Terrestrial Laser Scanning-Based Deformation Analysis for Arch and Beam Structures

Yang, Hao; Xu, Xiangyang; Xu, Wei; Neumann, Ingo

doi:10.1109/jsen.2017.2709908

Cited by 16 publications

(15 citation statements)

References 26 publications

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“…It should be noticed that the tensile damage factor gradient line closely coordinated with the tensile shear-bending crack area in Figure 22, which is nearly horizontal at the shear wall edge while cline into an approximate 45-degree shear-bending crack at the middle part of shear walls. Figure 22 shows the crack distributions on experimental shear walls and the crack distribution area in a unidirectional loading closely coordinate with the concrete tensile damage ratio distribution [13,14]. e cracks were bending-shear cracks and concentrated at the rst oor but not at the second oor, indicating that the rst-oor shear walls are key components.…”

Section: Strength and Stiffness Strengths Of Finite-element Simulatimentioning

confidence: 78%

Finite‐Element Simulation on NPGCS Precast Shear Wall Spatial Structure Model

Liang²,

Shen

et al. 2019

Advances in Civil Engineering

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Seismic performance is basically required in precast shear wall. This study focuses on evaluation and improvement on precast shear wall seismic performance. By carrying out the finite-element simulation on a precast shear wall spatial model with new connector from a practical high-rise precast residential building, which was named as NPGCS and experimentally tested by low-cyclic reversed lateral loads in early studies, the performance results including strengths, stiffness, stress, and concrete damage ratio distributions were obtained, and the reliability of NPGCS spatial model was verified. According to the testing results, the finite-element simulation for the NPGCS spatial model is reliable and relatively accurate, especially for applying contact and beam elements into numerical analysis of precast interfaces and dowel shear actions, respectively. The strengths, stiffness, stress, and concrete damage ratio distributions from the simulation also supported the experimental results and conclusions.

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Section: Strength and Stiffness Strengths Of Finite-element Simulatimentioning

confidence: 78%

Finite‐Element Simulation on NPGCS Precast Shear Wall Spatial Structure Model

Liang²,

Shen

et al. 2019

Advances in Civil Engineering

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“…As terrestrial laser scanners have become more available, their applications have become more widespread. [16][17][18][19][20][21][22][23][24][25][26][27][28] Unfolding and projection of the point cloud A framework of crack extraction and analysis is presented in Figure 1 involving five steps. First, the 3D data of tunnel structures was collected utilizing TLS technology; second, we obtained the point cloud projection and transferred the point cloud data to an image file; third, we carried out image preprocessing; fourth, the automatic crack identification was programmed; and, finally, we analyzed the cracks of the tunnels.…”

Section: Tls Measurement and Data Processingmentioning

confidence: 99%

Intelligent crack extraction and analysis for tunnel structures with terrestrial laser scanning measurement

Yang

2019

Advances in Mechanical Engineering

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An automatic and intelligent method for crack detection is significantly important, considering the popularity of large constructions. How to identify the cracks intelligently from massive point cloud data has become increasingly crucial. Terrestrial laser scanning is a measurement technique for three-dimensional information acquisition which can obtain coordinates and intensity values of the laser reflectivity of a dense point cloud quickly and accurately. In this article, we focus on the optimal parameter of Gaussian filtering to balance the efficiency of crack identification and the accuracy of crack analysis. The innovation of this article is that we propose a novel view of the signal-to-noise ratio gradient for Gaussian filtering to identify and extract the cracks automatically from the point cloud data of the terrestrial laser scanning measurement.

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“…Several measurement technologies and corresponding analysis methods have been learned. [3][4][5] TLS technology has been adopted extensively in many fields, [6][7][8][9][10][11][12] such as civil engineering, to understand and monitor the deformation of structures. It is commonly used to create 3D point clouds or digital elevation models to describe and characterize deformation behavior and better analyze and understand surface processes by comparing multiple acquisitions over time.…”

Section: Tls Technologymentioning

confidence: 99%

Network method for deformation analysis of three-dimensional point cloud with terrestrial laser scanning sensor

Yang

2018

International Journal of Distributed Sensor Networks

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The complexity of structural materials is increasing the importance of the technology for high accuracy measurement. How to obtain the displacement information of structural feature points accurately and efficiently is the key issue of deformation analysis. In this article, displacement analysis of a composite arched structure is investigated based on the terrestrial laser scanning technique. A new method based on the measured point cloud is proposed to analyze the displacement of surficial points, resulting in not only the displacement size but also the displacement direction. The innovation lies in extracting the displacement information with a network and remapped point cloud, which is called the network method. The displacement map obtained demonstrates that the transverse displacement in the experiment plays an important role in the safety of the structure, which could not be observed and obtained by the surface approximation method. Therefore, the panorama-and pointwise displacement analysis technologies contribute to ensure the safety of increasingly complex constructions.

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Terrestrial Laser Scanning-Based Deformation Analysis for Arch and Beam Structures

Cited by 16 publications

References 26 publications

Finite‐Element Simulation on NPGCS Precast Shear Wall Spatial Structure Model

Finite‐Element Simulation on NPGCS Precast Shear Wall Spatial Structure Model

Intelligent crack extraction and analysis for tunnel structures with terrestrial laser scanning measurement

Network method for deformation analysis of three-dimensional point cloud with terrestrial laser scanning sensor

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