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در اﯾﻦ ﺗﺤﻘﯿﻖ رﻓﺘﺎر ﻟﺮزهای و اﺗﻼف اﻧﺮژی اﺗﺼﺎل ﺗﯿﺮ ﻓﻮﻻدی ﺑﻪ ﺳﺘﻮن ﺑﺘﻦ ﻣﺴﻠﺢ ﺑﺎ ﻟﻮﻟﻪﻫﺎی ﻓﻮﻻدی دو ﭘﻮﺳﺘﻪ ﺑﺎ اﺳﺘﻔﺎده از روشﻫﺎی ﻋﺪدی ﺑﺮرﺳﯽ ﺷﺪه اﺳﺖ. اﯾﻦ ﺳﯿﺴﺘﻢ رﻓﺘﺎر ﻫﯿﺴﺘﺮزﯾﺲ و ﻋﻤﻠﮑﺮد ﺗﯿﺮﻫﺎی ﻓﻮﻻدی ﺳﻨﺘﯽ ﺑﻪ اﺗﺼﺎل ﺳﺘﻮن ﺑﺘﻦ ﻣﺴﻠﺢ را ﺑﻬﺒﻮد ﻣﯽ ﺑﺨﺸﺪ. ﺑﺮای ارزﯾﺎﺑﯽ رﻓﺘﺎر ﻫﯿﺴﺘﺮزﯾﺲ ﺗﯿﺮ ﻓﻮﻻدی و ﺟﺬب اﻧﺮژی ﺑﻪ اﺗﺼﺎل ﺳﺘﻮن ﺑﺘﻦ ﻣﺴﻠﺢ ﺑﺎ ﺳﯿﺴﺘﻢ ﻟﻮﻟﻪای ﻓﻮﻻدی دو ﭘﻮﺳﺘﻪ، ﻣﻄﺎﻟﻌﺎت ﭘﺎراﻣﺘﺮﯾﮏ اﻧﺠﺎم ﺷﺪ. ﻣﻄﺎﻟﻌﺎت ﭘﺎراﻣﺘﺮی ﺑﺎ اﺳﺘﻔﺎده از روش اﻟﻤﺎن ﻣﺤﺪود ﻏﯿﺮﺧﻄﯽ ﺑﺮای ﺑﺮرﺳﯽ ﻣﺪلﻫﺎی ﺑﻬﺒﻮدﯾﺎﻓﺘﻪ اﻧﺠﺎم ﺷﺪه اﺳﺖ. ﻣﻄﺎﻟﻌﺎت ﭘﺎراﻣﺘﺮﯾﮏ ﺷﺎﻣﻞ ﺑﺮرﺳﯽ ﭘﺎراﻣﺘﺮﻫﺎی ﺿﺨﺎﻣﺖ و ﺷﮑﻞ ﻣﻘﻄﻊ ﯾﮏ ﻟﻮﻟﻪ داﺧﻠﯽ اﺳﺖ. ﻫﻤﭽﻨﯿﻦ، دﻗﺖ ﻣﺪلﻫﺎی اﺟﺰای ﻣﺤﺪود ﺑﺎ ﻣﻘﺎﯾﺴﻪ ﻧﺘﺎﯾﺞ آزﻣﻮن ﮐﻪ دﻗﺖ ﺧﻮب ﻣﺪلﻫﺎی اﺟﺰای ﻣﺤﺪود را در ﭘﯿﺶﺑﯿﻨﯽ رﻓﺘﺎر ﭘﺴﻤﺎﻧﺪ و ﺣﺎﻟﺖﻫﺎی ﺷﮑﺴﺖ ﻧﻤﻮﻧﻪﻫﺎ ﻧﺸﺎن ﻣﯽدﻫﺪ، ﻣﻮرد ارزﯾﺎﺑﯽ ﻗﺮار ﮔﺮﻓﺖ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ ﺿﺨﺎﻣﺖ ﻟﻮﻟﻪ داﺧﻠﯽ ﻣﺪلﻫﺎی ﺑﻬﺒﻮدﯾﺎﻓﺘﻪ ﺗﺄﺛﯿﺮ ﻗﺎﺑﻞﺗﻮﺟﻬﯽ ﺑﺮ ﺗﻌﯿﯿﻦ ﻇﺮﻓﯿﺖ ﻧﻬﺎﯾﯽ، ﻋﻤﻠﮑﺮد و اﺗﻼف اﻧﺮژی دارد. ﻫﻤﭽﻨﯿﻦ، ﻧﺘﺎﯾﺞ ﻧﺸﺎن ﻣﯽدﻫﺪ ﮐﻪ ﺟﺰﺋﯿﺎت ﺳﺎﺧﺖ ﻟﻮﻟﻪ داﺧﻠﯽ ﺗﺄﺛﯿﺮ ﻗﺎﺑﻞﺗﻮﺟﻬﯽ ﺑﺮ ﻋﻤﻠﮑﺮد و رﻓﺘﺎر ﭘﺴﻤﺎﻧﺪ اﺗﺼﺎل ﺗﯿﺮ ﻓﻮﻻدی ﺑﻪ ﺳﺘﻮن ﺑﺘﻦ ﻣﺴﻠﺢ ﺑﺎ ﻟﻮﻟﻪﻫﺎی ﻓﻮﻻدی دو ﭘﻮﺳﺘﻪ داﺷﺘﻪ اﺳﺖ.

investigation of cyclic behavior and performance of steel beam to a reinforced concrete column with double-skin steel tubular

the use of steel beam connection system to reinforced concrete columns has been used as an alternative to steel bending frames in medium and high rise buildings. in high rise buildings, because the rigidity of the structure controls the design, the use of concrete columns with more rigidity compared to steel columns makes the design economical. in this study, the seismic behavior and energy dissipation of steel beam to reinforced concrete column connection with double skin steel tubular are investigated using numerical methods. this system improves the hysteresis behavior and performance of traditional steel beams to reinforced concrete column connection. to evaluate the steel beam’s hysteresis behavior and energy absorption to reinforced concrete column connection with double skin steel tubular system, parametric studies were performed. parametric studies have been performed applying the nonlinear finite element (mfe) procedure to investigate the improved models. the parametric studies comprise examining the parameters of thickness and cross section shape of an inner tube. also, the accuracy of finite element models was evaluated by comparing test results that showed the good accuracy of finite element models in predicting the specimens’ hysteresis behavior and failure modes. the results indicated that the thickness of the inner tube of improved models has a considerable influence on determining the ultimate capacity, performance, and energy dissipation. also, the results show that the details of the construction of the internal tube were a considerable effect on the performance and hysteresis behavior of steel beam to reinforced concrete column connection with double skin steel tubular.