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Finite element modeling of environmental effects on rigid pavement deformation

Sunghwan KIM,Halil CEYLAN,Kasthurirangan GOPALAKRISHNAN

《结构与土木工程前沿（英文）》 2014年第8卷第2期页码 101-114 doi: 10.1007/s11709-014-0254-x

摘要： In this study, finite element (FE)-based primary pavement response models are employed for investigating the early-age deformation characteristics of jointed plain concrete pavements (JPCP) under environmental effects. The FE-based ISLAB (two-and-one-half-dimensional) and EverFE (three-dimensional) software were used to conduct the response analysis. Sensitivity analyses of input parameters used in ISLAB and EverFE were conducted based on field and laboratory test data collected from instrumented pavements on highway US-34 near Burlington, Iowa. Based on the combination of input parameters and equivalent temperatures established from preliminary studies, FE analyses were performed and compared with the field measurements. Comparisons between field measured and computed deformations showed that both FE programs could produce reasonably accurate estimates of actual slab deformations due to environmental effects using the equivalent temperature difference concept.

关键词： jointed plain concrete pavements (JPCP) curling and warping sensitivity analyses rigid pavement analysis and design finite element analysis (FEA)

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双层高通量计算——包括翘曲情况下的有效质量计算 Article

Andrew Supka, Nicholas A. Mecholsky, Marco Buongiorno Nardelli, Stefano Curtarolo, Marco Fornari

《工程（英文）》 2022年第10卷第3期页码 74-80 doi: 10.1016/j.eng.2021.03.031

摘要：

本文使用了双层高通量计算。在涉及改变晶体结构和（或）化学成分的第一层中，本文分析了选定的IIIV半导体、填充和未填充的方钴矿，以及岩盐和层状硫属化物。第二层在整个布里渊区（BZ）中搜索费米能级1.5 eV (1 eV = 1.602176×10−19 J)范围内的临界点，并通过计算有效质量来表征这些点。本文介绍了几种从第一原理计算有效质量的方法并对它们进行了比较。本文使用的方法还包括计算翘曲临界点的态密度有效质量，由于临界点存在潜在非解析性，传统方法无法给出一致的结果。本文证明了考虑能带结构的全部复杂性以及计算有效质量的互补方法价值的必要性。本文还通过计算证明翘曲仅发生在有退化性的情况下。

关键词：高通量电子结构能带翘曲有效质量