a 3d analytical model including geometric stiffness of the arch and the secant modulus of the hangers is established.
计算了拱圈的几何刚度和斜吊桿的割线刚度对地震反应的影响;
the results also show that the axial pressure will induce the internal cracks in rock, weaken the carrying capacity of microelement and reduce the secant modulus of rock;
本文的研究结果也证明了沖击过程中轴压对砂巖内部的裂纹起催生作用,弱化微元体的承载能力,导致割线模量降低;
while the confining pressure will inhibit the initiation and propagation of cracks, consolidate the carrying capacity of microelement and enhance the secant modulus of rock.
围压则可以抑制裂纹的萌生和扩展,强化了微元体的承载能力,使得割线模量会增加。
the secant modulus of soil is usually larger than the tangent one, but the value of differences decreases with the increasing strain.
土体割线模量值大于切线模量值,其差值随应变的增加逐渐减小;