In response to the limitation of conventional index for stability and optimal design of underground rockmass engineering with high geostress and the drawbacks of conventional energy release rate ( err ) rockburst index based on linear elastic theory without brittle failure phenomenon , local energy release rate ( lerr ) , a new rockburst index is proposed 摘要針對(duì)地下工程穩(wěn)定性分析與優(yōu)化的常規(guī)指標(biāo)在高地應(yīng)力條件下的局限性及傳統(tǒng)的能量釋放率巖爆指標(biāo)把巖體看成不發(fā)生脆性破壞線彈性體的不足,提出局部能量釋放率新指標(biāo)。
In the scope of linear elastic theory , the consistent of the fundamental assumption between the theory of thin - walled beams and solid beams is analyzed and defined from the viewpoint of the thin plate theory . the drawback of volassov thin - walled beams theory is studied on the ground of the traverse distribution of loads on the thin plate . and , the fundamental assumption of generalized beam theory ( gbt ) is surveyed 本文在線彈性的范圍內(nèi)從薄板彎曲理論出發(fā),討論了薄壁桿件理論與實(shí)體梁理論在基本假定上的一致性,并從薄板荷載橫向分布形式的角度分析了符拉索夫薄壁構(gòu)件理論的局限性,對(duì)考慮截面畸變的梁理論? ?廣義梁理論( gbt )的基本假定進(jìn)行了探討。
Thirdly writer , using linear elastic theory and finite element program ( ansys ) , analyzed expanding bolt pullout test . fifthly , writer using the modified mohr - coulomb failure theory , on the base of curving failure surface , derived a theoretical formula between pullout force and compressive strength . then the thesis compared the formula with the strength - detecting formula of expanding bolt pullout method 本文采用ansys有限元程序?qū)γ浰ò纬龇ㄔ囼?yàn)過程進(jìn)行彈性理論分析;以修正的摩爾-庫侖破壞準(zhǔn)則,在擬合實(shí)際破壞面的基礎(chǔ)上推導(dǎo)出極限狀態(tài)下脹栓拔出法的混凝土拔出力與混凝土抗壓強(qiáng)度的理論公式,并把該公式與脹栓拔出法測(cè)強(qiáng)公式進(jìn)行了比較。