³í¹®¸í |
º¸ÀÇ À¯È¿±íÀÌ¿Í Àü´Üö±Ù°£°Ý¿¡ µû¸¥ ö±ÙÄÜÅ©¸®Æ®º¸ÀÇ Àü´Ü°µµ¿¡ °üÇÑ ¿¬±¸ / A Study on Shear Strength of Reinforced Concrete Beams according to Beam Effective Depth and Shear Reinforcement Spacing |
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À¯ÀαÙ(Yu, In-Geun) ; ¹Ú³ªÁ¤(Park, Na-Jeong) ; ¹é½Â¹Î(Baek, Seung-Min) ; ±è¿ì¼®(Kim, Woo-Suk) ; °ûÀ±±Ù(Kwak, Yoon-Keun) |
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´ëÇÑ°ÇÃàÇÐȸ³í¹®Áý, Vol.36 No.11 (2020-11) |
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½ÃÀÛÆäÀÌÁö(289) ÃÑÆäÀÌÁö(12) |
ÁÖÁ¦¾î |
Àü´Üö±Ùºñ; Å©±âÈ¿°ú; Àü´Ü°µµ ; Shear Reinforcement Ratio; Size Effect; Shear Strength |
¿ä¾à1 |
º» ¿¬±¸¿¡¼´Â º¸ÀÇ À¯È¿±íÀÌ¿Í Àü´Üö±Ù°£°Ý¿¡ µû¸¥ ö±ÙÄÜÅ©¸®Æ®º¸ÀÇ Àü´Ü°µµ¿¡ °üÇÑ ¿µÇâÀ» ºÐ¼®Çϱâ À§ÇØ ÀÎÀåö±Ùºñ(¥ñ=0.025), Æø ´ë ±íÀÌ ºñ(h/b=1.5)¿Í Àü´Ü°æ°£ºñ(a/d=2.5)¸¦ ÀÏÁ¤ÇÏ°Ô ÇÏ¿´°í, ´Ü¸éÀÇ Å©±â¿Í Àü´Üö±Ùºñ¸¦ º¯¼ö·Î ÇÏ¿© Àü´Ü½ÇÇèÀ» ÇÏ¿´´Ù. ½ÇÇè°á°ú¸¦ ºÐ¼®ÇÏ¿© ´ÙÀ½°ú °°Àº °á·ÐÀ» µµÃâÇÏ¿´´Ù. KBC2½ÄÀ» ±âÁØÀ¸·Î Àü´Üö±ÙÀ» ¹è±ÙÇÑ ½ÃÇèü¸¸À» ´ë»óÀ¸·Î ÇÑ °æ¿ì¿¡´Â, À̷аª¿¡ ´ëÇÑ ½ÇÇè°ªÀÇ ºñ°¡ 0.85 ~ 1.29·Î ³ªÅ¸³µ´Ù. ƯÈ÷, CSA ±âÁØ¿¡¼ ¿ä±¸ÇÏ´Â = 0.7d¿Í À¯»çÇÑ S=0.67d (d /s=1.5)ÀÎ °¢ ½Ã¸®Áî 2¹ø ½ÃÇèü(SH1-2, SH2-2, SH3-2)¿¡¼´Â 1.17 ~ 1.29·Î ³ªÅ¸³ª Àü´Üö±Ù¿¡ ´ëÇÑ ÇöÇà±âÁØ = d /2´Â ´Ù¼Ò ¿ÏȽÃÄѵµ µÉ °ÍÀ¸·Î ÆǴܵÇÁö¸¸, À̸¦ ±âÁØ¿¡ ¹Ý¿µÇϱâ À§Çؼ´Â Ãß°¡ÀûÀÎ ¿¬±¸°¡ ÇÊ¿äÇÏ´Ù. |
¿ä¾à2 |
Although many studies have been conducted on some factors (i.e., tensile reinforcement ratio, shear span-to-depth ratio, concrete compressive strength, and beam width-to-depth ratio) affecting the shear strength of concrete, studies on the effect of the cross-sectional size on the shear strength have not been achieved. For this reason, the purpose of this study is to conduct a study on the shear strength of reinforced concrete beams according to beam effective depth and shear reinforcement spacing. Based on these experimental results, the authors intend to use them as basic data for shear design of reinforced concrete beams by comparing and analyzing theoretical values by standard equations such as KBC 2016 and ACI 318-19 as well as proposed equations. As a result, each series of No.2 specimens (SH1-2, SH2-2 and SH3-2) with ? max = 0.67d (d/s = 1.5) similar to ? max= 0.7d by the CSA standard is 1.00 to 1.41. It was found that the current standard for shear bars = d/2 may be somewhat relaxed, but additional studies are needed to reflect this in the Korean Building Code. |