Elastic wave propagation in a segmented X-ray computed tomography model of a concrete specimen
Elastic wave propagation in a segmented X-ray computed tomography model of a concrete specimen
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DOI：
10.1016/j.conbuildmat.2010.05.013
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发表时间：
2010-12-01
影响因子：
7.4
通讯作者：
Vogel, Thomas
中科院分区：
文献类型：
--
作者：
Kocur, Georg Karl;Saenger, Erik H.;Vogel, Thomas
本文的目的是证明之间的协同作用的X射线计算机断层扫描（CT）数据的混凝土试样和数值模拟的弹性波传播在一个纯粹的数值混凝土模型（NCM）。未开裂和开裂的混凝土试样进行扫描，使用X射线断层扫描，并在随后的步骤中，进行后处理，以分析混凝土成分对波传播行为的影响。介绍了非均质随机分布介质无裂缝混凝土的数值模拟。均匀化的材料特性，即所谓的有效弹性特性，被确定用于分割的X射线CT图像和NCM。这两种方法的结果进行了比较和讨论。数值模拟波在分段X射线CT模型和数值混凝土模型中的传播，并进行比较。研究了混凝土中骨料颗粒和空隙率等组分对波传播特性的影响。(C)2010爱思唯尔有限公司保留所有权利。
The paper aims to demonstrate the synergy between X-ray computed tomography (CT) data for a concrete specimen and numerical simulations of elastic wave propagation in a purely numerical concrete model (NCM). Uncracked and cracked concrete specimens are scanned using X-ray tomography, and in a subsequent step, are post-processed to analyze the influence of concrete constituents on wave propagation behavior. Numerical modeling of uncracked concrete as a heterogeneous randomly-distributed medium is introduced. Homogenized material properties, the so-called effective elastic properties, are determined for the segmented X-ray CT images and the NCM. The results of both approaches are compared and discussed. Numerical simulations of wave propagation in the segmented X-ray CT model and the numerical concrete model are performed and compared. The influence of concrete constituents such as aggregate grains and air voids on wave propagation behavior is studied. (C) 2010 Elsevier Ltd. All rights reserved.