PRECISE MEASUREMENT METHOD OF INITIAL GEOMETRIC IMPERFECTIONS OF STEEL STRUCTURAL MEMBERS USING THREE-DIMENSIONAL LASER SCANNING

ZOU Yichong; HU Lili; FENG Peng; LI Qingwei; TENG Mingrui

doi:10.13204/j.gyjzG20110602

Volume 51 Issue 5

Sep. 2021

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ZOU Yichong, HU Lili, FENG Peng, LI Qingwei, TENG Mingrui. PRECISE MEASUREMENT METHOD OF INITIAL GEOMETRIC IMPERFECTIONS OF STEEL STRUCTURAL MEMBERS USING THREE-DIMENSIONAL LASER SCANNING[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 22-29. doi: 10.13204/j.gyjzG20110602

Citation:

ZOU Yichong, HU Lili, FENG Peng, LI Qingwei, TENG Mingrui. PRECISE MEASUREMENT METHOD OF INITIAL GEOMETRIC IMPERFECTIONS OF STEEL STRUCTURAL MEMBERS USING THREE-DIMENSIONAL LASER SCANNING[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 22-29. doi: 10.13204/j.gyjzG20110602

Citation:

ZOU Yichong, HU Lili, FENG Peng, LI Qingwei, TENG Mingrui. PRECISE MEASUREMENT METHOD OF INITIAL GEOMETRIC IMPERFECTIONS OF STEEL STRUCTURAL MEMBERS USING THREE-DIMENSIONAL LASER SCANNING[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 22-29. doi: 10.13204/j.gyjzG20110602

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PRECISE MEASUREMENT METHOD OF INITIAL GEOMETRIC IMPERFECTIONS OF STEEL STRUCTURAL MEMBERS USING THREE-DIMENSIONAL LASER SCANNING

doi: 10.13204/j.gyjzG20110602

1. Beijing Huayu Engineering Co., Ltd., China Coal Science and Technology Group, Beijing 100120, China;
2. Shanghai JiaoTong University, Shanghai 200240, China;
3. Tsinghua University, Beijing 100084, China;
4. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China

Received Date: 2020-11-11
Available Online: 2021-09-16
Publish Date: 2021-09-16

Abstract

Abstract

Initial geometric imperfection of steel structure is an important factor that affects mechanical performance, construction and installation. Traditional measurement methods have shortages such as low efficiency, incomplete data, and insufficient accuracy. High-precision point clouds of shape of steel members can be efficiently obtained by three-dimensional laser scanning. However, the processing method of the point clouds need to be developed. First, a digital model of structural member is developed, composing of three levels:component, section, and geometric element. Second, a modeling method of the digital model based on laser point cloud was proposed, including calibration of the inherent coordinate system, slicing and labeling member point cloud, segmenting and labeling section point cloud. Third, the calculation method of global and local initial geometric imperfections based on the digital model is proposed. The digital model abstracts geometric features while retaining precise scanning details. Finally, using a handheld 3D laser scanning device and self-made software BCModeler, initial global or local geometric imperfections of an H-section steel column and outer steel tube of a hybrid column are obtained, thus the effectiveness of the method is verified.
- 3D laser scanning,
- steel member,
- initial geometric imperfection,
- point cloud,
- 3D reconstruction

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References(21)

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