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Çѱ¹Áö¹Ý°øÇÐȸ / v.27, no.3, 2011³â, pp.75-83
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ºÒÆ÷ÈÁö¹Ý¿¡ ´ëÇÑ ¿-¼ö¸®-¿ªÇÐ °Åµ¿ÀÇ ¼ö½ÄÈ
( Formulation of Fully Coupled THM Behavior in Unsaturated Soil ) |
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| ÀϹÝÀûÀÎ ºÒÆ÷ÈÁö¹ÝÀÇ °Åµ¿»Ó¸¸ ¾Æ´Ï¶ó, ¿°ú °ü·ÃµÈ ºÐ¾ß, Áö¹Ýȯ°æ ºÐ¾ß µî ´Ù¾çÇÑ ºÐ¾ß¿¡¼ ºÒÆ÷È ´Ù°øÁú Àç·áÀÇ ¿Àû-¼ö¸®Àû-¿ªÇÐÀûÀ¸·Î °áÇÕµÈ ¹®Á¦µéÀÌ ´ëµÎµÇ¸é¼ ÀÌ·¯ÇÑ ¹®Á¦µéÀ» ÇØ¼®Çϱâ À§ÇÑ ¼öÄ¡µµ±¸ °³¹ßÀÇ Çʿ伺ÀÌ ´ëµÎµÇ°í ÀÖ´Ù. º» ³í¹®¿¡¼´Â °Å½ÃÀû Á¢±Ù¹ý(macroscopic approach)¿¡ ±Ù°ÅÇÏ¿© ºÒÆ÷ÈÁö¹Ý¿¡ ´ëÇÑ ¿-¼ö¸®-¿ªÇаŵ¿ÀÇ ¼ö½Äȸ¦ ÇÏ¿´´Ù. Èë, ¹°, °ø±â¿¡ ´ëÇÑ Áú·®º¸Á¸ÀÇ ¹ýÄ¢, ¿¡³ÊÁö º¸Á¸¹ýÄ¢, ±×¸®°í ÇÏÁ߯òÇü Á¶°Ç½ÄÀ¸·ÎºÎÅÍ °áÇÕµÈ(coupled) 4°³ÀÇ Áö¹è¹æÁ¤½ÄÀ» À¯µµÇÏ¿´´Ù. Galerkin °£·«È¿Í ½Ã°£ÀûºÐÀ¸·ÎºÎÅÍ ÁÖ º¯¼öÀÎ º¯À§(u), °¡½º¾Ð($P_g$), À¯Ã¼¾Ð($P_1$), ¿Âµµ(T)¸¦ NewtonÀÇ ¹Ýº¹°úÁ¤À» ÀÌ¿ëÇÏ¿© ±¸ÇÏ´Â À¯ÇÑ¿ä¼Ò ÇÁ·Î±×·¥(FEM)À» ÀÛ¼ºÇÏ¿´´Ù. °³¹ßµÈ ÇÁ·Î±×·¥À» ÀÌ¿ëÇÏ¿© ´Ù°øÁúÀç·á¿¡¼ 2»ó È帧 ¹®Á¦ Áß ÀÏÂ÷¿ø ¹è¼ö½ÇÇè(u-$P_g-P_1$), ¿Âµµ ¾Ð¹Ð(u-$P_1$-T), ±×¸®°í ÁöÇ¥¸é ¿Âµµº¯È¿¡ ÀÇÇÑ ¸»¶ÒÀÇ ÁÖº¯Áö¹Ý¿¡ ´ëÇÑ ¿µÇâ(u-$P_1$-T)¿¡ ´ëÇÏ¿© ¼öÄ¡ÇØ¼®À» ¼öÇàÇÏ°í ³íÀÇÇÏ¿´´Ù. |
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| Emerging issues related with fully coupled Thermo-Hydro-Mechanical (THM) behavior of unsaturated soil demand the development of a numerical tool in diverse geo-mechanical and geo-environmental areas. This paper presents general governing equations for coupled THM processes in unsaturated porous media. Coupled partial differential equations are derived from three mass balances equations (solid, water, and air), energy balance equation, and force equilibrium equation. With Galerkin formulation and time integration of these governing equations, finite element code is developed to find nonlinear solution of four main variables (displacement-u, gas pressure-$P_g$), liquid pressure-$P_1$), and temperature-T) using Newton's iterative scheme. Three cases of numerical simulations are conducted and discussed: one-dimensional drainage experiments (u-$P_g-P_1$), thermal consolidation (u-$P_1$-T), and effect of pile on surrounding soil due to surface temperature variation (u-$P_1$-T). |
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| Ű¿öµå |
| THM coupling;Multiphase flow;FEM;Unsaturated soils; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.27, no.3, 2011³â, pp.75-83
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201117148819499)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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