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铁路路堑稳定性是铁路安全的一个重要保障。本文利用Flac3D软件.基于Mohr—Coulomb屈服准则,对某铁路路堑进行了数值模拟计算,以确定其应力、位移状态及塑性区分布情况.进而分析和评价路堑安全性,最后得出Flac3D软件在铁路路堑稳定性分析中应用的合理性和适用性。 相似文献
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Recently, 3D concrete printing (3DCP) technology starts entering the market from factories and laboratories, contributing to the creation of new construction methods and architectural forms. However, since the technologies of most 3DCP institutions are independently developed, there is a lack of consensus in terms of construction methods and development approaches in the industry. In this paper, based on 42 3DCP architectural works completed in last five years, a quantitative analysis was made to evaluate the impacts of the fabrication system on 3DCP building forms. The paper introduced three criteria, including Workspace Index, Geometric Complexity Index, and Tectonic Prospect Index, analyzing and answering the discussions about “adopting in-situ printing or prefabrication”, “using gantry printers or robotic arms” from the perspective of architectural form. By analyzing specific construction methods and design strategies in these projects, the research summarized three development trends, “mobile equipment, algorithmic structure, and intelligent construction”, which will affect the future development of 3DCP building forms. Finally, the paper discussed the advantages, limitations, and potential of four different 3DCP fabrication systems, expecting to point out the directions to further optimize each system and realize more diverse 3DCP buildings. 相似文献
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《岩石力学与岩土工程学报(英文版)》2023,15(1):204-215
This study presents a visualized approach for tracking joint surface morphology. Three-dimensional laser scanning (3DLS) and 3D printing (3DP) techniques are adopted to record progressive failure during rock joint shearing. The 3DP resin is used to create transparent specimens to reproduce the surface morphology of a natural joint precisely. The freezing method is employed to enhance the mechanical properties of the 3DP specimens to reproduce the properties of hard rock more accurately. A video camera containing a charge-coupled device (CCD) camera is utilized to record the evolution of damaged area of joint surface during the direct shear test. The optimal shooting distance and shooting angle are recommended to be 800 mm and 40°, respectively. The images captured by the CCD camera are corrected to quantitatively describe the damaged area on the joint surface. Verification indicates that this method can accurately describe the total sheared areas at different shear stages. These findings may contribute to elucidating the shear behavior of rock joints. 相似文献
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岩土工程课程是一门理论与实践紧密结合的课程,教学内容涉及边坡工程、地下工程、工程岩体等复杂“立体式”结构,传统“平面式”教学的效果往往不佳,学生难以具体且形象地掌握边坡或地下等复杂工程的结构特征。针对这一难题,探索结合虚拟场景和3D打印技术的“虚实结合”教学模式和平台建设,并在课程教学中结合岩土工程实例进行实践应用。实践表明:学生在虚拟场景学习岩土工程的复杂结构,有效解决了学生现场考察面临的成本高、周期长、潜在风险高等不利问题,也更能激发学生的学习兴趣。通过3D打印技术,将虚拟场景和数字模型实体化,能培养学生的实际动手能力和创新思维,提高岩土工程类课程的教学质量。在新工科建设要求背景下,也为学生课外创新性试验等活动提供了平台,有利于教研相长和师生的良性互动。 相似文献