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Register a new userChoosing The Optimal Solution in Modal Combination In Analysis Of High Water Tanks Using Response Spectra Method
اختيار الحل الأمثل في تجميع الأنماط في التحليل باستخدام طريقة طيف الاستجابة لخزانات المياه العالية
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يتضمن هذا البحث دراسة تحليل و تصميم أحد أنواع الخزانات العالية و ذلك بدراسة حلة الخزان وفق الطريقة المرنة و دراسة الجملة الحاملة للخزان باعتماد الطريقة الستاتيكية المكافئة الثانية و من ثم التحليل وفق الطريقة الديناميكية الخطية طريقة طيف الاستجابة و ذلك باستخدام برنامج SAP2000 و إجراء المقارنات اللازمة.
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 Method utilizing Sap2000 program and performing necessary comparison.
References used
(ACI 371R-98, American Concrete Institute, Guide to the Analysis Design and Construction of Concrete-pedestal Water Tower, 1995,345, N.O.P(36
(UBC-97, (Uniform Building Code) USA, 1997, N.O.P(469
(Livaoglu, R, Dogangun, A. Simplified Seismic analysis procedures for elevated tanks considering fluid-structure-soil interaction, Journal of Fluids and Structures, Vol.22, 2006, 421- 439, N.O.P(19
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In this research, a study of full tank case is carried out. The water
contained in the tank was modeled as two masses following the
recommendations of Eurocode.
: Nonlinear response history evaluation is becoming a practical tool due to availability of high performance computing and recommendations of the new seismic guidelines, and due to the increase of available strong ground motion database. When testing
the selected and scaled ground motions, it’s a standard procedure to use the time history analysis to validate the results in terms of structural responses and their variation. this proves the efficiency of the presented procedure.
In this study the selection and scaling criteria of real time history records to satisfy the Syrian design code are discussed. Ten set of records have been selected and scaled, every set consists of seven records of available real records, to match the Syrian design spectra. The resulting time histories are investigated and compared in terms of suitability as input to time history analysis of civil engineering structures, by mean of time history analyses of SDOF systems which are conducted to examine the efficiency of the scaling method in reducing the scatter in structural response. The nonlinear response of SDOF systems is represented by bilinear hysteretic model. Assuming 5 different Periods, α=3% post-yield stiffness, a number of 700 runs of analysis are conducted. And a number of 280 runs of analysis are conducted for MDOF systems.
Scientists nowadays increased their interest in artificial intelligence because
of the rapid development in the modern age. This development increased
the complexity of systems in order to consent society rapid needs in getting
systems of better r
eliability and high performance.
Artificial Intelligence solved many difficult and sticky problems.
We are going to define the genetic algorithms(GA) which is one of the
artificial intelligence branch because of its ability to solve many complex
problems in Different scientific aspects either in computer science[8] or
operational research and image processing[7] or social science[9].
In this essay, we used GA to find the maximum value of continuous function
within a limited rang to study the effect of some of the most important GA
parameters on the performance and accuracy of the results. We noticed the
effects of probability of mutation, population size and the number of the
repeated operations on the results accuracy and execution time in choosing
the Roulette Wheel Selection procedure. After that, we compare
between the Roulette Wheel procedure and the Elitism Selection procedure.
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.
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.
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