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 摘要針對地下工程穩(wěn)定性分析與優(yōu)化的常規(guī)指標在高地應力條件下的局限性及傳統的能量釋放率巖爆指標把巖體看成不發(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。
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從薄板彎曲理論出發(fā),討論了薄壁桿件理論與實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件理論的局限性,對考慮截面畸變的梁理論? ?廣義梁理論( gbt )的基本假定進行了探討。
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有限元程序對脹栓拔出法試驗過程進行彈性理論分析;以修正的摩爾-庫侖破壞準則,在擬合實際破壞面的基礎上推導出極限狀態(tài)下脹栓拔出法的混凝土拔出力與混凝土抗壓強度的理論公式,并把該公式與脹栓拔出法測強公式進行了比較。