A novel numerical approach and experimental study to evaluate the effect of component failure on spoke-wheel cable structure
A novel numerical approach and experimental study to evaluate the effect of component failure on spoke-wheel cable structure
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一种新颖的数值方法和实验研究，用于评估部件故障对辐轮缆索结构的影响
DOI：
10.1016/j.jobe.2022.105268
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发表时间：
2022-09
影响因子：
6.4
通讯作者：
Guoliang Shi
中科院分区：
文献类型：
--
作者：
Zhansheng Liu;Hang Li;Yue Liu;Jingchao Wang;T. Tafsirojjaman;Guoliang Shi
轮辐索结构的构件失效是当前结构工程界关注的热点问题。本文通过数值和试验研究了构件失效对轮辐索结构的影响。首先，介绍了一种基于建筑信息模型（BIM）和三维激光扫描（3DLS）的仿真修改新方法。在此基础上，对某典型辐条轮索结构的构件失效进行了有限元仿真。考虑了辐条缆索、杆和内环的断裂，以评估它们对辐条轮缆索结构行为的影响。验证了基于BIM + 3DLS的新方法带来的精度提高。在此基础上，基于修正有限元模型对构件失效后的结构可靠性进行了分析。结果表明，环索断裂导致结构整体倒塌，下辐索断裂导致结构可靠性指标为负，表明结构发生了破坏。而上辐索断裂后，可靠性指标仍为正，但部分节点出现较大位移。相比之下，杆的断裂对结构的影响相对较小，不会导致整个结构的破坏。此外，基于BIM + 3DLS的方法可以建立更精确的仿真模型，大大减少了索力和结构位移的计算误差。
The component failure of spoke-wheel cable structures is a major concern among the present structural engineering community. This paper investigated the effect of component failure on the spoke-wheel cable structures through numerical and experimental studies. Firstly, a new simulation modification method was introduced based on the building information modelling (BIM) and three-dimensional laser scanning (3DLS). Then, the finite element (FE) simulation was carried out using the original or modified model and related to the experimental study on the component failure of a typical spoke-wheel cable structure. Breakages of the spoke cables, poles, and inner-rings were considered to evaluate their influences on the behaviour of the spoke-wheel cable structure. The accuracy enhancement brought by the novel approach based on BIM + 3DLS was demonstrated. Furthermore, the structural reliability analysis after the component failure based on the modified FE model was conducted. The result indicates that the breakage of the ring cable caused the collapse of the entire structure and the breakage of the lower spoke cable led to a negative reliability index indicating a structural failure as well. However, after breaking the upper spoke cable, the reliability index remained positive, although large displacements occurred at some nodes. In contrast, the breakage of the pole had a relatively small influence on the structure and did not cause the failure of the whole structure. Moreover, the method based on BIM + 3DLS could help to establish a more accurate simulation model and reduce the calculation errors of the cable force and structural displacement significantly.
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