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Çѱ¹Áö¹Ý°øÇÐȸ / v.11, no.4, 1995³â, pp.37-48
°ÇÁ¶»çÁúÅäÀÇ µ¿Àû°Åµ¿ -¼öÁ÷Áøµ¿¿¡ ÀÇÇÑ ¿¬±¸
( The Behavior of Dry Sand under Dynamic Loading -A Study on the Vertical Vibration )
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º» ¿¬±¸¿¡¼­´Â ¼öÁ÷°¡¼Óµµ¸¦ ÀÏÀ¸Å°´Â Áøµ¿½ÇÇèÀ» ÅëÇÏ¿© Á¤±ÔÁøµ¿ ¹× ¹«ÀÛÀ§ Áøµ¿½ÃÀÇ °ÇÁ¶ »çÁúÅä¿¡ ´ëÇÑ µ¿Àû°Åµ¿À» ºÐ¼®ÇÏ¿´´Ù. ½ÇÇè°á°ú·ÎºÎÅÍ Áøµ¿°¡¼Óµµ¿Í »ó´ë¹ÐµµÀÇ °ü°è°î¼±À» Á¦¾ÈÇÏ¿´À¸¸ç, ¿©·¯°¡Áö »óÀçÇÏÁßÇÏ¿¡¼­ÀÇ °Åµ¿Æ¯¼ºÀ» ±Ô¸íÇÏ¿´´Ù. ½ÇÇè¿¡´Â ¿ÏÀü°ÇÁ¶µÈ »çÁúÅ並 »ç¿ëÇÏ¿´À¸¸ç, À԰溰·Î 4°³ÀÇ ½Ã·á·Î ³ª´©°í, ÇöÀåÀÔ°æ»óŸ¦ ÀçÇöÇÑ ½Ã·á¸¦ ´õÇÏ¿© ÃÑ 5°³ÀÇ ½Ã·á¸¦ »ç¿ëÇÏ¿´´Ù. Á¤±ÔÁøµ¿½ÇÇèÀÇ °æ¿ì, Áøµ¿ÁøÆøÀº 0.4mm~0.6mm·Î À¯ÁöÇϰí Áøµ¿Á֯ļö¸¦ 3~40Hz ¹üÀ§¿¡¼­ º¯È­½ÃŰ¸é¼­ °¡¼Óµµ¿¡ µû¸¥ ½Ã·áÀÇ »ó´ë¹Ðµµ º¯È­¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¹«ÀÛÀ§Áøµ¿½ÇÇèÀÇ °æ¿ì, ¹«ÀÛÀ§ÆÄ ¹ß»ý±â¸¦ ÀÌ¿ëÇÏ¿© ¹«ÀÛÀ§Áøµ¿ÆÄ¿Í 10~50Hz ¹üÀ§ÀÇ Á¤±ÔÁøµ¿ÆÄ°¡ Á¶ÇÕµÈ ÇÕ¼ºÆÄ¸¦ ¹ß»ý½Ã۰í, °¡¼Óµµ¼¾¼­·Î °¡¼Óµµ¸¦ ÃøÁ¤Çϸ鼭 »ó´ë¹ÐµµÀÇ º¯È­¸¦ ÃøÁ¤ÇÏ¿´´Ù. º» ¿¬±¸°á°ú, ¼öÁ÷°¡¼Óµµ¸¸À¸·Î »çÁúÅ並 94%~99%ÀÇ »ó´ë¹Ðµµ±îÁö ´ÙÁú ¼ö ÀÖ¾úÀ¸¸ç, ÃÖ´ë »ó´ë ¹Ðµµ¸¦ ¹ß»ý½ÃŰ´Â ¼öÁ÷°¡¼Óµµ´Â ½Ã·á°¡ ÃÖ¼Ò °ÇÁ¶ ´ÜÀ§ Áß·®ÀÏ ¶§ÀÇ °£±Øºñ¿Í ÃÖ´ë °ÇÁ¶ ´ÜÀ§ Áß·®ÀÏ ¶§ÀÇ °£±Øºñ Â÷ÀÌ¿¡ ºñ·ÊÇÏ´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. ¶ÇÇÑ, »óÀçÇÏÁßÀ» °¡ÇÏÁö ¾ÊÀº °æ¿ì°¡ »óÀçÇÏÁßÀ» °¡ÇÑ °æ¿ìº¸´Ù ½Ã·áÀÇ »ó´ë¹Ðµµº¯È­°¡ Å©°Ô ³ªÅ¸ÅÀÀ¸¸ç, »óÀçÇÏÁßÀÌ Å¬¼ö·Ï »ó ´ë¹ÐµµÀÇ º¯È­°¡ ÀϾ´Â °¡¼Óµµ°¡ Ä¿ÁüÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
The dynamic behavior of dry sand under different vibration conditions is studied through laboratory experiments. Sinusoidal and random vibration experiments of sand are carried out in vertical direction under various surcharge loads. Five different sand samples are selected for the azperiment. They are composed of four different -size samples of particles and one sample which is simulated the field condition. In case of sinusoidal vibration, the change in relative density is measured with acceleration levels. To produce an acceleration, the vibration amplitude is maintained within the range of 0.4mm~0.6mm and the vibration frequency is changed within the range of 3Hz~40Hz. In case of random vibration, the combined sinusoidal acceleration is produced by a random vibration generator and the change in relative density is measured by an accelerometer. Based on the experimental results, it is found that the sandy soil is compacted to 94%~99% of relative density by vertical acceleration and the peak acceleration producing the maximum relative density is proportional to the difference between maximum and minimum void ratios. It is also found that the effect of surcharge loading : the greater the surcharge loading, the larger the change in relative density and the greater the acceleration required to change the relative density.
 
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Çѱ¹Áö¹Ý°øÇÐȸÁö:Áö¹Ý / v.11, no.4, 1995³â, pp.37-48
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199511920446225)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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