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

در ﺑﺴﯿﺎری از ﻣﻄﺎﻟﻌﺎت، ﺑﺮای ارزﯾﺎﺑﯽ آﺳﯿﺐ ﭘﺬﯾﺮی و ﻣﯿﺰان ﺻﺪﻣﻪ دﯾﺪن ﺳﺪﻫﺎ در ﻫﻨﮕﺎم وﻗﻮع زﻟﺰﻟﻪ از ﺗﺤﻠﯿﻞ دﯾﻨﺎﻣﯿﮑﯽ اﺳﺘﻔﺎده ﻣﯽ ﺷﻮد. ﺑﺎ وﺟﻮد 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 ﭘﮋوﻫﺸﮕﺮان ﺑﺎ ﺑﮑﺎرﮔﯿﺮی روش ﺗﺤﻠﯿﻞ اﺳﺘﺎﺗﯿﮑﯽ ﻏﯿﺮﺧﻄﯽ ﺳﺮﻋﺖ ﺗﺤﻠﯿﻞ را ﺑﺎﻻ ﺑﺮده و ﻫﺰﯾﻨﻪ ﻫﺎ را ﮐﺎﻫﺶ دادﻧﺪ. ﻫﺪف اﯾﻦ ﭘﮋوﻫﺶ ﺑﺮرﺳﯽ ﻋﻤﻠﮑﺮد ﻟﺮزه ای ﺳﺪﻫﺎی ﺑﺘﻨﯽ وزﻧﯽ ﺑﺎ اﺳﺘﻔﺎده از ﺗﺤﻠﯿﻞ اﺳﺘﺎﺗﯿﮑﯽ ﻏﯿﺮﺧﻄﯽ )ﺑﺎر اﻓﺰون( اﺳﺖ. ﺑﺪﯾﻦ ﻣﻨﻈﻮر در ﮔﺎم اوﻟﯿﻪ اﯾﻦ ﭘﮋوﻫﺶ ﺑﻪ ﺑﺮرﺳﯽ ﺟﺎﻣﻊ اﻟﮕﻮﻫﺎی ﺑﺎر ﺗﺤﻠﯿﻞ ﺑﺎر اﻓﺰون و ﻫﻤﭽﻨﯿﻦ ﻧﻘﺎط ﻗﻮت و ﺿﻌﻒ ﺗﺤﻘﯿﻘﺎت ﮔﺬﺷﺘﻪ ﭘﺮداﺧﺘﻪ ﻣﯽ ﺷﻮد ﺑﺎ ﺗﻮﺟﻪ ﺑﻪ ﺑﺮرﺳﯽ ﮐﻪ روی اﻟﮕﻮﻫﺎی ﺑﺎر اﻧﺠﺎم ﺷﺪ ﻣﺸﺨﺺ ﺷﺪ در ﺗﺤﻠﯿﻞ ﻫﺎی اﺳﺘﺎﺗﯿﮑﯽ ﻏﯿﺮ ﺧﻄﯽ رواﺑﻂ ﻣﻮرد اﺳﺘﻔﺎده ﺑﺮای اﻟﮕﻮ ﻫﺎی ﺑﺎر ﻧﻘﺶ زﯾﺎدی در دﻗﺖ ﻧﺘﺎﯾﺞ دارد و ﻧﻤﯽ ﺗﻮان ﺗﻨﻬﺎ از ﯾﮏ اﻟﮕﻮی ﺑﺎر اﺳﺘﻔﺎده و ﻧﺘﺎﯾﺞ دﻗﯿﻘﯽ اﺳﺘﺨﺮاج ﻧﻤﻮد و ﺑﺮای دﺳﺘﯿﺎﺑﯽ ﺑﻪ دﻗﯿﻖ ﺗﺮﯾﻦ ﻧﺘﺎﯾﺞ ﺑﺎﯾﺪ ﭼﻨﺪﯾﻦ اﻟﮕﻮی ﺑﺎر در ﮐﻨﺎر ﻫﻢ اﺳﺘﻔﺎده ﺷﻮد. ﺑﺎ ﻣﻘﺎﯾﺴﻪ ای ﮐﻪ ﺑﯿﻦ ﭘﺮوﻓﯿﻞ ﻫﺎی ﺗﺮک اﯾﻦ ﺗﺤﻘﯿ ﻖ و ﭘﺮوﻓﯿﻞ ﻫﺎ ی ﺗﺮک ﺗﺤﻠﯿﻞ دﯾﻨﺎﻣ ﯿﮑﯽ ﻏﯿ ﺮ ﺧﻄ ﯽ ﺣﺎﺻﻞ از ﻣﻄﺎﻟﻌﻪ د ﯾﮕﺮ ﭘﮋوﻫﺸﮕﺮان اﻧﺠﺎم ﺷﺪ ﻧﺘﺎﯾﺞ ﻧﺸﺎن دﻫﻨﺪه آن اﺳﺖ ﮐﻪ اﻟﮕﻮﻫﺎی ﻣﺪی ﻣﺪ اول ﺳﺎزه و ﻣﺜﻠﺜﯽ واروﻧﻪ ﺷﺒﺎﻫﺖ ﺑﺴﯿﺎری ﺑﻪ ﭘﺮوﻓﯿﻞ ﻫﺎ ی ﺗﺮک ﺗﺤﻠ ﯿ ﻞ دﯾﻨﺎﻣﯿﮑﯽ ﻏﯿﺮ ﺧﻄﯽ ﺣﺎﺻﻞ از ﻣﻄﺎﻟﻌﻪ دﯾﮕﺮ ﭘﮋوﻫﺸﮕﺮان دارد و ﻫﻤﭽﻨﯿﻦ ﺑﻪ ﻏﯿﺮ از اﻟﮕﻮی ﺑﺎر ﻣﺴﺘﻄﯿﻠﯽ ﺗﻤﺎﻣﯽ اﻟﮕﻮی ﻫﺎی ﺑﺎر ﻣﻮرد اﺳﺘﻔﺎده در اﯾﻦ ﭘﮋوﻫﺶ ﺑﻄﻮر ﻣﻨﺎﺳﺒﯽ ﻣﯽ ﺗﻮاﻧﻨﺪ راﺳﺘﺎی ﺗﺮک را در ﺑﺪﻧﻪ ﺳﺪ ﺑﻪ درﺳﺘﯽ ﺗﺸﺨﯿﺺ دﻫﻨﺪ.

Investigation of Seismic Performance of Concrete Gravity Dams using Pushover Analysis

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.