FINITE-ELEMENT MODEL WITH STRESS-DEPENDENT SUPPORT

摘要: The finite-element model presented is a modified and expanded version of the developed in 1977 for study jointed, slab-on-grade pavements, ILLI-SLAB. A number modifications to original code are described. most important these incorporation through an iterative procedure thee deflection-dependent resilient modulus subgrade reaction (K sub R). This parameter considered more appropriate modeling nonlinear response rapidly moving loads. Other changes include generation contour plots system response, introduction lines symmetry, correction uniform stiffness matrix, specification loaded areas terms global coordinates, free-form input capability. To illustrate impact innovations, results from several demonstration runs summarized. major effect proposed due higher values K R compared with commonly used static k.