Abstract The replaceable coupling steel beam (RCSB) is an optimal component of earthquake-resilient structures. In practice, the RCSB is connected to RC shear wall using numerous bolts with a small construction tolerance of 2 mm. However, conventional methods to locate the bolt holes are mainly manual and rely on an approximate measurement, thus time-consuming and subjective. Addressing this issue, this paper describes a fully-automated method to locate the bolt holes in RC shear walls using the terrestrial laser scanning. Specifically, the bolt holes can be first detected by an effective boundary detecting technique and then accurately fitted with a robust random sample consensus algorithm. The proposed technique is validated with the experimental results including the radius and relative position estimations of bolt holes. The fully-automated method can therefore be adopted to locate the RCSBs.

中文翻译：

---

使用地面激光扫描自动定位可更换耦合钢梁

摘要 可更换连接钢梁（RCSB）是抗震结构的最佳构件。在实践中，RCSB 使用许多具有 2 毫米小施工公差的螺栓连接到 RC 剪力墙。然而，传统的螺栓孔定位方法主要是人工，并且依赖于近似测量，因此既费时又主观。针对这个问题，本文描述了一种使用地面激光扫描定位钢筋混凝土剪力墙螺栓孔的全自动方法。具体来说，可以先通过有效的边界检测技术检测螺栓孔，然后再使用稳健的随机样本一致性算法进行精确拟合。所提出的技术通过包括螺栓孔半径和相对位置估计在内的实验结果得到验证。