关于堆形状和加载方向对沙子中的位移堆的横向反应的影响的数值研究
Wei Liu1, Hui Li2, Xianjie Weng3
1Jiangxi Jiahe Engineering Consulting and Supervision Co., Nanchang, China.
数字模拟显示,方形堆提供更高的横向承载能力,而不是圆形堆在盖巴沙. 改变方形堆的加载角度可以提高土壤的动员和容量,而增加堆的长度可以最大限度地减少形状和方向的影响.
科学领域:
- 地质技术工程 地质技术工程
- 计算力学 计算力学 计算力学
- 土壤力学 土壤力学
背景情况:
- 了解横向负载下的堆行为对于基础设计至关重要.
- 形状,加载方向和长度显著影响负载转移和土壤相互作用.
- 格巴沙的独特特性需要特定的构成模型来准确模拟.
研究的目的:
- 为了研究堆形状,装载方向和长度对盖巴沙中的横向装载堆的影响.
- 通过有限元分析分析横向负载转移曲线和土相互作用.
- 在不同的条件下比较圆形和方形堆的性能.
主要方法:
- 用基巴沙的低塑性构成模型进行了有限元数值模拟.
- 在有限元软件中使用了一个用户定义的材料 (UMAT) 子程序.
- 该模型的准确性与现有的离心机测试数据进行了验证.
主要成果:
- 与圆形相比,方形显示出更高的横向承载能力.
- 方形的45°加载方向通过调动更多的土壤,增加了横向承载能力.
- 增加堆长度减少了堆形状和装载方向对变形的影响.
结论:
- 堆形状和加载方向是侧面堆容量的关键因素,方形堆和角度加载显示优势.
- 的长度在减轻形状和加载方向的影响方面发挥着重要作用,特别是在7D之外.
- 经过验证的有限元模型为分析颗粒土壤中复杂的堆土相互作用提供了可靠的工具.
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