摘要
合理的计算方法和数值模型可显著提高工作效率,减少计算工作量。文章基于Eshelby-Mori-Tanaka方法和塑性损伤模型,建立了聚乙烯醇纤维增强水泥基复合材料(PVA-ECC)宏观力学特性的细观数值计算方法,实现了PVA-ECC材料及普通混凝土材料的抗压强度模拟计算,用于预测不同配合比情况下的PVA-ECC材料宏观力学特性。通过材料抗压强度试验,获得了普通混凝土和PVA-ECC材料的立方体抗压强度和轴心抗压强度,试验结果表明,28 d龄期的PVA-ECC材料的抗压强度比相同龄期的混凝土材料抗压强度有较大幅度的提升,其立方体抗压强度比混凝土的立方体抗压强度高19.6%,轴心抗压强度比混凝土的轴心抗压强度提高76.6%。通过对PVA-ECC材料及普通混凝土材料的抗压强度模拟计算可知,数值模拟结果与试验结果具有良好的一致性,由此表明文章建立的复合材料的抗压强度数值计算方法是可行有效的。
Reasonable calculation method and numerical model can significantly improve work efficiency and reduce work load.In this paper,based on Eshelby-Mori-Tanaka method and plastic damage model,a microscopic numerical calculation method for the macroscopic mechanical properties of polyvinyl alcohol fiber reinforced cement matrix composite(PVA-ECC)was established,and the compression strength simulation of PVA-ECC and concrete materials were realized,which can be used to predict the macroscopic mechanical properties of PVA-ECC materials under different mixing ratios.The cubic compressive strength and axial compressive strength of concrete and PVA-ECC materials were obtained through the material compressive strength test.According to the test results,the compressive strength of PVA-ECC materials at the age of 28 days is significantly higher than that of concrete materials at the same age.The cubic compressive strength of PVA-ECC material is 19.6%higher than that of concrete,and the axial compressive strength of PVA-ECC is 76.6%higher than that of concrete.Through the simulation calculation of the compressive strength of PVA-ECC material and concrete material,it can be seen that the numerical simulation results are in good agreement with the test results,which indicates that the numerical calculation method of the compressive strength of composite materials established in this paper is feasible and effective.
作者
刘红彪
李鹏展
张路刚
齐方利
谭林怀
卫宪
刘畅
LIU Hong-biao;LI Peng-zhan;ZHANG Lu-gang;QI Fang-li;TAN Lin-huai;WEI Xian;LIU Chang(Tianjin Research Institute for Water Transport Engineering, Tianjin 300456, China;Shengli Oilfield Offshore Oil Ship Center, SINOPEC, Longkou 265700, China;Dagang Zhaodong Oil Company of PertroChina, Tianjin 300384,China;Tianjin Chengjian University, Tianjin 300384, China)
出处
《水道港口》
2021年第4期538-544,共7页
Journal of Waterway and Harbor
基金
天津市交通运输科技发展计划项目(2020-09)
中央级科研院所基本科研业务费项目(TKS190407)。
