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基于有限元弹塑性模型预测乙烯基酯聚合物混凝土的结构性能

Prediction of Structural Performance of Vinyl Ester Polymer Concrete Using FEM Elasto-Plastic Model.

作者信息

Józefiak Kazimierz, Michalczyk Rafał

机构信息

Department of Theoretical Mechanics, Pavement Mechanics and Railroad Engineering, Faculty of Civil Engineering, Warsaw University of Technology, Al. Armii Ludowej 16, PL 00-637 Warsaw, Poland.

出版信息

Materials (Basel). 2020 Sep 11;13(18):4034. doi: 10.3390/ma13184034.

DOI:10.3390/ma13184034
PMID:32932907
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7560351/
Abstract

This paper presents the methodology for predicting the mechanical performance of structural elements made of polymer concrete (PC). A vinyl ester polymer concrete composition and the results of experimental studies to determine the basic mechanical properties of the material are presented. Following the strategy for sustainable development in the building industry, the material cost of polymer concrete was lowered by reducing the consumption of raw materials and the partial replacing of the microfiller fraction with recycled waste products-calcium fly ash. An accurate computational model enabling stress analysis is a convenient way to verify the suitability of PC as a construction material in structural applications. Due to difficulty in deriving an accurate analytical formula, numerical approximation (finite element method) was used as a method for solving the problem. Constitutive modeling of PC is a very important aspect of the strength calculations and here it was done within the framework of elasto-plasticity. Numerical evaluation of the static bearing capacity of PC manhole covers is shown as an example of the proposed FEM methodology. The results of computer simulations were compared with laboratory tests. Finally, the adequacy of the numerical modeling for testing new construction and material improvements is discussed. The study showed that the concrete damaged plasticity material model can be effectively used for the description of PC mechanical behavior.

摘要

本文介绍了预测聚合物混凝土（PC）制成的结构构件力学性能的方法。给出了一种乙烯基酯聚合物混凝土组合物以及确定该材料基本力学性能的实验研究结果。遵循建筑行业可持续发展战略，通过减少原材料消耗以及用再生废料——钙粉煤灰部分替代微填料部分，降低了聚合物混凝土的材料成本。一个能够进行应力分析的精确计算模型是验证PC作为结构应用中建筑材料适用性的便捷方法。由于难以推导精确的解析公式，采用数值近似（有限元法）作为解决该问题的方法。PC的本构建模是强度计算的一个非常重要的方面，在此是在弹塑性框架内完成的。以PC人孔盖静承载能力的数值评估为例展示了所提出的有限元法。将计算机模拟结果与实验室测试结果进行了比较。最后，讨论了数值建模对于测试新结构和材料改进的适用性。研究表明，混凝土损伤塑性材料模型可有效用于描述PC的力学行为。

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