在单调和循环水平负荷下,单基的轴承和变形特性
Jian Ma1,2, Junyue Xu2, Zhenkai Fan2
1College of Civil Engineering and Architecture, Wenzhou University, Wenzhou, China.
Science progress
|June 5, 2024
概括
沙子中的断基石表现出较低的承载能力和较高的加载高度的曲时刻. 循环负荷显著增加了峰值负荷,并改变了土壤周围的土壤刚性.
科学领域:
- 地质技术工程 地质技术工程
- 离岸结构 离岸结构
- 土壤力学 土壤力学
背景情况:
- 断基对于海上风能转换器和传输塔来说至关重要.
- 了解它们在单调和循环负荷下的行为对于结构设计至关重要.
- 土壤结构的相互作用显著影响了基础的性能.
研究的目的:
- 研究沙子中的单基的轴承和变形特性.
- 分析单调和循环水平负荷对单行为的影响.
- 为了探索装载高度,土壤相对密度和位移幅度的影响.
主要方法:
- 在受到水平负荷的单基上进行模型测试.
- 执行数值模拟来补充实验数据.
- 分析了不同装载高度,土壤密度和位移幅度的影响.
主要成果:
- 增加装载高度 (1D到4D) 降低了水平静态承载能力 (1.63-1.9倍) 并增加了峰值曲矩 (22.9%-36.8%).
- 在周期性负载下,峰值负载每增加1毫米位移幅度增加1毫米,增加31.7%-56.1%.
- 堆周围的土壤刚度最初下降,然后随着循环负荷增加而增加;土壤位移随着负荷和循环的增加向下延伸.
结论:
- 负载高度和循环负载特征显著影响单基础在沙子中的性能.
- 土壤的刚性和移位模式是动态的,并受到负载历史的影响.
- 调查结果为离岸基础的安全和高效设计提供了关键数据.
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