Mechanical Modeling of Chemo-mechanical Coupling Behavior of Leached Concrete

来源 :The 14th International Congress on the Chemistry of Cement ( | 被引量 : 0次 | 上传用户：kkkjnc

【摘要】

：

Based on the analysis and experimental results obtained from uniaxial and triaxial strain and stress relationship of leached concrete, an elastoplastic constitutive model coupled with leaching damage

【作者】

：

Chunxiang Qian Bei Huang Zhihai He Haihe Yi Jingqiang Guo Jun Qu Honert Dieter

【机构】

：

School of materials Science and Engineering, Southeast University, Nanjing 211189, China;Jiangsu Key

【出处】

：

The 14th International Congress on the Chemistry of Cement (

【发表日期】

：

2015年8期

【关键词】

：

constitutive relation calcium leaching degradation chemo-mechanical concrete

下载到本地 , 更方便阅读

下载此文赞助VIP

声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架

论文部分内容阅读

　　Based on the analysis and experimental results obtained from uniaxial and triaxial strain and stress relationship of leached concrete, an elastoplastic constitutive model coupled with leaching damage is formed.The plastic mechanism is related to deviatoric shearing and the leaching damage is identified as relative variation of porosity.Elastic and plastic properties are effect by leaching damage.Numerical simulations are compared with experimental data and good agreements have been obtained.

其他文献

宽级配粗粒土数值试验微观参数的敏感性分析

在离散元数值试验中,微观参数的取值直接决定着宏观参数.目前微观参数的研究多针对窄级配土、小尺寸的试样,基于宽级配粗粒土微观参数的研究较少.本文采用离散单元法,根据某水利工程宽级配粗粒料试验级配,采用常规大型三轴压缩试样尺寸,分析了线性接触模型中颗粒接触刚度和摩擦系数等微观参数对初始弹性模量、初始体积模量以及峰值强度的影响规律.研究发现:初始弹性模量和初始体积模量均随着刚度比的增大而减少,当刚度比较

会议

宽级配粗粒土微观参数接触刚度摩擦系数敏感性分析

基于神经网络算法的海上风机结构状态在线监测研究

海上风机受风、浪、流等多种随机荷载的作用,其结构状态关系到风电机组的安全和生产.本文拟采用静力分析方法结合风机结构模态分析,利用神经网络强大的映射功能进行风机结构状态监测研究.通过分析海上风机结构体系所受风、浪、流等环境荷载及其响应的特性，提出了海上风机结构状态监测的传感器布置原则，分析了神经网络应用于海上风机结构在线监测的可行性，讨论了输入输出量的获取方法，通过桶型基础过渡段的计算，神经网络具有

会议

风力机械结构状态在线监测神经网络

加锚结构面剪切破坏特性的模型试验研究

本文对平直型结构面锚固后的剪切破坏行为进行了室内模型试验,通过模型试验对不同锚固作用下的结构面剪切强度进行了研究,可知采用预应力锚索对结构面进行加固处理后,结构面抗剪强度和相应抗剪强度参数都有所提高.通过模型试验与理论分析,将加锚结构面中锚体随剪切位移增长所表现出来的阻滑抗剪作用大致分为预应力作用、销钉作用以及轴力增量阻滑三个方面.在推导的理论公式基础上,进行了室内平直结构面不同锚固条件下的模型试

会议

岩体工程加锚结构面剪切破坏特性室内模型试验加固处理预应力锚索

Elucidating Damage Mechanisms in Class H Cement from CO2 Sequestration

During carbon sequestration, wellbore cement could be vulnerable to high pressure and temperature in underground storage settings.Deterioration has been observed under supercritical CO2 exposure condi

会议

Class H cementCO2 sequestrationcompressive strengthmodulus of rupturescannin

Cases of concretes freeze resistance lack in new viaducts built during the winter time in the 2002-2

In the latest period hundreds of concrete viaducts were built in Poland within a short time range.Their characteristic feature was the use of high class concrete containing the CEM I 42,5 cement (stru

会议

concrete viaductsfrost resistance of concreteSEM and EDS analyses

Deterioration of the Concrete Elastic Properties Due to the Salt Frost Action

Fly ash air-entrained concrete specimens were tested in 3.5% NaCl solution with rapid freeze-thaw cycles.The relative dynamic modulus of elasticity and frost damaged layer thickness of concrete specim

会议

Fly ash air-entrained concretefreezing-thawing cyclesdurabilitymodulus of ela

Influence of nanoclay on concrete subjected to acid rain, seawater & freeze-thaw cycle

This paper explores the effects of nano-kaolinite clay (NKC) on the behavior of concrete, when exposed to an acidic, chloride, and freeze-thaw environment.Ordinary Portland cement was partially substi

会议

nanoclayacid rainchloridefreeze-thawconcrete

Interdependence between the particle size distributions of nano-dispersed mineral supplements with t

Decreasing of the durability of the concrete and reinforced concrete structures due to the alkali-silica reaction is actual problem worldwide.In 1968 at the first time it was reported about the destru

会议

alkali-silica reactiondurabilityparticle size distributionmetakaolinnano-sil

Diagnosis of a Subway Concrete Structure Affected by Alkali-Silica Reaction

The evaluation of alkali aggregate reaction in an existing subway tunnel is discussed in this paper.The petrographical examination of concrete thin sections was used to distinguish the alkali reactivi

会议

diagnosissubway concretealkali-silica reaction

Durability of Polypropylene Fiber Concrete Exposed to De-icing Salt Environment

In the cold snowy region of China, buildings usually expose to the marine environment and deicing salt.It is observed that the harmful environment accelerates the corrosion of steel structure and resu

会议

polypropylene fiber concretedurabilityfreezing-thawingde-icing saltchloride

Mechanical Modeling of Chemo-mechanical Coupling Behavior of Leached Concrete

与本文相关的学术论文