花岗岩残积土的崩解性及软化损伤参数研究 |
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引用本文: | 吴能森.花岗岩残积土的崩解性及软化损伤参数研究[J].河北工程大学学报,2006,23(3):58-62. |
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作者姓名: | 吴能森 |
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作者单位: | 福建农林大学,交通学院,福建,福州,350002 |
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摘 要: | 针对花岗岩残积土的崩解与软化特性,从结构性与损伤角度研究,为今后的定量分析研究奠定基础。首先进行一系列定性崩解试验并利用已有的定量试验结果,引入崩解速率指标,结合花岗岩残积土的微结构特征,对崩解的结构性机制进行全面分析,提出将崩解过程分为扰动性、结构性及溶解性三个阶段,揭示花岗岩残积土崩解的根本致因是软化;然后基于复合体损伤模型,提出将损伤分为应变损伤和非应变损伤,将花岗岩残积土的浸水软化看成一种非应变损伤,利用花岗岩残积土粘聚力与结构强度的相关性,提出浸水软化损伤参数的确定方法。
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关 键 词: | 花岗岩残积土 崩解机制 结构性 软化 非应变损伤 软化损伤参数 |
文章编号: | 1007-6743(2006)03-0058-05 |
修稿时间: | 2006年6月9日 |
A study on calving property and softening damage parameter of GRS |
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Authors: | WU Neng-sen |
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Abstract: | Aim at the calving and softening properties of granite residual soils (GRS),studies were carried out from points of view with structure and damage to lay a foundation for the quantitative analysis in future.On the one hand,after a series of qualitative calving tests were conducted and a quantitative test result was utilized,and the calving rate index was recommended,the calving mechanism was studied comprehensively with the microstructure characteristics of GRS,main results as follow: the calving process can be divided into three stages of disturbance,structure and dissolution;the essential reason for calving is softening.On the other hand,based on the elastoplastic damage model,in which non-strain damage was developed,or damage includes strain and non-strain damage;then,regarding softening in water as a kind of non-strain damage and making full use of the interrelationship of cohesive force and structure strength of GRS,the determination method for softening damage parameter was put forward. |
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Keywords: | granite residual soil calving mechanism structural characteristics softening non-strain damage softening damage parameter |
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