ﺗﻌﯿﯿﻦ ﺿﺮﯾﺐ رﻓﺘﺎر دﯾﻮار ﺑﺮﺷﯽ ﻓﻮﻻدي ﺑﺎ ورق ﻧﺎزك ﺑﻪ روش ﺗﺤﻠﯿﻞ دﯾﻨﺎﻣﯿﮑﯽ اﻓﺰاﯾﻨﺪه (IDA)

Specification of Response Modification Factor for Steel Plate Shear Wall by Incremental Dynamic Analysis Method (IDA)

اﻣﺮوزه ﺑﺎ ﮔﺴﺘﺮش روزاﻓﺰون ﺳﺎﺧﺖوﺳﺎزﻫﺎي ﺑﻠﻨﺪ ﺑﻪ ﻋﻨﻮان ﻧﻤﺎدي از ﭘﯿﺸﺮﻓﺖ، ﺿﺮورت اﻧﺘﺨﺎب ﺳﯿﺴﺘﻢﻫﺎي ﻣﻘﺎوم ﻣﻨﺎﺳﺐ ﺟﻬﺖ ﺗﺤﻤﻞ ﺑﺎرﻫﺎي ﻧﺎﺷﯽ از زﻟﺰﻟﻪ و ﺑﺎد ﺑﻪ ﺷﮑﻠﯽ ﺑﻬﯿﻨﻪ و ﺑﺎ ﺗﻮان ﺟﺬب اﻧﺮژي زﯾﺎد ﻣﻮرد ﺗﻮﺟﻪ ﻗﺮارﮔﺮﻓﺘﻪاﺳﺖ دﯾﻮارﺑﺮﺷﯽ ﻓﻮﻻدي ﺑﯿﺶ از ﭼﻬﺎر دﻫﻪ اﺳﺖ ﮐﻪ ﺑﻪ ﻋﻨﻮان ﯾﮏ ﺳﯿﺴﺘﻢ ﻣﻘﺎوم ﺟﺎﻧﺒﯽ ﮐﺎرآﻣﺪ ﻣﻮرد اﺳﺘﻔﺎده ﻗﺮارﮔﺮﻓﺘﻪاﺳﺖ. در اﯾﻦ ﻣﻘﺎﻟﻪ ﺿﺮﯾﺐ اﺿﺎﻓﻪ ﻣﻘﺎوﻣﺖ، ﺿﺮﯾﺐ ﺷﮑﻞﭘﺬﯾﺮي و ﺿﺮﯾﺐ رﻓﺘﺎر اﯾﻦ ﺳﯿﺴﺘﻢﻫﺎ ﻣﻮرد ﺑﺮرﺳﯽ ﻗﺮارﮔﺮﻓﺘﻪاﺳﺖ. ﺑﺪﯾﻦ ﻣﻨﻈﻮر ﻗﺎبﻫﺎي 15 ،7 و 30 ﻃﺒﻘﻪ ﮐﻪ داراي ﯾﮏ ﯾﺎ دو دﻫﺎﻧﻪي دﯾﻮارﺑﺮﺷﯽ ﻓﻮﻻدي ﻫﺴﺘﻨﺪ، ﺗﺤﺖ آﻧﺎﻟﯿﺰ اﺳﺘﺎﺗﯿﮑﯽ ﻏﯿﺮﺧﻄﯽ، آﻧﺎﻟﯿﺰ دﯾﻨﺎﻣﯿﮑﯽ ﺧﻄﯽ و آﻧﺎﻟﯿﺰ دﯾﻨﺎﻣﯿﮑﯽ اﻓﺰاﯾﻨﺪه )IDA( ﻗﺮار ﮔﺮﻓﺘﻪاﻧﺪ. ﺑﻪ ﻣﻨﻈﻮر ﻟﺤﺎظ ﮐﺮدن ﻋﺪم ﻗﻄﻌﯿﺖ ذاﺗﯽ ﻣﻮﺟﻮد در زﻟﺰﻟﻪ از ﺗﺤﻠﯿﻞ دﯾﻨﺎﻣﯿﮑﯽ اﻓﺰاﯾﺸﯽ اﺳﺘﻔﺎده ﺷﺪه و 7 رﮐﻮرد از زﻟﺰﻟﻪﻫﺎي ﺷﺪﯾﺪي ﮐﻪ ﺗﺎﮐﻨﻮن رخ داده، اﻧﺘﺨﺎب ﮔﺮدﯾﺪهاﺳﺖ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ ﺿﺮﯾﺐ رﻓﺘﺎر اﯾﻦ ﺳﯿﺴﺘﻢ در ﺣﺎﻟﺖ ﺣﺪي ﺑﺮاي ﺳﺎزه ﻫﺎي ﺑﻠﻨﺪ ﺑﺮاﺑﺮ 8 و ﺑﺮاي ﺳﺎزهﻫﺎي ﮐﻮﺗﺎه و ﻣﯿﺎنﻣﺮﺗﺒﻪ در ﺣﺪود 9 ﻣﯽﺑﺎﺷﺪ.

Today, with the increasing spread of high constructions, as a development symbol, the need for selecting robust and suitable system for bearing optimally loads from earthquakes and wind and with high energy absorption power, has been significantly considered. Steel plate shear walls have been used over four decades as an efficient lateral resistance system. This paper analyzed the over strength factor, Ductility Factor and behavior factor of these system. For this, 7, 15 and 30 floors frames possessing one or two steel plate shear wall spans, have been analyzed in non-linear static, linear dynamic or increasingly dynamic analysis (IDA). For considering inherent uncertainty of earthquake, it was used of increasingly dynamic analysis and 7 records of the strongest earthquakes have been ever occurred were selected. The results showed that the behavior factor of this system in limit form for high construction is 8 and for short and middle construction is about 9.