Construction Effects on the Mechanical States of a Truss Structure

Hui-pin, Chen; Yin, Shangwen; Qiao, Chuang; He, Jian; Hu, Muping

doi:10.1061/(asce)cf.1943-5509.0001630

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Simulation of time varying boundary conditions [30] For a large-span spatial structure, some degrees of freedom are released in the initial stage of construction. Constraints are imposed at the subsequent stage of construction or after molding, resulting in continuous changes in the boundary conditions of the structure.…”

Section: Analysis Difficulties Concrete Expressionmentioning

confidence: 99%

Key Component Capture and Safety Intelligent Analysis of Beam String Structure Based on Digital Twins

Zhu

Wang

2022

Symmetry

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In the construction process of beam string structures, the environmental effect and corresponding mechanical properties of the structure are complex. The problem of the misjudgment of structural safety performance caused by the uncertainty of a structural mechanical parameter analysis under various factors needs to be solved. In this study, a method for capturing key components and an intelligent safety analysis of beam string structures based on digital twins (DTs) was proposed. Combined with the characteristics of DTs mapping feedback, a component capture and security analysis framework was formed. Driven by twin framework, multi-source data for structural safety analysis were obtained and the parameter association mechanism established. Considering the space-time evolution and the interaction between the virtual and real elements of the construction process, a multidimensional model was established. Driven by the Dempster–Shafer (D–S) evidence theory, the fusion of structural mechanics parameters was carried out. The safety of the structure was analyzed intelligently by capturing key structural components, thereby providing a basis for the safety maintenance of the structure. The integration of DTs modeling and multi-source data improves the accuracy and intelligence of structural construction safety analysis. In the analysis process, capturing the key components of the structure is the core step. Taking the construction process of a string supported beam roof (symmetrical structure) in a convention and exhibition center as an example, the outlined research method was applied. Based on DTs and D–S evidence theory, the variation degree of mechanical parameters of various components under temperature was determined. By comprehensively investigating the changes of various mechanical parameters, the key components of the structure were captured. Thus, the intelligent analysis of structural safety was realized. The comparison of data verified that the intelligent method can effectively analyze the safety performance of the structure.

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Section: Analysis Difficulties Concrete Expressionmentioning

confidence: 99%

Key Component Capture and Safety Intelligent Analysis of Beam String Structure Based on Digital Twins

Zhu

Wang

2022

Symmetry

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“…The system was used to monitor both the stress and the dynamic response of the truss to assess the safety of the structure during the construction and operation period. Chen et al [18] pointed out that LSTS had complex stress conditions during the unloading procedure and investigated the performance of Harbin railway station structure during both synchronous and asynchronous unloading process based on FE method. Meanwhile, axial strain monitoring was conducted during the real unloading procedure and the monitoring data are in good agreement with the numerical results.…”

Section: Introductionmentioning

confidence: 99%

“…From the aforementioned literature, health monitoring for LSTS during construction, especially unloading process, is an effective way to ensure the structural safety. Usually, the strains of steel members are recorded by vibrational chord strain gauges and the displacements of key points are monitored by the total station on site [17][18][19]. Moreover, due to the effects of stacking sites, the component entry time and the construction schedule, the installation moment of vibrational chord strain gauges is not always the ideally non-loading status.…”

Section: Introductionmentioning

confidence: 99%

Construction process monitoring of a large-span steel truss roof based on response-increment comparison strategy

Tang,

Zhang,

Xia

et al. 2023

Meas. Sci. Technol.

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Large-span spatial structures, with good appearance and plasticity, are mostly used nowadays in urban landmarks. During its construction process, the loads are accumulated along with the construction conditions and the responses vary from the construction paths. Hence, a safety evaluation or monitoring for the construction process appears significant. During monitoring, the installation moment of strain gauges is always not the ideally non-loading status, the absolute or real strains in the structure components are difficult to acquire. Furthermore, the displacement monitoring for all key points reduces the construction efficiency. Herein, a response-increment real-time comparison strategy of stresses and unloading points’ displacements within numerical analysis is announced to avoid the above shortcomings. Based on a real large-span truss structure located in China, four construction schemes are proposed and researched by simulation method. With the proposed construction scheme and monitoring strategy, a stress and displacement monitoring for the large-span truss structure was conducted. Through the comparison between the monitoring and simulation data, the proposed strategy is verified feasible for the construction monitoring, the efficiency is accelerated and the safety is guaranteed.

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Hoisting Process Simulation and Monitoring of a S-Shaped Large- Span Spatial Truss

Liu,

Ding,

Jin

et al. 2024

Preprint

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The reconstruction of existing subway stations usually requires the maintenance of uninterrupted subway operation, and the construction technology of large-span spatial steel structures is particularly complex and difficult. This paper focuses on a S-shaped spatial truss with span of 88.7 m in the reconstruction project of a certain subway station. Firstly, based on the arrangement of temporary supports for the truss structure and the premise of uninterrupted subway operation, the scientific and feasible three-segment hoisting scheme was determined. That is, the S-shaped truss structures was divided into three segments for hoisting construction. Then, the software ABAQUS was used to simulate the entire process of three-segment hoisting. By comparing the stress and deformation characteristics of the truss structure during hoisting process, the reasonable hoisting point arrangement was determined. Finally, through reasonable three-segment hoisting measures and real-time monitoring of the hoisting process, it was found that the monitored stress data was basically consistent with the simulated results, thereby ensuring the accuracy of the construction of the S-shaped large-span spatial truss, the safety of the construction process, and providing valuable reference for the hoisting of relevant large-span spatial steel structures.

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Construction Effects on the Mechanical States of a Truss Structure

Cited by 4 publications

References 13 publications

Key Component Capture and Safety Intelligent Analysis of Beam String Structure Based on Digital Twins

Key Component Capture and Safety Intelligent Analysis of Beam String Structure Based on Digital Twins

Construction process monitoring of a large-span steel truss roof based on response-increment comparison strategy

Hoisting Process Simulation and Monitoring of a S-Shaped Large- Span Spatial Truss

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