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Çѱ¹Áö¹Ý°øÇÐȸ / v.26, no.2, 2010³â, pp.5-14
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ÀÌ¹æ ±¸¼Ó Á¶°Ç¿¡¼ ½ÇÁöÁø ÇÏÁßÀ» ÀÌ¿ëÇÑ Æ÷È»çÁúÅäÀÇ ¾×»óÈ ÀúÇ×°µµ Ư¼º
( A Study on the Liquefaction Resistance of Anisotropic Sample under Real Earthquake Loading ) |
| ÀÌÀçÁø;±è¼öÀÏ;Á¤»ó¼¶; ¿¬¼¼´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
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| º» ¿¬±¸¿¡¼´Â Áö¹ÝÀÇ ÀÀ·Â»óÅÂ¿Í µ¿ÇÏÁßÀ» ½ÇÁ¦ Áö¹Ý ¹× ÁöÁøÇÏÁß°ú °¡Àå °¡±õ°Ô ¸ð»çÇϱâ À§ÇÏ¿© ¿©·¯ ¾Ð¹Ð ÀÀ·Âºñ(K) Á¶°ÇÀ¸·Î ½Ã·á¸¦ ±¸¼Ó½ÃŲ ÈÄ ½ÇÁöÁø ÇÏÁßÀ» ÀÌ¿ëÇØ Áøµ¿»ïÃà½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. ½ÃÇè½Ã ½Ã·á´Â ¾×»óȰ¡ ¹ß»ý °¡´ÉÇÑ »ó´ë¹Ðµµ 50%ÀÇ ÁÖ¹®Áø Ç¥Áػ縦 »ç¿ëÇÏ¿´´Ù. ½ÃÇèÀº K¸¦ 0.5~1.0±îÁö º¯È ½ÃŰ¸ç ±¸¼ÓµÈ ½Ã·á¿¡ Ofunato ÁöÁøÆÄ¿Í Hachinohe ÁöÁøÆÄ¸¦ »ç¿ëÇÏ¿© ÃàÇÏÁßÀ» º¯È ½Ã۸ç Áøµ¿»ïÃà½ÃÇèÀ» ¼öÇàÇÏ¿© °úÀ×°£±Ø¼ö¾ÐºñÀÇ ¹ßÇö Á¤µµ¿¡ µû¶ó ¾×»óÈ ÀúÇ×°µµ¸¦ ÆÇ´ÜÇÏ¿´´Ù. ¿¬±¸ °á°ú K°ªÀÌ Å¬¼ö·Ï °úÀ×°£±Ø¼ö¾ÐºñÀÇ ¹ßÇöÀÌ Å©°Ô µÇ¾ú°í, ´Ù¸¥ Á¶°ÇÀÌ °°À» ¶§ µî¹æ±¸¼ÓµÈ ½Ã·á¿¡¼ °úÀ×°£±Ø¼ö¾ÐºñÀÇ ¹ßÇöÀÌ °¡Àå ÀߵǾú´Ù. Áï, µî¹æ ±¸¼ÓµÈ ½Ã·á°¡ ÀÌ¹æ ±¸¼ÓµÈ ½Ã·áº¸´Ù µ¿ÀÏ Á¶°Ç¿¡¼ ¾×»óÈ ÀúÇ×°µµ°¡ ´õ Å©´Ù´Â »ç½Ç¿¡ ¹ÝÇÏ´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù. ½ÃÇè °á°ú °ªÀ» ÀÌ¿ëÇÏ¿© K¿¡ µû¸¥ ÃÖ´ë°úÀ×°£±Ø¼ö¾Ðºñ¸¦ À¯µµÇÒ ¼ö ÀÖ¾ú°í, ±×°ÍÀ» À¯È¿±¸¼Ó¾Ð°ú ÃàÂ÷ ÇÏÁßÀ» ÀÌ¿ëÇÏ¿© ¼±ÇüÀ¸·Î Á¤±ÔÈ ÇÏ¿´À¸¸ç, µî¹æ ±¸¼ÓµÈ ½Ã·áÀÇ ¾×»óÈ ÀúÇ×°µµ·ÎºÎÅÍ ÀÌ¹æ ±¸¼ÓµÈ ½Ã·áÀÇ ¾×»óÈ ÀúÇ×°µµ¸¦ ±¸ÇÒ ¼ö ÀÖ´Â º¸Á¤°è¼ö¸¦ Á¦¾ÈÇÏ¿´´Ù. |
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| In this study, cyclic triaxial tests were performed under anisotropically consolidated condition by using irregular earthquake loading to consider in-situ condition and seismic wave. Jumunjin sand with a relative density 50 percent was used in the tests. The consolidation pressure ratio (K) was changed from 0.5 to 1.0. The Ofunato and Hachinohe wave were applied as irregular earthquake loadings and liquefaction resistance strengths of each specimen were estimated from the excess pore water pressure (EPWP) ratio. As a results of the cyclic triaxial tests, EPWP ratio increased with increased K value. It shows that isotropically consolidated sand is more susceptible to liquefaction than anisotropically consolidated sand under equal confining pressure and dynamic loadings. From the test results, the relationship between K and EPWP ratio normalized by effective confining pressure and deviator stress was proposed. And a new factor which corrects the liquefaction resistance strength for the in-situ stress condition is proposed. |
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| Ű¿öµå |
| Anisotropic condition;Cyclic triaxial test;Earthquake loading;Excess pore water pressure;Liquefaction resistance strength; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.26, no.2, 2010³â, pp.5-14
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201023064630779)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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