Simulation of Fatigue Fracture Detection of Bridge Steel Structures under Cyclic Loads

Yang, Dangfeng; Yao, Lixiao; Pang, Qi

doi:10.1155/2022/8534824

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…Large and complex steel structures widely appeared in contemporary architecture, such as stadiums [1], airports [2], bridges [3], and high-speed railway stations [4], because of their lightweight, high strength, and toughness. Typically, the steel structures are manufactured in industrial factories and transported to the site for installation after passing dimensional quality tests [5,6].…”

Section: Introductionmentioning

confidence: 99%

Intelligent Construction Monitoring Method for Large and Complex Steel Structures Based on Laser Point Cloud

et al. 2023

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Large and complex steel structures play a vital role in building construction. However, deviations between the design model and the actual construction state are inevitable, which seriously affects the quality and safety of building construction. In our study, an intelligent construction monitoring method for large and complex steel structures based on laser point cloud is proposed. Firstly, three-dimensional laser scanning technology is introduced to capture accurate and complete spatial information on steel structures. Then, considering the inconsistency of the coordinate system between the design model and the laser point cloud, the building information model (BIM) is converted into the point cloud model, and the datum unification of the two types of the point cloud is achieved by adopting a coarse-to-fine registration strategy. Finally, the spatial information of steel structures is extracted from the laser point cloud based on the as-designed model, and the distance deviation between the two models is analyzed to reflect the actual construction state. To demonstrate the applicability of the proposed method, the steel structures’ point cloud of the stadium and the high-speed railway station is captured by the terrestrial three-dimensional laser scanner. The experimental results demonstrate that the method can extract the deviation between the design model and the actual construction, to provide accurate data sources for the intelligent fine construction of steel structures.

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Section: Introductionmentioning

confidence: 99%

Intelligent Construction Monitoring Method for Large and Complex Steel Structures Based on Laser Point Cloud

et al. 2023

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Numerical modeling of cyclic softening/hardening behavior of carbon steels from low- to high-cycle fatigue regime

Fincato

Yonezawa

Tsutsumi

2023

Archiv.Civ.Mech.Eng

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The aim of this study is to characterize the stress–strain behavior of three construction steels (SM490, SM570, and F18B) through both experimental and numerical investigations. The material performance was evaluated by conducting tests on round bar specimens subjected to monotonic, fatigue, and incremental step fully reversed loading conditions. The experimental campaign was conducted to provide valuable information on the mechanical performances of the steels and data for calibrating the material constants required for numerical analyses. The numerical simulations aimed to demonstrate the effectiveness of the proposed unconventional plasticity model, the Fatigue SS model (FSS), in describing the non-linear behavior of the materials under a broad range of loading conditions, including stress states below and beyond the macroscopic yield condition. This aspect is a significant advantage of the FSS model, as conventional elastoplastic theories fail to provide a phenomenological description of inelastic material deformation under stress states within the yield condition. The good agreement between the experimental and numerical results confirms the validity of the calibration of the material constants and the reliability of the computational approach.

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Study on the parameters of steel plate reinforcement rib-deck crack considering local stress disturbances

Gao,

Ji,

et al. 2024

Advances in Structural Engineering

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Local reinforcement will change the local stiffness distribution of the component, causing perturbation effects on the local stress of the fatigue detail. Only considering the reinforcement effect may lead to excessive strengthening and induce new fatigue-prone points. For the fatigue detail of the rib-deck weld, steel plate reinforcement test and numerical simulations were conducted. The stress changes of the deck weld toe and weld root before and after reinforcement were analyzed. The influence of parameters such as steel plate length, thickness, and width on the reinforcement effect of the weld toe crack and local stress disturbance was discussed, and reasonable parameters were recommended. The results show that after the cracking of the weld toe, the stress concentration locations at the weld toe and weld root of the deck shift from the center of the specimen to the crack tip. Steel plate reinforcement can effectively restrain the crack propagation, but can lead to an increase in the stress at the deck weld root within the reinforced area. A good reinforcement effect can be achieved while the steel plate covers the crack, and further increasing the steel plate length has limited improvement on the reinforcement effect but reduces the adverse effect of steel plate reinforcement on the stress of the deck weld root. Increasing the steel plate width will increase the adverse effect of steel plate reinforcement on the deck weld root stress, and it is recommended to use steel plates with a length greater than 120 mm and a length-to-width ratio greater than 4 for reinforcement. Increasing the width of the steel plate has a relatively small effect on the reinforcement effect and the stress at the deck weld root, and steel plates with the same thickness as the deck are recommended.

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Simulation of Fatigue Fracture Detection of Bridge Steel Structures under Cyclic Loads

Cited by 3 publications

References 30 publications

Intelligent Construction Monitoring Method for Large and Complex Steel Structures Based on Laser Point Cloud

Intelligent Construction Monitoring Method for Large and Complex Steel Structures Based on Laser Point Cloud

Numerical modeling of cyclic softening/hardening behavior of carbon steels from low- to high-cycle fatigue regime

Study on the parameters of steel plate reinforcement rib-deck crack considering local stress disturbances

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