Abstract : the reliability of pressure vessels is studied with different strength theories in this paper . some useful conclusions are obtained 文摘:在不同强度理论条件下，对压力容器的可靠度进行了研究，得出了一些有益的结论
Various strength theories of cement - soil including traditional strength theory and uniform strength theory of double shear were discussed in this paper 详细讨论了水泥土的各种强度理论，包括传统的强度理论和双剪统一强度理论。
In this paper , a stress criterion for material mini failure is suggested . given a proper parameter , fourth criterions among the five classical strength theories could be described by the formula 摘要本文提出细观应力破坏准则。适当地选取该准则中的参数，该准则可以包含五大强度理论中的四个。
( 5 ) introduced the shear strength theory of unsaturated ~ oil , program for checking the stability of rock slope under the influence of surface infiltration is worked out by using the limit equilibrium method 引入非饱和土的抗剪强度理论，运用刚体极限平衡法，研制出了地表入渗影响下的岩坡稳定性验算程序。
Through establishing a new stress to gain another stress in structure strength test and making a judgment to apply the twin shear stress , the thesis offers a total theory and gets a mechanical premise 应用该函数对复杂结构强度试验中弹塑性范围内直接检测到的应变数据进行应力转换，并结合双剪应力强度理论对结构强度进行判定。
For deriving the formula of the concrete filled steel tube short column subjected to axial compress we use the forth strength principle that is the shape energy ratio principle and get the formula when the steel gets into plastic stage 在推导钢管混凝土轴心受压短柱承载力公式时，论文利用第四强度理论(即形状比能理论)推导出钢管进入塑性状态时的应力公式和三向应力状态下混凝土的破坏准则公式。
Based on the mechanism of water inrust at karst collapse column , the factors which affect the rational size calculation of the coal column applied to prevent water inrush are analysed , and the formulas to determine the minimum size of the coal column are obtained 根据岩溶陷落柱突水的力学机理，分析了防突煤柱合理尺寸计算的影响因素；利用岩石强度理论得到了防突煤柱保持稳定所要求的最小尺寸计算公式。
The authors apply the strength theories to the pressure vessels to study and compare the results based on the four classical strength theories and the mean radius formula and the asme formula , so that the research fruits are helpful to pressure vessel engineering design 将强度理论应用于压力容器，分析、研究了四个强度理论以及中径公式和修正的中径公式所产生的结果，期望这些研究结果有益于压力容器的设计。
Based on unified strength theory , the boundary line equation of surrounding rock mass plastic zone under non - uniform stress field was deduced , and it can be used to pre - estimate the dimensions and shapes of underground tunnel ' s plastic zone with different coefficients of horizontal pressure 摘要基于统一强度理论，推导出非均匀应力场的巷道围岩塑性区边界线方程式，可用于预测不同侧压系数时地下深埋隧洞的塑性区大小及形状。
At first the application and theory of steel fiber reinforced concrete at home and abroad are analyzed in this paper . then , based on the basic theories of fiber reinforced concrete , mechanical properties and strength theories of steel fiber reinforced concrete are studied systematically 本文通过对国内外当前关于钢纤维混凝土的应用及理论分析,基于钢纤维混凝土基本理论,对钢纤维混凝土力学性能及强度理论进行了较为系统的研究。
