| 摘要: |
| 针对水泥砂浆材料，以干湿循环次数和硫酸盐溶液浓度为试验参数，研究硫酸盐干湿循环腐蚀对水泥基材料力学性能的影响.基于连续介质损伤力学基本理论，根据试验结果，建立了硫酸盐侵蚀水泥基材料的弹塑性化学损伤本构模型.模型计算结果与试验数据对比表明，所建立的模型能够很好地预测受腐蚀水泥基材料在受压作用下的弹性、塑性及损伤特征. |
| 关键词: 水泥基材料 力学性能 本构模型 硫酸盐侵蚀 损伤 |
| DOI：103969/j.issn1007 9629201306003 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51009061，51137002）；江苏省基础研究计划重点研究专项（BK2011026） |
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| Mechanical Property and Constitutive Model of CementitiousMaterials Subjected to Sulfate Attack |
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CHEN Da, LIAO Ying di, HOU Li jun, OUYANG Feng
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Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Hohai University, Nanjing 210098, China
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| Abstract: |
| The mechanical behaviors of mortar subjected to coupled sulfate attack and dry wet cycles are investigated. The various parameters include the number of dry wet cycles and the concentration of sulfate solution. Based on the continuum damage mechanics theory and experimental data, the elastoplastic chemical damage constitutive model is proposed for cementitious materials under sulfate corrosion. Comparison between numerical simulations and tested results reveals that the proposed model can well predict the elastic, plastic and damage characteristics of corroded cementitious materials under compressive force. |
| Key words: cementitious material mechanical property constitutive model sulfate attack damage |
