شبیه‌سازی مود برشی مکانیک شکست در اتصال سرد بتنی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران، واحد بندرگز، دانشگاه آزاد اسلامی، بندرگز، ایران

2 دانشکده عمران، دانشگاه صنعتی شاهرود، شاهرود، ایران

چکیده

در این تحقیق به شبیه‌سازی مود برشی (مود دوم) مکانیک شکست در اتصال سرد بتنی پرداخته شده است. شبیه‌سازی با استفاده از تحلیل استاتیکی غیرخطی مصالح و هندسه انجام شده است. نمونه‌های استفاده شده جهت مدل‌سازی، نمونه‌های S شکل مورد استفاده در آزمایش پوش-آف می‌باشند. مدل‌سازی نمونه‌ها در سه وضعیت با 2، 4 و 6 آرماتور دوخت انجام شده و با نتایج حاصل از نمونه‌های آزمایشگاهی نظیر، صحت‌سنجی شده‌ است. نتایج تحلیل بیانگر این است که روش پیشنهاد شده به خوبی توانایی شبیه‌سازی رفتار مود دوم مکانیک شکست در اتصال سرد بتنی را دارا می‌باشد. روش شبیه‌سازی پیشنهادی می‌تواند جهت بررسی رفتار قاب‌های بتن‌آرمه دارای اتصال سرد و همچنین قاب‌ها و اعضای بتن‌آرمه‌ای که مورد تقویت، تعمیر یا ترمیم قرار گرفته‌اند، مفید باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Simulation of Shear Mode in Fracture Mechanics of Concrete Cold-Joint

نویسندگان [English]

  • Ehsan Karimi 1
  • Vahid Reza Kalatjari 2
1 Department of Civil Engineering, Bandargaz Branch, Islamic Azad University, Bandargaz, Iran
2 Department of Civil Engineering, Shahrood University of Technology, Shahrood, Iran
چکیده [English]

This paper presents a model to simulate shear mode (mode II) of fracture mechanics in concrete cold-joint. The simulation is performed using nonlinear static analysis of materials and geometry. The specimens used for modeling are S-shaped specimens used in the push-off test. The specimens modeled in three situations with 2, 4, and 6 steel connectors and validated with the results of corresponding the experimental specimens. The results of the analysis show that the proposed method has a good ability to simulate the behavior of the shear mode of fracture mechanics in concrete cold-joint. The proposed simulation method can be useful to investigate the behavior of reinforced concrete frames with cold-joint and repair, retrofitting, and strengthening reinforced concrete structures.

کلیدواژه‌ها [English]

  • Cold-Joint
  • Shear Mode of Fracture Mechanics
  • Push-off Test
  • Shear-Friction
  • Steel Connectors
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