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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.6, 2008³â, pp.27-35
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½ÀÀ± ¸ð·¡¿¡¼ ÀÎÀå°µµÀÇ ¿¹Ãø (I) : ÀÌ·Ð
( Prediction of Tensile Strength of Wet Sand (I) : Theory ) |
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| ³·Àº ÀÀ·Â ´Ü°è¿¡¼ ¸ð·¡ÀÇ ÀÎÀå°µµ´Â Æ÷ȵµ ¶Ç´Â ÈíÀԷ¿¡ µû¶ó Áõ°¡ÇÏ´Ù. ÃÖ´ë°ª¿¡ µµ´ÞÇÑ ÈÄ °¨¼ÒÇÑ´Ù. ÃÖ´ëÀÎ Àå°µµ´Â ¾î´À Æ÷ȵµ¿¡¼µç ¹ß»ýµÉ ¼ö ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â ÀÌ·¯ÇÑ ½ÀÀ± ¸ð·¡ÀÇ ÀÎÀå°µµ¸¦ Á¤È®È÷ ¿¹ÃøÇÒ ¼ö ÀÖ´Â ÀÌ·ÐÀÌ Á¦½ÃµÇ¾ú´Ù. ÀÌ ÀÌ·ÐÀº ´ÝÈù ÇüÅÂÀÇ ½ÄÀ¸·Î pendular, funicular, capillary ¼¼ °¡Áö·Î ±¸ºÐµÇ´Â ÇÔ¼öƯ¼º°î¼± Àüü ¿µ¿ªÀ» Çϳª·Î ÅëÀÏÇÏ¿© Ç¥ÇöÇÏ¿´´Ù. ³·Àº ÀÀ·Â ´Ü°è¿¡¼ ³»ºÎ¸¶Âû°¢ ${phi}_t$, °ø±âħÅõ¾Ð(air entry pressure)ÀÇ ¿ª¼ö°ª ${alpha}$, °£±ØÅ©±â¹üÀ§º¯¼ö(pore size spectrum parameter) n µî ¼¼ °¡Áö º¯¼ö°¡ À̷п¡ »ç¿ëµÇ¾ú´Ù. °ø±âħÅõ¾Ð ¿ª¼ö°ªÀÌ ÃÖ´ëÀÎÀå°µµ¸¦ Áö¹èÇÏ´Â ÁÖ ¿äÀÎÀ¸·Î ÀÛ¿ëÇϰí, ÃÖ´ëÀÎÀå°µµ°¡ ¹ß»ýµÉ ¶§ Æ÷ȵµ´Â ¿ÀÁ÷ °£±ØÅ©±â¹üÀ§º¯¼ö¿¡¸¸ ÀÇÁ¸ÇÑ´Ù. |
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| At low normal stress levels tensile strength of sand varies with either saturation or suction of soil in an up-and-down manner with a peak tensile strength that can occur at any degree of saturation. A theory that accurately predicts tensile strength of wet sand is presented. A closed form expression for tensile strength unifies tensile strength characteristics in all three water retention regimes: pendular, funicular, and capillary. Three parameters are employed in the theory; namely, the Internal friction angle (at low normal stress) ${phi}_t$, the inverse value of the air-entry pressure ${alpha}$, and the pore size spectrum parameter n. It is shown that the magnitude of peak tensile strength is dominantly controlled by the ${alpha}$ parameter. The saturation at which peak tensile strength occurs only depends on the pore size spectrum parameter n. |
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| Ű¿öµå |
| Saturation;Suction;Tensile strength;Water retention regime;Wet sand; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.6, 2008³â, pp.27-35
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200827464608891)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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