nonliner time
history analysis
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