间隔分析的应用,以评估在加速腐蚀测试中混凝土覆盖的退化
Faustyn Recha1, Kseniya Yurkova2, Tomasz Krykowski2
1Faculty of Architecture, Civil Engineering and Applied Arts, Academy of Silesia, Rolna 43, 40-555 Katowice, Poland.
Materials (Basel, Switzerland)
|September 9, 2023
概括
本研究应用间隔代数来建模混凝土中铁杆腐蚀,并考虑参数不确定性. 这些发现有助于预测结构损坏,提高钢筋混凝土的耐用性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
背景情况:
- 钢筋混凝土结构容易受到铁杆腐蚀的影响,导致材料降解和潜在的故障.
- 精确建模腐蚀引起的损伤对于评估结构完整性和确保安全至关重要.
- 材料特性和环境因素的不确定性使损害预测变得复杂.
研究的目的:
- 应用间隔代数在相亲的配方中,以评估在加快铁杆腐蚀下在钢筋混凝土元素中的损伤传播.
- 将参数不确定性纳入腐蚀损害评估模型.
- 通过实验数据和蒙特卡洛模拟来验证拟议的模型.
主要方法:
- 利用间隔代数在一个亲属的配方来建模腐蚀诱导的损害.
- 引入了对体积应变速度的间隔张量,以捕捉腐蚀相互作用.
- 使用有限元法 (FEM) 与ANSYS和ATENA软件分析混凝土模型 (局部和梯度配方,具有降解,弹性和弹性-塑料行为).
- 执行了计算机计算,参数不确定性为0%,10%和20%.
- 使用蒙特卡洛方法验证结果,参数被视为均分布的随机变量.
主要成果:
- 该研究成功地应用了间隔代数来模拟腐蚀下的钢筋混凝土中的损伤传播.
- 该模型有效地捕捉了参数不确定性对腐蚀引起的损伤的影响.
- 计算结果与加速腐蚀测试中的实验数据相一致.
- 蒙特卡洛模拟证实了区间代数方法用于处理参数不确定性的有效性.
结论:
- 间隔代数为评估有不确定参数的钢筋混凝土中腐蚀引起的损伤提供了一个强大的框架.
- 亲缘配方和间隔张量方法提高了损害预测的准确性.
- 经过验证的模型可以成为结构健康监测和暴露于腐蚀的混凝土结构的风险评估的宝贵工具.
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