分析中的應(yīng)用
(1. 西安交通大學(xué) 土木系， 西安 710049)
摘 要: 應(yīng)用統(tǒng)一強度理論對巖石在三軸壓縮載荷下的強度特性進行了理論分析，并將分析結(jié)果與已有實驗結(jié)果作了對比。研究表明，統(tǒng)一強度理論能較全面地反映巖石的各種強度特征。另外，還應(yīng)用統(tǒng)一強度理論對靜水壓力條件下的圓形巷道圍巖進行了彈塑性分析，分析表明，與Mohr-Coulomb強度理論結(jié)果相比，巷道軸向應(yīng)力和強度理論中的參數(shù)b對巷道圍巖塑性區(qū)半徑、應(yīng)力分布及徑向位移等均有影響。
關(guān)鍵字: 統(tǒng)一強度理論；巖石強度；巷道圍巖；彈塑性分析
its application in
elasto-plastic analysis to tunnel
（1. Department of Civil Engineering,
Xi′an Jiaotong University,Xi′an 710049, China）
Abstract:The characteristics of rock strength under triaxial compressive stress is analyzed by the unified strength theory. The results show that the unified strength theory can deliberate many aspects of the rock strength. In addition, the elasto-plastic analysis using the unified strength theory is also devoted to the wall rock of tunnel with circular cross-section under static hydraulic pressure . The results show that the axial stress parallel to the tunnel and the parameter b in unified strength theory have significant effects on the radius of plastic zone, the magnitude of stresses and the displacement of the wall rock of tunnel, comparing with theory of Mohr-Coulomb .
Key words: unified strength theory; strength of the rock; wall rock of the tunnel; elasto-plastic analysis
