بررسی عملکرد لرزه ای سدهای بتنی وزنی با استفاده از تحلیل بار افزون

نویسندگان
1 دانشگاه تربیت مدرس
2 دانشگاه آزاد اسلامی واحد دماوند
چکیده
نیاز روز افزون به منابع آبی وانرژی پاک جوامع بشری را بر آن داشته تا با تحقیقات و مطالعات گسترده فناوری های قدیمی را بهینه سازی کنند تا بیشترین بهره ممکن را از آنها ببرند. یکی از این اختراعات سد ها هستند، سازه هایی که بر روی رودها ایجاد می شود. در گذشته ایجاد سدها عمومآ با هدف تامین آب آشامیدنی و آبیاری مزارع بوده اما امروزه نه تنها تامین کننده مصارف آبی است بلکه در ایجاد انرژی الکتریکی نیز مورد استفاده قرار می گیرند. در بسیاری از مطالعات، برای ارزیابی آسیب پذیری و میزان صدمه دیدن سدها در هنگام وقوع زلزله از تحلیل دینامیکی استفاده می شود. علیرغم دقیق بودن این روش، عدم قطعیت های فراوانی در مراحل تحلیل وجود دارد که باعث هزینه بر بودن و طولانی شدن مطالعات می شود. از این رو محققان با بکار گیری روش تحلیل استاتیکی غیر خطی سرعت تحلیل را بالا برده و هزینه ها را کاهش دادند. هدف تحقیق حاضر، بررسی عملکرد لرزه ای سدهای بتنی وزنی با استفاده از تحلیل استاتیکی غیرخطی (بار افزون) است. بدین منظور الگوهای بار مورد استفاده در تحلیل بار افرون در دو جهت بالادست و پایین دست به سازه سد اعمال می گردد و مشاهدات نشان دهنده آن است که به غیر از الگوی بار مستطیلی تمامی الگوی های بار مورد استفاده در این تحقیق بطور مناسبی می توانند راستای ترک را در بدنه سد به درستی تشخیص دهند.

کلیدواژه‌ها

موضوعات


عنوان مقاله English

Investigation of Seismic Performance of Concrete Gravity Dams using Pushover Analysis

نویسندگان English

Mohammad Alembagheri 1
Hossein Behzadnasab 2
1 Tarbiat Modares University
2 Islamic Azad University
چکیده English

The increasing need for clean water and energy resources for human societies has led them to optimize the old technologies with the best in research and studies to make the most of them. One of these inventions is dams, structures that are created on the rivers. In the past, the creation of dams was generally aimed at providing drinking water and irrigation of farms, but nowadays it is not only a source of water, but also electric energy. In many studies, dynamic analysis is used to assess the vulnerability and damage damages during an earthquake. Despite the precision of this method, there are many uncertainties in the analysis stages that make the study costly and prolonged. Therefore, using nonlinear static analysis method, researchers increased the speed of analysis and reduced costs. The purpose of this study is to investigate the seismic performance of concrete gravity dams using nonlinear static analysis (pushover analysis). For this purpose, load patterns used in the pushover analysis are applied in both directions upstream and downstream of the dam structure. Observations show that, apart from the rectangular load pattern, all load patterns used in this research can adequately correlate Detect the crack in the dam body correctly. The increasing need for clean water and energy resources for human societies has led them to optimize the old technologies with the best in research and studies to make the most of them. One of these inventions is dams, structures that are created on the rivers. In the past, the creation of dams was generally aimed at providing drinking water and irrigation of farms, but nowadays it is not only a source of water, but also electric energy. In many studies, dynamic analysis is used to assess the vulnerability and damage damages during an earthquake. Despite the precision of this method, there are many uncertainties in the analysis stages that make the study costly and prolonged. Therefore, using nonlinear static analysis method, researchers increased the speed of analysis and reduced costs. The purpose of this study is to investigate the seismic performance of concrete gravity dams using nonlinear static analysis (pushover analysis). For this purpose, load patterns used in the pushover analysis are applied in both directions upstream and downstream of the dam structure. Observations show that, apart from the rectangular load pattern, all load patterns used in this research can adequately correlate Detect the crack in the dam body correctly. The increasing need for clean water and energy resources for human societies has led them to optimize the old technologies with the best in research and studies to make the most of them. One of these inventions is dams, structures that are created on the rivers. In the past, the creation of dams was generally aimed at providing drinking water and irrigation of farms, but nowadays it is not only a source of water, but also electric energy. In many studies, dynamic analysis is used to assess the vulnerability and damage damages during an earthquake. Despite the precision of this method, there are many uncertainties in the analysis stages that make the study costly and prolonged. Therefore, using nonlinear static analysis method, researchers increased the speed of analysis and reduced costs. The purpose of this study is to investigate the seismic performance of concrete gravity dams using nonlinear static analysis (pushover analysis). For this purpose, load patterns used in the pushover analysis are applied in both directions upstream and downstream of the dam structure. Observations show that, apart from the rectangular load pattern, all load patterns used in this research can adequately correlate Detect the crack in the dam body correctly.

کلیدواژه‌ها English

Dam
Seismic Performance
pushover analysis
load patter