本文選題：單軸壓縮試驗(yàn)　切入點(diǎn)：彈性模量　出處：《長(zhǎng)江科學(xué)院院報(bào)》2014年09期 　論文類(lèi)型：期刊論文

【摘要】：利用FLAC3D建立單軸壓縮試驗(yàn)數(shù)值模型并與實(shí)際情況比較以驗(yàn)證模型可靠性�？刂破渌牧蠀�(shù),改變單元體彈性模量分析巖體抗壓強(qiáng)度的影響。巖體模型各單元體彈性模量在一定區(qū)間內(nèi)分別按均勻變化規(guī)律取值、隨機(jī)取值以及按正態(tài)分布規(guī)律取值,研究單元體彈性模量分布規(guī)律對(duì)巖石單軸抗壓強(qiáng)度的影響。結(jié)果表明:彈性模量分布的均勻性越好,巖石抗壓強(qiáng)度越大,最大值等于整個(gè)巖體模型彈性模量取相同參考值時(shí)的計(jì)算結(jié)果;單元體彈性模量在一定區(qū)間內(nèi)隨機(jī)取值時(shí),巖石抗壓強(qiáng)度將減小,且彈性模量隨機(jī)取值區(qū)間越大,巖石抗壓強(qiáng)度越小;在相同的取值區(qū)間上,彈性模量按正態(tài)分布規(guī)律取值時(shí)巖石抗壓強(qiáng)度大于彈性模量隨機(jī)取值時(shí)的抗壓強(qiáng)度。兩者都小于整個(gè)巖體模型彈性模量取相同參考值時(shí)巖石的抗壓強(qiáng)度,即σ1≥σE正態(tài)分布≥σE隨機(jī)分布。
[Abstract]:The numerical model of uniaxial compression test is established by using FLAC3D and compared with the actual situation to verify the reliability of the model, and other material parameters are controlled. Changing the elastic modulus of the unit body to analyze the influence of the rock mass compressive strength. The elastic modulus of each unit body of the rock mass model is chosen according to the uniform variation law, random value and normal distribution law in a certain range, respectively. The effect of elastic modulus distribution on uniaxial compressive strength of rock is studied. The results show that the better the uniformity of elastic modulus distribution, the greater the compressive strength of rock. When the elastic modulus of the whole rock mass model is equal to the same reference value, the compressive strength of the rock decreases when the elastic modulus of the element body is chosen randomly in a certain range, and the larger the random value interval of the elastic modulus is, The smaller the compressive strength of the rock; in the same value range, The compressive strength of rock is larger than that of random value of elastic modulus when the elastic modulus is chosen according to the normal distribution law. Both are smaller than the compressive strength of rock when the elastic modulus of the whole rock mass model takes the same reference value. That is, 蟽 1 鈮，

本文編號(hào)：1589473