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Accurate Virtual Trial Assembly Method of Prefabricated Steel Components Using Terrestrial Laser Scanning
Advances in Civil Engineering ( IF 1.8 ) Pub Date : 2021-06-16 , DOI: 10.1155/2021/9916859
Yin Zhou 1 , Daguang Han 2 , Kaixin Hu 3 , Guocheng Qin 3 , Zhongfu Xiang 1 , Chunli Ying 3 , Lidu Zhao 1 , Xingyi Hu 4
Affiliation  

The comprehensive utilization of prefabricated components (PCs) is one of the features of industrial construction. Trial assembly is imperative for PCs used in high-rise buildings and large bridges. Virtual trial assembly (VTA) is a preassembly process for PCs in a virtual environment that can avoid the time-consuming and economic challenges in physical trial assembly. In this study, a general framework for VTA that is performed between a point cloud, a building information model (BIM), and the finite element method is proposed. In obtaining point clouds via terrestrial laser scanning, the registration accuracy of point clouds is the key to building an accurate digital model of PCs. Accordingly, an accurate registration method based on triangular pyramid markers is proposed. This method can enable the general registration accuracy of point clouds to reach the submillimeter scale. Two algorithms for curved members and bolt holes are developed for PCs with bolt assembly to reconstruct a precise BIM that can be used directly in finite element analysis. Furthermore, an efficient simulation method for accurately predicting the elastic deformation and initial stress caused by forced assembly is proposed and verified. The proposed VTA method is verified on a reduced-scale steel pipe arch bridge. Experimental results show that the geometric prediction deviation of VTA is less than 1/1800 of the experimental bridge span, and the mean stress predicted via VTA is 90% of the measured mean stress. In general, this research may help improve the industrialization level of building construction.

中文翻译:

基于地面激光扫描的预制钢构件精确虚拟试装配方法

预制构件(PC)的综合利用是工业建筑的特征之一。用于高层建筑和大型桥梁的 PC 必须进行试装。虚拟试装 (VTA) 是一种在虚拟环境中对 PC 进行的预装过程,可以避免物理试装中耗时且经济的挑战。在本研究中,提出了在点云、建筑信息模型 (BIM) 和有限元方法之间执行的 VTA 通用框架。在通过地面激光扫描获取点云时,点云的配准精度是构建准确的PC数字模型的关键。因此,提出了一种基于三角锥标记的精确配准方法。这种方法可以使点云的一般配准精度达到亚毫米级。为带有螺栓组件的 PC 开发了两种用于弯曲构件和螺栓孔的算法,以重建可直接用于有限元分析的精确 BIM。此外,提出并验证了一种有效的模拟方法,可以准确预测强制装配引起的弹性变形和初始应力。所提出的 VTA 方法在缩小比例的钢管拱桥上得到验证。实验结果表明,VTA的几何预测偏差小于试验桥跨度的1/1800,通过VTA预测的平均应力为实测平均应力的90%。总的来说,这项研究可能有助于提高建筑施工的产业化水平。为带有螺栓组件的 PC 开发了两种用于弯曲构件和螺栓孔的算法,以重建可直接用于有限元分析的精确 BIM。此外,提出并验证了一种有效的模拟方法,可以准确预测强制装配引起的弹性变形和初始应力。所提出的 VTA 方法在缩小比例的钢管拱桥上得到验证。实验结果表明,VTA的几何预测偏差小于试验桥跨度的1/1800,通过VTA预测的平均应力为实测平均应力的90%。总的来说,这项研究可能有助于提高建筑施工的产业化水平。为带有螺栓组件的 PC 开发了两种用于弯曲构件和螺栓孔的算法,以重建可直接用于有限元分析的精确 BIM。此外,提出并验证了一种有效的模拟方法,可以准确预测强制装配引起的弹性变形和初始应力。所提出的 VTA 方法在缩小比例的钢管拱桥上得到验证。实验结果表明,VTA的几何预测偏差小于试验桥跨度的1/1800,通过VTA预测的平均应力为实测平均应力的90%。总的来说,这项研究可能有助于提高建筑施工的产业化水平。
更新日期:2021-06-16
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