Title of article :
Comparative Study on Structural Behavior of Reinforced Concrete Straight Beam and Beams with out Plane Parts
Author/Authors :
Mohsin, M.S Civil Engineering Department - College of Engineering - Babylon University, Iraq , Alwash, N.A Civil Engineering Department - College of Engineering - Babylon University, Iraq , Kadhum, M.M Civil Engineering Department - College of Engineering - Babylon University, Iraq
Abstract :
This paper aims to experimentally investigate and compare the structural behavior of reinforced concrete straight beam and other beams there made with one, two, and three out of plane parts. The study focused on the effect of the number and location of the out plane parts on the beams mid span deflection, and rotation, as well as the ductility index, cracking loads, and failure modes. Four beams were fabricated with a cross-sectional width of 150 mm and a depth of 200 mm, and 2000 mm in length. All the beams were made with normal strength concrete and constant longitudinal reinforcement ratio 0.011 for negative and positive moments. All the beam specimens were clamped by a special steel fixed ends and subjected to the two-point load up to their failure. The obtained results presented that the load bearing capacity of straight beam was higher than the beams with out of plane parts. Furthermore, the beam with two out of plane parts has capacity higher than the beams with one and three out of plane part by 5.86 and 55.07%, respectively. In addition, the results showed that the ductility increased with increasing number of out of plane parts by 5.52%, and 32.71% as copared with the beam with one out of plane part
Farsi abstract :
ﻫﺪف از اﯾﻦ ﻣﻘﺎﻟﻪ ﺑﺮرﺳﯽ و ﻣﻘﺎﯾﺴﻪ رﻓﺘﺎر ﺳﺎﺧﺘﺎري ﺗﯿﺮ ﻣﺴﺘﻘﯿﻢ ﺑﺘﻦ آرﻣﻪ و ﺳﺎﯾﺮ ﺗﯿﺮﻫﺎي ﺳﺎﺧﺘﻪ ﺷﺪه در آﻧﺠﺎ ﺑﺎ ﯾﮏ ، دو و ﺳﻪ ﻗﺴﻤﺖ ﺧﺎرج ﺻﻔﺤﻪ اﺳﺖ. اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﺑﺮ روي ﺗﺄﺛﯿﺮ ﺗﻌﺪاد و ﻣﺤﻞ ﻗﻄﻌﺎت ﺻﻔﺤﻪ ﺧﺎرج ﺑﺮ روي اﻧﺤﺮاف و ﺑﺎزﺗﺎب دﻫﺎﻧﻪ ﻣﯿﺎﻧﻪ ﺗﯿﺮﻫﺎ ، و ﻫﻤﭽﻨﯿﻦ ﺷﺎﺧﺺ ﺷﮑﻞ ﭘﺬﯾﺮي ، ﺑﺎرﻫﺎي ﺗﺮك ﺧﻮردﮔﯽ و ﺣﺎﻟﺖ ﻫﺎي ﺧﺮاﺑﯽ ﻣﺘﻤﺮﮐﺰ ﺷﺪه اﺳﺖ. ﭼﻬﺎر ﺗﯿﺮ ﺑﺎ ﻋﺮض ﻣﻘﻄﻊ 150 ﻣﯿﻠﯽ ﻣﺘﺮ و ﻋﻤﻖ 200 ﻣﯿﻠﯽ ﻣﺘﺮ و ﻃﻮل 2 ﻣﺘﺮ ﺳﺎﺧﺘﻪ ﺷﺪه اﺳﺖ. ﺗﻤﺎم ﺗﯿﺮﻫﺎ ﺑﺎ ﺑﺘﻦ ﺑﺎ ﻣﻘﺎوﻣﺖ ﻧﺮﻣﺎل و ﻧﺴﺒﺖ ﺗﻘﻮﯾﺖ ﻃﻮﻟﯽ ﺛﺎﺑﺖ 0.011 ﺑﺮاي ﮔﺸﺘﺎورﻫﺎي ﻣﻨﻔﯽ و ﻣﺜﺒﺖ ﺳﺎﺧﺘﻪ ﺷﺪه اﻧﺪ. ﺗﻤﺎم ﻧﻤﻮﻧﻪ ﻫﺎي ﭘﺮﺗﻮ ﺗﻮﺳﻂ اﻧﺘﻬﺎي ﺛﺎﺑﺖ ﻓﻮﻻدي ﮔﯿﺮ ﺷﺪه و ﺗﺤﺖ ﺷﮑﺴﺖ دو ﻧﻘﻄﻪ اي ﻗﺮار ﮔﺮﻓﺘﻨﺪ. ﻧﺘﺎﯾﺞ ﺑﻪ دﺳﺖ آﻣﺪه ﻧﺸﺎن داد ﮐﻪ ﻇﺮﻓﯿﺖ ﺗﺤﻤﻞ ﺑﺎر ﺗﯿﺮ ﻣﺴﺘﻘﯿﻢ ﺑﯿﺸﺘﺮ از ﺗﯿﺮﻫﺎي ﺧﺎرج از ﻗﻄﻌﺎت ﺻﻔﺤﻪ اﺳﺖ. ﺑﻌﻼوه ، ﭘﺮﺗﻮي داراي دو ﻗﺴﻤﺖ از ﺻﻔﺤﻪ داراي ﻇﺮﻓﯿﺖ ﺑﺎﻻﺗﺮ از ﭘﺮﺗﻮﻫﺎي داراي ﯾﮏ و ﺳﻪ ﻗﺴﻤﺖ از ﺻﻔﺤﻪ ﺑﻪ ﺗﺮﺗﯿﺐ 5.86 و 55.07 اﺳﺖ. ﻋﻼوه ﺑﺮ اﯾﻦ ، ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﮐﻪ اﻧﻌﻄﺎف ﭘﺬﯾﺮي ﺑﺎ اﻓﺰاﯾﺶ ﺗﻌﺪاد ﻗﻄﻌﺎت ﺧﺎرج ﺻﻔﺤﻪ 5.52 و 32.71 در ﻣﻘﺎﯾﺴﻪ ﺑﺎ ﭘﺮﺗﻮ ﺑﺎ ﻗﺴﻤﺖ ﺧﺎرج ﺻﻔﺤﻪ اﻓﺰاﯾﺶ ﻣﯽ ﯾﺎﺑﺪ .
Keywords :
Concrete Beams , Out of Plane Part , Normal Strength Concrete , Angle of Twist , Ductility index , cracking loads , Failure modes
Journal title :
International Journal of Engineering
