硫酸盐侵蚀下混凝土的非经典非线性效应变化*

南京大学学报(自然科学版) ›› 2011, Vol. 47 ›› Issue (2): 126–133.

硫酸盐侵蚀下混凝土的非经典非线性效应变化*

王晓惠 1 , 刘晓宙 1 ** , 龚秀芬 1 , V. E. Nazarov 2

出版日期:2015-04-09 发布日期:2015-04-09
作者简介: (1. 近代声学教育部重点实验室, 南京大学声学研究所, 南京, 210093;
2. Institute of Applied Physics, Russian Academy of Science, Nizhny Novgorod, 603950, Russia)
基金资助:
国家自然科学基金( 11074122) , 中国科学院声场声信息国家重点实验室资助项目( SKLOA201005)

The changes of the nonclassical nonlinear effect under erosion of sulfate

Wang Xiao H ui 1 , Liu Xiao Zhou1 , Gong Xiu Fen 1 , V. E. Nazarov 2

Online:2015-04-09 Published:2015-04-09
About author: ( 1. Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics,
Nanjing University, Nanjing, 210093, China;
2. Institute of Applied Physics, Russian Academy of Science, Nizhny Novgorod, 603950, Russia)

摘要/Abstract

摘要： 混凝土由于受硫酸盐侵蚀和干湿循环作用, 内部出现微损伤, 性能发生劣化. 目前国内外针对结构混凝土硫酸盐侵蚀和干湿循环作用对结构混凝土的损伤失效的研究都集中在力学性能方面, 关于
损伤和劣化规律特别是无损检测的实验研究较少. 混凝土无损检测技术一般采用线性超声方法, 用非线性声学方法检测混凝土损伤和劣化规律的研究才刚刚起步. 岩石、混凝土等非线性介观弹性固体材料显
示出与经典非线性声学不同的非经典非线性现象, 包括谐波的滋生、非线性频率偏移、非线性参量的变化等. 本文实验研究了受硫酸盐侵蚀和干湿循环作用不同程度的六个水泥砂浆棱柱样品的线性与非线
性声学特性, 分析了混凝土受硫酸盐侵蚀和干湿循环作用后的损伤程度和劣化规律, 探讨了使用非经典非线性相关参数来表征混凝土早期微损伤程度的可能性.

Abstract: When concrete is under sulfate erosion and the wet and dry cycles, the internal micro-damage and performance degradation occur. Studies on structure concrete that is under sulfate erosion and the wet and dry cycles
is not enough, the research at present is focused mainly on the mechanical properties of structure concrete. T here are few works on the internal micro ?damage and the performance degradation of structural concrete. Concrete
nondestructive testing techniques are generally using linear ultrasonic method. T he nonlinear acoustic method used to obtain the concrete damaging and deteriorating law has just started. Rock, concrete and other nonlinear
mesoscopic elastic solids show the nonclassical nonlinear phenomena, including the amplitude of the odd harmonicshigher than that of the even harmonics, nonlinear resonance frequency shift and the change of the nonlinear
parameters, which are different from those in classical nonlinear. In this paper, the linear and nonlinear acoustic properties of the six samples of cement mortar prism concrete subjected to sulfate erosion and different extent of wet
and dry cycles are experimental studied. Internal micro-damage and the performance degradation of structure concrete that is under sulfate erosion and the wet and dry cycles are analyzed in this paper. And we explore the
possibility of using the nonclassical nonlinear parameters to characterize micro damage of concrete at early age.

王晓惠 1 , 刘晓宙 1 ** , 龚秀芬 1 , V. E. Nazarov 2 . 硫酸盐侵蚀下混凝土的非经典非线性效应变化*

[J]. 南京大学学报(自然科学版), 2011, 47(2): 126–133.

Wang Xiao H ui 1 , Liu Xiao Zhou1 , Gong Xiu Fen 1 , V. E. Nazarov 2
. The changes of the nonclassical nonlinear effect under erosion of sulfate
[J]. Journal of Nanjing University(Natural Sciences), 2011, 47(2): 126–133.

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