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تصفح المحتوي RDA
التصفح حسب الموضوعات
التصفح حسب اللغة
التصفح حسب الناشر
التصفح حسب تاريخ النشر
التصفح حسب مكان النشر
التصفح حسب المؤلفين
تصفح الهيئات
التصفح المؤتمرات
التصفح حسب نوع المادة
التصفح حسب العلاقة بالعمل
تم العثور علي : 3829
 تم العثور علي : 3829
  
 
إعادة البحث

Thesis 2022.
First and foremost - I thank Allah - for all his blessings and for giving me this opportunity to carry on this work - helping me and for giving me the strength and faith to accomplish.
I would like to express my sincere gratitude and appreciation to my supervisors
- whose guidance and support allowed the accomplishment of this research. I really have been fortunate to be able to benefit from their experience and remarkable influence during through the whole work.
I owe my deepest recognition and sincere gratitude to Prof. Kamal M. Ismail for his invaluable guidance
- precious advice - detailed and constructive comments - his generous - time and effort throughout all the stages of conducting this thesis.
Special and deepest thanks go to Prof. Waleed H.Elkamash and Assoc. Prof. Azza Hassan Moubark
- who helped me to complete this thesis as well as they gave me the tool that helps me in my application - thanks for their extensive discussions - detailed review and continuous encouragement.
A lot of thanks to my brothers Assoc. Prof. Eyad Oda and Assoc. Prof. Ahmed Salem for their guides to finalizes my research in suitable duration and helping me to remove all obstructions met me during the research trip.
Last
- but not least - I deeply thank my Family for giving hope - listening and supporting - without their encouragement and constant guidance I could not have finished this thesis - First and foremost - I thank Allah - for all his blessings and for giving me this opportunity to carry on this work - helping me and for giving me the strength and faith to accomplish.
I would like to express my sincere gratitude and appreciation to my supervisors
- whose guidance and support allowed the accomplishment of this research. I really have been fortunate to be able to benefit from their experience and remarkable influence during through the whole work.
I owe my deepest recognition and sincere gratitude to Prof. Kamal M. Ismail for his invaluable guidance
- precious advice - detailed and constructive comments - his generous - time and effort throughout all the stages of conducting this thesis.
Special and deepest thanks go to Prof. Waleed H.Elkamash and Assoc. Prof. Azza Hassan Moubark
- who helped me to complete this thesis as well as they gave me the tool that helps me in my application - thanks for their extensive discussions - detailed review and continuous encouragement.
A lot of thanks to my brothers Assoc. Prof. Eyad Oda and Assoc. Prof. Ahmed Salem for their guides to finalizes my research in suitable duration and helping me to remove all obstructions met me during the research trip.
Last
- but not least - I deeply thank my Family for giving hope - listening and supporting - without their encouragement and constant guidance I could not have finished this thesis

Thesis 2024.
تم إجراء دراسة رقمية لدراسة تأثير الخزانات كمثبطات لمقاومة الاستجابة الزلزالية للهياكل. يتكون النموذج الهيكلي للمبنى من 30 طابق مزودة بخزانات TLD مستطيلة مستخدمه لهذا الغرض. تركز هذه الدراسة على استخدام النموذج الرياضي لخزان المياه لتوفير نفس التأثير على الهيكل الأساسي مثل TLD.‏
تم استخدام برنامج ETABS V19.1.0 (2019) لنموذج الهيكل. تم تقديم دراسة تحليل سجلات الوقت الخطي في هذه الدراسة، حيث تعرض المبنى إلى ثلاث نماذج زلزال تاريخية مختلفة وهي ELCENTRO‏ وSMONICA و LACNORTH. بالنسبة لكل نموذج زلزال، تم حل النموذج الرياضي مع الأخذ في الاعتبار المعاملات التالية، مكان الخزانات، نسبة الكتلة (μ) وهي نسبة الكتلة من المياه في الخزانات إلى كتلة الهيكل، عدد الخزانات المستخدمة واتجاه حركة الزلازل.
وضعت الخزانات في الجزء العلوي من الهيكل، عند 40٪ من الارتفاع الهيكلي، وفي الأعلى إلى جانب 40٪ من الارتفاع الهيكلي. تم استخدام نسب كتل مختلفة بدءا من 1.5٪ إلى 4.5٪. تختلف عدد الخزانات وفقا للنسبة المطلوبة للكتلة المرغوبة. تم حل الهياكل في الاتجاهات x و y.‏
ظهرت افضل نتائج عند استخدام خزانات المياه مع نسبة الكتلة التي تبلغ 2.5٪ بحيث يتم وضعها في الجزء العلوي بالإضافة الى وضع خزانات اضافية عند الارتفاع المقدر بنسبة 40٪ من الارتفاع الهيكلي. أدى ذلك إلى تحسين السلوك الزلزالي للهيكل وتقليل تأثير القوات الزلزالية إلى حوالي 35٪.




ABSTRACT
In light of the recent changes in seismic behavior in regions
- it has become necessary to study the seismic response of the structures and to reduce the effects of these earthquakes using economical and innovative methods. One of these methods is the establishment of dampers to minimize the excitation of the structure due to earthquake forces - tuned liquid dampers (TLDs) are one of these techniques.
A numerical study has been performed to study the effect of Tuned Liquid Damper to resist the seismic response of structures. A structural model of a high-rise building consists of 30 stories equipped with rectangular TLDs has been used for this purpose. This study focuses on using the mathematical model of the water tank to provide the same effect on the primary structure as the TLD.
The software ETABS V19.1.0 (2019) is used to model the structure. A linear time history analysis study is presented in this study
- with the building subjected to three different historical earthquake models which are ELCENTRO - SMONICA - and LACNORTH. For each earthquake model the numerical model is solved taking into consideration the following parameters - the location of tanks - the mass ratio (μ) referring to percentage of mass of water in tanks to the mass of structure - the number of tanks used and the direction of motion of the seismic response.
Tanks were placed at the top of the structure
- at 40% of structural height - and at top coupled with another tank at 40% of structural height. Different mass ratios were used starting from 1.5% to 4.5%. The number of tanks varied according to the desired mass ratio to be obtained. The structures were solved in both x and y directions.
Usage of tuned water tanks with a mass ratio of 2.5% placed at the top coupled with tanks at 40% of the structural height enhanced the seismic behavior of the structure and reduced the effect of the seismic forces up to about 35%
- تم إجراء دراسة رقمية لدراسة تأثير الخزانات كمثبطات لمقاومة الاستجابة الزلزالية للهياكل. يتكون النموذج الهيكلي للمبنى من 30 طابق مزودة بخزانات TLD مستطيلة مستخدمه لهذا الغرض. تركز هذه الدراسة على استخدام النموذج الرياضي لخزان المياه لتوفير نفس التأثير على الهيكل الأساسي مثل TLD.‏
تم استخدام برنامج ETABS V19.1.0 (2019) لنموذج الهيكل. تم تقديم دراسة تحليل سجلات الوقت الخطي في هذه الدراسة، حيث تعرض المبنى إلى ثلاث نماذج زلزال تاريخية مختلفة وهي ELCENTRO‏ وSMONICA و LACNORTH. بالنسبة لكل نموذج زلزال، تم حل النموذج الرياضي مع الأخذ في الاعتبار المعاملات التالية، مكان الخزانات، نسبة الكتلة (μ) وهي نسبة الكتلة من المياه في الخزانات إلى كتلة الهيكل، عدد الخزانات المستخدمة واتجاه حركة الزلازل.
وضعت الخزانات في الجزء العلوي من الهيكل، عند 40٪ من الارتفاع الهيكلي، وفي الأعلى إلى جانب 40٪ من الارتفاع الهيكلي. تم استخدام نسب كتل مختلفة بدءا من 1.5٪ إلى 4.5٪. تختلف عدد الخزانات وفقا للنسبة المطلوبة للكتلة المرغوبة. تم حل الهياكل في الاتجاهات x و y.‏
ظهرت افضل نتائج عند استخدام خزانات المياه مع نسبة الكتلة التي تبلغ 2.5٪ بحيث يتم وضعها في الجزء العلوي بالإضافة الى وضع خزانات اضافية عند الارتفاع المقدر بنسبة 40٪ من الارتفاع الهيكلي. أدى ذلك إلى تحسين السلوك الزلزالي للهيكل وتقليل تأثير القوات الزلزالية إلى حوالي 35٪.




ABSTRACT
In light of the recent changes in seismic behavior in regions
- it has become necessary to study the seismic response of the structures and to reduce the effects of these earthquakes using economical and innovative methods. One of these methods is the establishment of dampers to minimize the excitation of the structure due to earthquake forces - tuned liquid dampers (TLDs) are one of these techniques.
A numerical study has been performed to study the effect of Tuned Liquid Damper to resist the seismic response of structures. A structural model of a high-rise building consists of 30 stories equipped with rectangular TLDs has been used for this purpose. This study focuses on using the mathematical model of the water tank to provide the same effect on the primary structure as the TLD.
The software ETABS V19.1.0 (2019) is used to model the structure. A linear time history analysis study is presented in this study
- with the building subjected to three different historical earthquake models which are ELCENTRO - SMONICA - and LACNORTH. For each earthquake model the numerical model is solved taking into consideration the following parameters - the location of tanks - the mass ratio (μ) referring to percentage of mass of water in tanks to the mass of structure - the number of tanks used and the direction of motion of the seismic response.
Tanks were placed at the top of the structure
- at 40% of structural height - and at top coupled with another tank at 40% of structural height. Different mass ratios were used starting from 1.5% to 4.5%. The number of tanks varied according to the desired mass ratio to be obtained. The structures were solved in both x and y directions.
Usage of tuned water tanks with a mass ratio of 2.5% placed at the top coupled with tanks at 40% of the structural height enhanced the seismic behavior of the structure and reduced the effect of the seismic forces up to about 35%

Thesis 2023.

Thesis 2023.

Book 1993.
ISBN: 9772740168

Thesis 2023.

Thesis 2023.

Thesis 2024

Thesis 2024.

Thesis 2024.


من 383
 







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