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计算弹性地基梁板时,大都采用文克尔地基模型。由于该模型过于简化,不能正确反映土的工程性质,为此本文提出了一种双参数层状地基模型。该模型由一系列的弹性层组成,并对每一层中应力应变分布做了假设。通过积分变换的方法可以求出每一层表面处位移与力之间的关系,进而形成层刚度矩阵。按照有限元法的原理,可把每一层的刚度矩阵凝聚成总体刚度矩阵进行求解。本文模型是V1azov模型的延伸和发展。通过与V1azov模型计算结果的比较,证明本文方法是正确的。并且本文得到了荷载作用于层状模型内部时的解答,为将双参数地基模型用于桩基分析打下了理论基础。 相似文献
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One-dimensional consolidation of layered soils with impeded boundaries under time-dependent loadings 总被引:1,自引:0,他引:1
On the basis of Terzaghi‘s one-dimensional consolidation theory, the variation of effective stress ratio in layered saturated soils with impeded boundaries under timedependent loading was studied. By the method of Laplace transform, the solution was presented. Influences of different kinds of cyclic loadings and impeded boundaries conditions were discussed. Through numerical inversion of Laplace transform, useful illustrations were given considering several common time-dependent loadings. Pervious or impervious boundary condition is just the special case of the problem considered here. Compared with average index method, the results from the method illustrated are more accurate. 相似文献
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IntroductionInsoilmechanics,theproblemsdealingwithstressinfoundationsareusuallyreferredastheBoussinesqsolutionsandtheCerrutiones (Love[1 ] ;Lure[2 ] ) .Furtherinvestigation (Bardew[3 ] ;Gibson[4 ] )tookthefoundationasapproximationoftransverselyisotropichalf_space .M… 相似文献
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非均质流固耦合介质轴对称动力问题时域解 总被引:13,自引:0,他引:13
将地基视为流固两相介质并考虑其非均质成层特性,推导了多层地基动力问题时域解.文中首先建立了一组解耦的两相介质动力控制方程;而后利用Laplace-Hankel变换推导了单层地基象空间初参数解答;再利用初参数法及传递矩阵技术导出了任意多层地基瞬态解的一般解析算式.本文获得的解答可方便地退化为现有理想弹性介质的解答 相似文献
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Spherical wave propagation in saturated soils 总被引:4,自引:0,他引:4
I.IntroductionSaturatedsoilistheonecommonlyencounteredinengineeringandfluid-solidcoupledmedium.Forsimplicity,saturatedsoilisoftentreatedasone-phasemediumfortheanalysisofdynamicresponse.Itisreasonabletotakeintoaccounttwo-phase(solidandfluid)fordynamicresponseofsoils.SinceBolt'stheoryonwavepropagationanddynamicconsolidationofsaturatedsoilswerefounded(Bolt,1941,Bolt,1956),agreatprogresshasbeendeveloped.inthefieldofdynamicanalysisofsaturatedsoils.Halpern(1986)presentedsteady-statevibrationrespon… 相似文献
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Based on the wave equations established by the authors, the characteristics of propagation velocities of elastic waves in saturated soils are analyzed and verified by ultrasonic test in laboratory and seismic survey in the field. The results provide theoretical basis for the determination of physical and mechanical parameters of saturated soils using propagation velocities of elastic waves, especially P-wave Velocity. 相似文献
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建立了成层无限固体介质中Stoneley波的特征方程,并利用这一特征方程进一步讨论了成层无限固体介质中Stoneley波的特性. 相似文献
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饱和土中弹性波的传播速度 总被引:2,自引:0,他引:2
根据所建立的波动方程分析了饱和土中弹性波的弥散特性,并且用室内超声波和现场地震波试验结果进行验证.本文为由弹性波(尤其是P波)速度测得合理的饱和土物理力学参数提供了理论依据. 相似文献