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¾Þ±Û°ú ö±ÙÀ» Á¶¸³ÇÑ PSRC ÇÕ¼º±âµÕÀÇ ÈÚ ½ÇÇè / Flexural Test for Prefabricated Composite Columns Using Steel Angle and Reinforcing Bar |
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¾öżº ; ȲÇöÁ¾ ; ¹ÚÈ«±Ù ; ÀÌâ³² ; ±èÇü¼· |
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Çѱ¹°±¸Á¶ÇÐȸ ³í¹®Áý, v.24 n.5 (2012-10) |
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½ÃÀÛÆäÀÌÁö(535) ÃÑÆäÀÌÁö(13) |
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ÇÕ¼º±âµÕ ; SRC ; ¾Þ±Û ; ¼±Á¶¸³ ; ºÎÂø °µµ ; composite column ; SRC ; angle ; prefabrication ; bond strength |
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PSRC ±âµÕÀº ¾Þ±ÛÀ» ÄÜÅ©¸®Æ®¿¡ ¸ÅÀÔ½ÃŲ ±âµÕÀ¸·Î, ´Ü¸éÀÇ ¿Ü°û Äڳʿ¡ ¹èÄ¡µÇ´Â ¾Þ±ÛÀÌ ±âµÕÀÇ ÈÚ-¾ÐÃà¿¡ ÀúÇ×Çϰí, Ⱦö±ÙÀº ±âµÕÀÇ Àü´Ü°ú ¾Þ±Û-ÄÜÅ©¸®Æ® »çÀÌÀÇ ºÎÂø¿¡ ÀúÇ×ÇÑ´Ù. º» ¿¬±¸¿¡¼´Â KBC 2009¿¡ µû¶ó PSRC ÇÕ¼º±âµÕÀÇ ÈÚ, Àü´Ü, ºÎÂø ¼³°è¹æ¹ýÀ» Á¤¸³Çϰí, ´Ü¼øÁöÁöµÈ 2/3 ½ºÄÉÀÏÀÇ PSRC º¸¿Í SRC º¸ÀÇ 2Á¡ °¡·Â ÈÚ½ÇÇèÀ» ÅëÇÏ¿© Á¦¾ÈµÈ ¼³°è¹ýÀ» °ËÁõÇϰí PSRC ÇÕ¼º±âµÕÀÇ ÆÄ±« Ư¼ºÀ» ºÐ¼®ÇÏ¿´´Ù. ´Ü¸éÀÇ °Àçºñ¿Í Ⱦö±Ù °£°ÝÀ» ½ÇÇè º¯¼ö·Î °í·ÁÇÏ¿´´Ù. ½ÇÇè°á°ú, KBC 2009À¸·Î ¿¹ÃøÇÑ PSRC ÇÕ¼º±âµÕÀÇ ÈÚ, Àü´Ü, ºÎÂø °µµ´Â ½ÇÇè°á°ú¿Í Àß ÀÏÄ¡ÇÏ¿´´Ù. °í°µµ ¾Þ±ÛÀÌ ±âµÕ ´Ü¸éÀÇ ¿Ü°û¿¡ ¹èÄ¡µÇ¹Ç·Î PSRC ÇÕ¼º±âµÕÀº µ¿ÀÏÇÑ °Àçºñ¸¦ °®´Â ÀÏ¹Ý SRC ÇÕ¼º±âµÕ ´Ü¸é¿¡ ºñÇÏ¿© ¸Å¿ì ¿ì¼öÇÑ ÈÚÀúÇ× ¼º´ÉÀ» ³ªÅ¸³Â´Ù. ±×·¯³ª ¾Þ±Û°ú ÄÜÅ©¸®Æ® »çÀÌÀÇ ºÎÂø°µµ°¡ ÃæºÐÈ÷ Çк¸µÇÁö ¸øÇÑ °æ¿ì ÇÕ¼º±âµÕ ´Ü¸éÀÇ ÈÚÇ׺¹°µµ¸¦ ¹ßÈÖÇϱâ ÀÌÀü¿¡ ¾Þ±ÛÀÇ ºÎÂøÆÄ±«, ÇǺ¹ÄÜÅ©¸®Æ® ÆÄ±«, Ⱦö±ÙÀÇ ÆÄ´Ü µîÀÌ ¹ß»ýÇÏ¿´´Ù. ¶ÇÇÑ ¾Þ±Û ¿ëÁ¢¼º ¹× ÀμºÀÌ ºÎÁ·ÇÒ °æ¿ì ¾Þ±Û-Ⱦö±Ù ¿ëÁ¢ºÎ¿¡¼ ¾Þ±ÛÀÇ ÆÄ´Ü¿¡ ÀÇÇØ ½ÇÇèü°¡ ÆÄ±«µÇ¾ú´Ù. |
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PSRC column is a concrete encased steel angle column. In the PSRC column, the steel angles placed at the corner of the cross-section resists bending moment and compression load. The lateral re-bars welded to steel angles resist the column shear and the bond between the steel angle and concrete. In the present study, current design procedures in KBC 2009 were applied to the flexure-compression, shear, and bond design of the PSRC composite column. To verify the validity of the design method and failure mode, simply supported 2/3 scaled PSRC and correlated SRC beams were tested under two point loading. The test parameters were the steel angle ratio and lateral bar spacing. The test results showed that the bending, shear, and bond strengths predicted by KBC 2009 correlated well with the test results. The flexural strength of the PSRC specimens was much greater than that of the SRC specimen with the same steel ratio because the steel angles were placed at the corner of the column section. However, when the bond resistance between the steel angle and concrete was not sufficient, brittle failures such as bond failure of the angle, spalling of cover concrete, and the tensile fracture of lateral re-bar occurred before the development of the yield strength of PSRC composite section. Further, if the weldability and toughness of the steel angle were insufficient, the specimen was failed by the fracture of the steel angle at the weld joint between the angle and lateral bars. |