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³í¹®¸í õÀå ´Þ´ë±¸Á¶ÀÇ ³»ÁøÇâ»óÀ» À§ÇÑ ½ºÇÁ¸µ°ú ¹æÁø°í¹«°¡ À¶ÇÕµÈ Á¦ÁøÀåÄ¡ÀÇ Áøµ¿´ë ½ÇÇè / Shaking Table Tests on the Seismic Damping-Isolation Unit Composed of a Spring and Vibration-Proof Rubbers for Improving a Seismic Performance in Ceiling Structures
ÀúÀÚ¸í ¿øÀººñ(Won, Eun-Bee) ; ¹®ÁÖÇö(Mun, Ju-Hyun) ; ¾ç±ÙÇõ(Yang, Keun-Hyeok)
¹ßÇà»ç ´ëÇѰÇÃàÇÐȸ
¼ö·Ï»çÇ× ´ëÇѰÇÃàÇÐȸ³í¹®Áý, Vol.39 No.1 (2023-01)
ÆäÀÌÁö ½ÃÀÛÆäÀÌÁö(249) ÃÑÆäÀÌÁö(7)
ISSN 2733-6247
ÁÖÁ¦ºÐ·ù ±¸Á¶ / Àç·á
ÁÖÁ¦¾î Á¦ÁøÀåÄ¡; ½ºÇÁ¸µ; ¹æÁø°í¹«; Áøµ¿´ë; µ¿ÀûƯ¼ºÆò°¡ ; vibration-control unit; spring; vibration-proof rubber; shaking table test; dynamic property
¿ä¾à1 õÀå ´Þ´ë±¸Á¶´Â ºñ±¸Á¶ÀçÀÌÁö¸¸, ÁöÁø¿¡ ÀÇÇÑ Å»¶ô½Ã ÀθíÇÇÇØÀÇ Á÷Á¢ÀûÀÎ ¿øÀÎÀÌ µÇ¹Ç·Î ³»Áø¼³°è ¶Ç´Â º¸°­ÀÌ ÇÊ¿äÇÑ ¿ä¼ÒÀÌ´Ù. ÀÌ¿¡ µû¶ó ASCE 7(2017)°ú FEMA 356(2000) ±âÁØ¿¡¼­´Â õÀ屸Á¶ÀçÀÇ ³»Áø¼º´ÉÀ» È®º¸Çϱâ À§ÇÏ¿© °¡¼Óµµ ÁõÆø°è¼ö¸¦ Æ÷ÇÔÇÑ ¼öÆòÇÏÁßÀúÇ×·ÂÀ» Á¦½ÃÇϰí ÀÖ´Ù. °¡¼Óµµ ÁõÆø°è¼ö´Â õÀ屸Á¶°¡ ¿¬¼º¿ä¼Ò·Î °£ÁÖµÉ ¶§¿¡ 2.5·Î Á¦½ÃÇϰí Àִµ¥, À̴ õÀ屸Á¶¿¡ ÀÇÇØ Áö¹Ý°¡¼Óµµ°¡ 2.5¹è±îÁö ÁõÆøµÉ ¼ö ÀÖÀ½À» ÀǹÌÇÑ´Ù. µû¶ó¼­ õÀ屸Á¶¿¡¼­ ³»ÁøÀúÇ×¼º´ÉÀ» È®º¸Çϱâ À§Çؼ­´Â õÀ屸Á¶ÀÚüÀÇ È¾ÀúÇ×·ÂÀÇ Çâ»ó »Ó¸¸ ¾Æ´Ï¶ó Áö¹Ý¿¡¼­ Àü´ÞµÇ´Â °¡¼Óµµµµ È¿°úÀûÀ¸·Î °¨¼Ò½Ãų ¼ö ÀÖ´Â ½Ã½ºÅÛÀÌ ÇÊ¿äÇÏ´Ù. ÃÖ±Ù¿¡´Â õÀå ´Þ´ë±¸Á¶¿¡¼­ ³»Áø¼º´ÉÀ» È®º¸Çϱâ À§ÇØ ´Ù¾çÇÑ ³»Áøº¸°­¹æ¹ýÀÌ °³¹ßµÇ°í ÀÖ´Ù(Wu et al., 2020; Yamasato, Morohoshi, & Harayama, 2019). Lee et al.(2020)Àº Áøµ¿ Á¦¾î¸¦ À§ÇÑ ÁÖº¯ÁöÁö Ŭ¸³À» °³¹ßÇÏ¿´´Ù. ÁÖº¯ÁöÁö Ŭ¸³Àº õÀ屸Á¶ÀçÀÇ Ãø¸é¿¡ ¼³Ä¡µÇ¾î õⱸÁ¶ÀÇ ÅØ½º, M¹Ù ¹× ÄɸµÃ¤³ÎÀÌ º®Ã¼¿ÍÀÇ Ãæµ¹À» Á¦¾îÇϴµ¥ È¿°úÀûÀ̾ú´Ù. Yamasato et al.(2019)Àº Á¦ÁøÀåÄ¡ °³³äÀ» µµÀÔÇÑ ºê·¹ÀÌ½Ì º¸°­°ø¹ýÀ» °³¹ßÇÏ¿´´Ù. ºê·¹ÀÌ½Ì º¸°­Àº Çà¾îº¼Æ® »çÀÌ¿¡ ¼³Ä¡µÇ¾î °¢ ÁÖ¿äºÎÀçµéÀÇ ÁÖ¿ä Á¶ÀÎÆ®¿¡¼­ ¹ß»ýÇÏ´Â ½½¸³ ¹× Å»¶ôÀ» ¹æÁöÇϴµ¥ È¿°úÀûÀ̾ú´Ù. ÇÏÁö¸¸ ÀÌµé º¸°­°ø¹ýµéÀº ȾÀúÇ×·ÂÀÌ ¿ì¼öÇÏ°í º®¸é°úÀÇ Ãæµ¹À» Á¦¾îÇÒ ¼ö ÀÖÁö¸¸, Áö¹Ý¿¡¼­ Àü´ÞµÇ´Â Áö¹Ý°¡¼ÓµµÀÇ ÁõÆøÀ» °¨¼Ò½ÃŰ´Â µ¥¿¡´Â È¿°úÀûÀÌÁö ¸øÇÏ´Ù(Hidayat et al., 2020). °á°úÀûÀ¸·Î ASCE 7(2017)°ú FEMA 356(2000) ±âÁØ¿¡¼­ Á¦½ÃÇϰí ÀÖ´Â °¡¼Óµµ ÁõÆø°è¼ö°¡ Áõ°¡µÉ ¼ö ÀÖ¾î ¿ÀÈ÷·Á ¿ä±¸µÇ´Â ȾÀúÇ׷°ú »ó´ëº¯À§°¡ Áõ°¡ÇÏ´Â ¹®Á¦Á¡ÀÌ ÀÖ´Ù(Luo et al., 2021). ÀÌ ¿¬±¸ÀÇ ¸ñÀûÀº °³¹ßµÈ Á¦ÁøÀåÄ¡(seismic damping-isolation unit, ÀÌÇÏ SDI À¯´Ö)ÀÇ µ¿ÀûƯ¼ºÀ» Æò°¡Çϰí ÃÖÀû»ó¼¼¸¦ Á¦½ÃÇϴµ¥¿¡ ÀÖ´Ù. °³¹ßµÈ Á¦ÁøÀåÄ¡´Â °¨¼è´É·ÂÀÌ ¿ì¼öÇÑ ½ºÇÁ¸µ°ú ¹æÁø°í¹«°¡ À¶ÇյǾúÀ¸¸ç, ÀÌ Àç·áµéÀÇ ´É·ÂÀ» Çâ»ó½Ã۱â À§ÇØ ÇÁ¸®½ºÆ®·¹½ºÆ® °ø¹ýÀÌ µµÀԵǾú´Ù. ¹æÁø°í¹«ÀÇ ÀûÃþ¼ö ¹× º¼Æ®ÀÇ ÇÁ¸®½ºÆ®·¹½º·Â µµÀÔ À¯¹«¸¦ Áֿ亯¼ö·Î ÃÑ 3°³ÀÇ SDI ½ÇÇèü°¡ Á¦À۵Ǿú´Âµ¥, 1°³ÀÇ ÀÏ¹Ý Çà¾îº¼Æ®·Î ±¸¼ºµÈ ½ÇÇèüµµ ÁغñÇÏ¿´´Ù. ¸ðµç ½ÇÇèüµéÀº ICC-ES AC156(2010)¿¡¼­ Á¦½ÃÇÏ´Â ÀÀ´ä ½ºÆåÆ®·³(required response spectrum, RRS)À» ¸¸Á·ÇÏ´Â ÁöÁøÆÄ¸¦ ÀÌ¿ëÇÏ¿© Áøµ¿´ë ½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. Áøµ¿´ë ½ÇÇèÀ¸·ÎºÎÅÍ Æò°¡µÈ SDI À¯´ÖÀÇ µ¿ÀûƯ¼ºÀº ÀÀ´ä°¡¼Óµµ, »ó´ëº¯À§, ÁõÆø°è¼ö ¹× °¨¼èºñÀ̸ç, ÀÌµé °ªµéÀº Çà¾îº¼Æ®¿¡¼­ ¾ò¾îÁø Ư¼º°ú ºñ±³ÇÏ¿´´Ù. ½ÇÇè°á°ú¸¦ ±â¹ÝÀ¸·Î õÀå ´Þ´ë±¸Á¶ÀÇ °¨¼è´É·ÂÀ» Çâ»ó½Ãų ¼ö ÀÖ´Â SDI À¯´ÖÀÇ ÃÖÀû»ó¼¼¸¦ Á¦½ÃÇÏ¿´´Ù.
¿ä¾à2 This study examined the dynamic properties of a seismic damping-isolation SDI unit developed to enhance the seismic capacity of suspended
ceiling structures. The developed SDI unit consisted of springs, vibration-proof rubber and bolts; a prestress force was introduced to improve
the damping capacity of each material. The main variables involved whether or not the bolt introduced prestress force and included the
number of layers of vibration-proof rubber. As a result of a shaking table test, the response acceleration, relative displacement, and
amplification coefficients of SDI unit decreased 55.68%, 49.26%, and 56.89%, respectively compared to general hangar bolts, while the
damping ratio increased by about 1.47 times. Based on these experimental results, for the SDI unit, the magnitude of the prestress force of
0.1 in the bolt and the vibration-proof rubber laminated in two are recommended.
¼ÒÀåó ´ëÇѰÇÃàÇÐȸ
¾ð¾î Çѱ¹¾î
DOI https://doi.org/10.5659/JAIK.2023.39.1.243
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