本文關(guān)鍵詞： 單組非貫通節(jié)理巖體 損傷變量 應(yīng)力強(qiáng)度因子 單軸壓縮 彈性余能等效假設(shè)　出處：《巖土力學(xué)》2016年S1期 　論文類(lèi)型：期刊論文

【摘要】：作為巖體組成部分的非貫通節(jié)理對(duì)巖體力學(xué)特性有著重要影響,然而幾乎目前所有的巖體損傷變量計(jì)算方法都僅考慮節(jié)理幾何參數(shù)對(duì)巖體力學(xué)特性的影響。對(duì)含單組非貫通節(jié)理的巖體力學(xué)特性進(jìn)行研究,提出一個(gè)能夠同時(shí)考慮節(jié)理幾何及強(qiáng)度參數(shù)對(duì)巖體力學(xué)特性影響的新的巖體損傷變量計(jì)算方法。首先,采用彈性余能等效假設(shè)代替Lemaitre應(yīng)變等效假設(shè)研究由節(jié)理引起的巖體各向異性損傷,并基于斷裂力學(xué)中單個(gè)節(jié)理引起的附加應(yīng)變能增量與損傷力學(xué)應(yīng)變能釋放量相關(guān)聯(lián)的觀點(diǎn),推導(dǎo)出由單條節(jié)理引起的損傷變量計(jì)算公式。其次,根據(jù)斷裂力學(xué)理論獲得了單軸壓縮下單條節(jié)理尖端應(yīng)力強(qiáng)度因子(SIF)K_Ⅰ、K_Ⅱ的計(jì)算公式。最后,通過(guò)考慮節(jié)理間的相互作用給出了單組單排或多排節(jié)理尖端應(yīng)力強(qiáng)度因子K_Ⅰ、K_Ⅱ的計(jì)算公式,得到了單組節(jié)理引起的巖體損傷變量計(jì)算公式,并與已有試驗(yàn)結(jié)果的對(duì)比分析證明了該公式的合理性。
[Abstract]:As a part of rock mass, non-through joints have an important influence on the mechanical properties of rock mass. However, almost all the methods for calculating damage variables of rock mass only consider the effect of geometric parameters of joints on the mechanical properties of rock mass. A new method for calculating damage variables of rock mass considering the effects of joint geometry and strength parameters on the mechanical properties of rock mass is proposed. The anisotropic damage of rock mass caused by joints is studied by using elastic complementary energy equivalent hypothesis instead of Lemaitre strain equivalent hypothesis, and based on the viewpoint that the increment of additional strain energy caused by a single joint in fracture mechanics is related to the release of strain energy of damage mechanics. The formula for calculating damage variables caused by single joint is derived. Secondly, according to the theory of fracture mechanics, the formula for calculating the stress intensity factor (SIFK _ I / K _ 鈪，

本文編號(hào)：1534733