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[探讨]请教湿化变形如何分析 [复制链接]

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离线basara_he
 

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只看楼主 倒序阅读 使用道具 楼主  发表于: 2010-10-09
跟某人讨论湿化变形的模拟时回复, |I+E`,n"b  
The slaking mechanism is closely related to the collapse mechanism that occurs in loose soils during static or dynamic loading.  There are a number of important case histories on the subject matter.  The flooding causes the pore-water pressures to increase, which leads to a decrease in effective stress.  The decrease in effective stress causes the stress paths to track onto the collapse surface; consequently, the soils have the tendency to undergo large and rapid plastic deformations, specifically volumetric compression.  The collapse surface is in many ways analogous to a yield locus in classical elastic-plastic soil mechanics.    3]Lk}0atpL  
As you know, almost all constitutive models for soils are formulated on the assumption that a decrease in effective stress is associate with volumetric expansion (i.e. heave).  There are some constitutive models that capture the collapse mechanism.  Incidentally, a former student of Morgenstern (graduate of University of Alberta) and employee of GEO-SLOPE formulated such a model (referenced in QUAKE book: Gu).  Unfortunately the constitutive model does not lend itself well to implementation in a commercial software package.  In fact, I'm not sure that there is a commercial package on the market that captures the collapse mechanism adequately. |H_)u  
大家有没有做过湿化变形模拟的,如何处理呢?确实没有成熟的湿化本构模型吗? :g9z^ $g  
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只看该作者 1楼 发表于: 2011-12-11
                  
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