土木工程岩土外文翻译-建筑结构(编辑修改稿)

土木工程岩土外文翻译-建筑结构(编辑修改稿)内容摘要：

qual and the Mohr circle bees a point. Strength criteria A strength criterion is a formula which relates the strength of a material to some other parameters: these are material parameters and may include other stresses. 河北大学 2020 届本科生毕业论文 （设计） 6 For soils there are three important strength criteria: the correct criterion depends on the nature of the soil and on whether the loading is drained or undrained. In General, course grained soils will drain very quickly (in engineering terms) following loading. Thefore development of excess pore pressure will not occur。 volume change associated with increments of effective stress will control the behaviour and the MohrCoulomb criteria will be valid. Fine grained saturated soils will respond to loading initially by generating excess pore water pressures and remaining at constant volume. At this stage the Tresca criteria, which uses total stress to represent undrained behaviour, should be used. This is the short term or immediate loading response. Once the pore pressure has dissapated, after a certain time, the effective stresses have incresed and the MohrCoulomb criterion will describe the strength mobilised. This is the long term loading response. Tresca criterion The strength is independent of the normal stress since the response to loading simple increases the pore water pressure and not the effective stress. The shear strength is a material parameter which is known as the undrained shear strength su. f = (a r) = constant MohrCoulomb (c39。 =0) criterion The strength increases linearly with increasing normal stress and is zero when the normal stress is zero. In the MohrCoulomb criterion the material 河北大学 2020 届本科生毕业论文 （设计） 7 frictional. In soils, the MohrCoulomb criterion applies when the normal stress is an effective normal stress. MohrCoulomb (c39。 0) criterion The strength increases linearly with increasing normal stress and is positive when the normal stress is zero. c39。 is the 39。 cohesion39。 intercept In soils, the MohrCoulomb criterion applies when the normal stress is an effective normal stress. In soils, the cohesion in the e。