تعیین تنش برشی و نرمال در مرز مشترک بتن و ورق FRP به روش بدون المان گالرکین و مقایسه نتایج آن با نرم افزار المان محدود آباکوس

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری دانشکده فنی مهندسی گیلان

2 استادیار ، گروه عمران، دانشکده فنی، دانشگاه گیلان، رشت، ایران.

10.22124/jcr.2023.22897.1595

چکیده

در این مقاله، مدلی بر اساس روش المان آزاد گلرکین (EFG) در چارچوب فرض‌های الاستیک خطی، برای به دست آوردن توزیع تنش بین سطحی در تیر بتنی تقویت شده با ورق FRP توسعه داده شده است. در این مدل، رفتار لایة چسب میان سطوح با استفاده از خواص الاستیک آن به صورت فنرهایی خطی در نظر گرفته شده است و از توابع تقریب MLS برای تقریب کل میدان‌های جابجایی استفاده شده است. همچنین با در نظر گرفتن شرط چسبندگی کامل میان سطوح نیز نتایج محاسبه و ارائه گردیده است. نتایج این مدل با مدل FEM در نرم‌افزار آباکوس برای تیر و ورق FRP مقایسه شده است. نتایج نشان می دهد که روش EFG انطباق خوبی با نتایج مدل آباکوس دارد نتایج مناسبی را نشان می دهد. در انتهای کار مطالعه پارامتریک انجام شده است و تاثیرات ضخامت لایه چسب و ورق FRP در مقادیر تنش برشی و نرمال چسب بررسی شده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Determining the shear and normal stress in boundary between concrete and FRP sheet by the Element Free Galerkin method and comparing its results with the finite element software ABAQUS

نویسندگان [English]

  • mojtaba haghgoo 1
  • Arash Bahar 2
1 PhD candidate, Department of civil engineering, University of Guilan, Rasht, Iran
2 Assistant professor, Department of civil engineering, University of Guilan, Rasht, Iran.
چکیده [English]

A model based on the Element Free Galerkin (EFG) method in the framework of linear elastic assumptions was developed to determine the distribution of interfacial stress in a concrete beam reinforced with FRP plates. In this model, the behavior of the adhesive layer between the surfaces is considered like a linear spring using its elastic properties, and MLS approximation functions are used to approximate the total displacement fields. In addition, the results were calculated and presented under the condition of complete adhesion between the surfaces. The results of the model were compared with the FEM model in Abaqus software for concrete beam and FRP panel. The results show that the EFG method has a good agreement with the outputs of the Abaqus model. To conclude this work, a parametric study was performed. It shows how the thickness of the adhesive layer and the FRP plate affect the shear and normal stress values of the adhesive.

کلیدواژه‌ها [English]

  • FRP sheet
  • adhesive layer
  • shear stress
  • normal stress

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