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Çѱ¹Áö¹Ý°øÇÐȸ / v.6, no.1, 1990³â, pp.7-14
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ÁÖµ¿´Ü¿¡ ¹Ý·ÂÀ¸ÇÁ¸µÀÌ ºÎÂøµÈ °øÁø¿ì ½ÃÇè±â¿¡¼ ¿ìµ¿´Ü ºÒ¿ÏÀü °íÁ¤ÀÇ ¿µÇâ
( Effects of Imperfect Fixing at the Active End of Spring-top Resonant Column Apparatus ) |
| ¹Î´ö±â; Á¤È¸¿ø, ¿ï»ê´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
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| ÁÖµ¿´Ü¿¡ ¹Ý·Â½ºÇÁ¸µÀÌ ºÎÂøµÈ °øÁøÁÖ(spring-top resonant column) ½ÃÇè±â ÁÖµ¿´Ü ºÒ¿ÏÀü °íÁ¤ÀÇ ¿µÇâÀ» ¿¬±¸Çϱâ À§ÇØ 2ÀÚÀ¯µµ ¸ðµ¨À» Á¦¾ÈÇÏ¿´´Ù. SYMPHONY½ºÇÁ·¹µå½²Æ®¸¦ ÀÌ¿ëÇÏ¿© ¹«Â÷¿øÁ֯ļö, F¸¦ ±¸ÇÒ ¼ö ÀÖµµ·Ï Àü»êÈÇÏ¿´À¸¸ç À̷κÎÅÍ Åº¼º°è¼ö¸¦ ±¸ÇÒ ¼ö ÀÖ´Ù. F¿¡ ´ëÇÑ ¹Ý·Â Áú·®ÀÇ ¿µÇâÀº ¹Ý·ÂÁú·® ¹× ½Ã·áÀÇ Áú·® ¹× Á֯ļö¿¡ °ü°èµÇ´Â °è¼ö, T<20ÀÎ °æ¿ì¿¡ ´Â ¹«½ÃÇÒ ¼ö ¾øÀ½À» ¹àÇû´Ù. ½ÃÇè±â ¹× ½Ã·áÀÇ Áú·®°ú Á֯ļö¿¡ °ü°èµÇ´Â °è¼ö, Tci°¡ Áõ°¡ÇÔ¿¡ µû¶ó FÀÇ ¿µÇâ ¿ª½Ã Áõ°¡ÇÏ¿´À¸³ª Tµµ 20ÀÎ °æ¿ì ±× ¿µÇâÀº Àû¾ú´Ù. ÁÖµ¿´Ü °íÁ¤À» À§Çؼ´Â T, ÀÌ 20ÀÌ»ó µÇ¾î¾ß ÇÔÀ» Á¦¾ÈÇÏ¿´À¸¸ç ÀÌ °æ¿ì SDOFÀ¸·Î Ãë±ÞÇÒ ¼ö ÀÖ´Ù. ½Ã·á¿Í ½ÃÇè±âÀÇ °¨¼èºñ´Â F¿¡ Å©°Ô ¿µÇâÀ» ¹ÌÄ¡Áö ¾ÊÀ½µµ ¹àÇû´Ù. |
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| The two degree of freedom model is proposed to study the effects of imperfect fixing at the active end of spring-top resonant column apparatus. A computer program using the SYMPHONY spreadsheet is developed to calculate the dimensionless frequency, F, from which modulug can be determined. It is found that the effect of reaction mass through the parameter Tr on dimensionless frequency, F, can not be ignored if Tr$leq$20. As To increases, the variation of F increases. But for Tr$geq$ 20, the effect of To becomes small. It is recommended that T. be greater than 20 if single degree of freedom model is rosed to determine modulus of soil. It also is found that damping ratios of specimen and apparatus do not strongly affect the dimensionless frequency, F. |
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Çѱ¹Áö¹Ý°øÇÐȸÁö:Áö¹Ý / v.6, no.1, 1990³â, pp.7-14
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199011920443788)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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