Nonlinear soil-structure behavior of a deployable and compliant anchor system
Nonlinear soil-structure behavior of a deployable and compliant anchor system
复制标题
可展开且柔顺的锚固系统的非线性土壤结构行为
DOI：
10.1139/cjce-2021-0204
复制
发表时间：
2021
影响因子：
1.4
通讯作者：
R. Beemer
中科院分区：
文献类型：
--
作者：
Ann C. Sychterz;Isabella Bernardi;J. Tom;R. Beemer
本文提出了一种新型的顺应性土工结构体系，其灵感来自于草籽上的芒，以增加锚固能力，同时最大限度地减少材料使用。柔顺可展开结构在这里被定义为通过持续的弹性形状变化来对全局位移做出反应的系统，而锥形结构是刚性连接到锚杆外部的细长柔性结构。当锚杆处于张拉状态时，防护罩会对土体产生反作用，并从桩身向外展开，从而为运输提供了节省空间的措施。建立了用于建立土芒变形和应力值的结构Pushover模型、利用加法制造制造的柔顺系统的比例模型、土芒相互作用的地塑性数值模型以及应用实例的有限元模型。这项研究阐明了芒子周围的土体位移机制，单个芒子的结构变形，以及芒子展开对整体锚固能力的增强。
This paper presents a novel compliant geo-structural systems bio-inspired by awns on grass seeds for increasing anchor capacity while minimizing material usage. A compliant deployable structure is here defined as a system that reacts to global displacements by continued elastic shape change and awns are slender flexible structures rigidly connected to the exterior of an anchor. When the anchor is loaded in tension, the awns react off the soil mass and deploy outwards from the pile shaft, enabling space-saving measures for transportation. This paper creates a structural pushover model to establish awn deformations and stress values, a scale model of the compliant system fabricated using additive manufacturing, geo-plasticity numerical models of soil awn interaction, and a finite element model of an example application. This research elucidates the soil displacement mechanisms around the awns, the structural deformation of individual awns, and the enhancement of overall anchor capacity due to awn deployment.