各种纳米粒子增强混凝土梁的曲和自由振动分析,这些梁靠在多参数弹性基础上
Soumia Dine Elhennani1, Zouaoui R Harrat1, Mohammed Chatbi1
1Laboratoire des Structures et Matériaux Avancés dans le Génie Civil et Travaux Publics, Djillali Liabes University, Sidi Bel-Abbes 22000, Algeria.
Materials (Basel, Switzerland)
|September 9, 2023
概括
将纳米粒子添加到混凝土梁中可以提高机械强度和自然频率. 这项研究使用高阶剪切变形理论和弹性基础模型分析了曲和振动.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 结构力学 结构力学
背景情况:
- 纳米粒子具有很高的表面积和无形的特性,从而产生出色的pozzolanic活动.
- 与氧化的反应形成了更多的C-S-H凝,增强了混凝土矩阵密度,强度和耐用性.
- 钢筋混凝土梁是关键的结构元素,需要对稳定性和动态行为的分析.
研究的目的:
- 进行各种纳米粒子增强的混凝土梁中曲和自由振动的比较分析.
- 研究纳米粒子类型,体积分数和几何参数对光束性能的影响.
- 评估不同土壤介质模型对钢筋混凝土梁结构行为的影响.
主要方法:
- 使用高阶剪切变形理论对钢筋混凝土梁的分析建模.
- 使用埃舍尔比模型推导等效纳米复合材料特性.
- 使用帕斯特纳克弹性基础 (温克勒弹和克尔基础) 模拟土壤介质,并通过汉密尔顿原理推导运动方程.
- 使用纳维尔的分析方法,获得简单支梁的封闭式解决方案.
主要成果:
- 纳米颗粒的结合显著提高了混凝土梁的机械阻力.
- 通过添加纳米粒子,光束的自然频率会被放大.
- 弹性基础模型表明,它对混凝土梁的曲和振动特征产生了重大影响.
结论:
- 纳米粒子增强增强了混凝土梁的结构完整性和动态性能.
- 选择弹性基础模型对于准确预测曲和振动行为至关重要.
- 这项研究为通过纳米粒子集成和基础设计优化混凝土结构提供了宝贵的见解.
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