بررسی رفتار سازه ای پانل های ساندویچی بتنی سقفی با رویه های مقاوم وهسته بتن سبک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه مهندسی عمران،واحد فیروزاباد، مرکز میمند،دانشگاه آزاد اسلامی،میمند ایران

2 مربی گروه مهندسی عمران واحد فیروزآباد مرکز میمند دانشگاه آزاد اسلامی

چکیده

در این مقاله سیستم پانل ساندویچی پیش‌ساخته جدید معرفی شده است. تحلیل اجزاء محدود پانل‌های ساندویچی بتنی پیش ساخته کامپوزیت جهت امکان استفاده آنها در ساخت و سازهای صنعتی مطالعه شده است. این پانل‌ها متشکل از سه لایه می باشند,لایه ها عبارتند از: یک لایه بتن مسلح معمولی یا بتن الیافی به عنوان لایه فوقانی، یک لایه ضخیم از بتن سبک به عنوان لایه میانی یا هسته و یک لایه بتن معمولی یا بتن سبک مسلح مقاوم در مقابل کشش به عنوان لایه تحتانی. رفتار سازه ای پانل های ساندویچی پیش ساخته تحت خمش بررسی شده است. برای این منظور، ابتدا چهار مدل پانل ساندویچی یک طرفه در نرم افزار ABAQUS مدل سازی شده و از لحاظ عملکرد سازه ای مورد بررسی قرار گرفته اند. تاثیرسختی اتصال دهنده های برشی که با توجه به قطر آنها اندازه گیری می شود بر روی مقاومت نهایی و عملکرد مرکب پانل های ساندویچی بررسی شده است. همچنین تاثیر جهت گیری اتصالات برشی در یک و دو جهت نیز مورد بررسی قرار گرفته است. نتایج نشان داد پانلهای ساندویچی با دو لایه بتن نسبت به پانلهای ساندویچی سه لایه ای دارای سختی کمتری در ناحیه خطی می باشند همچنین وقتی که پانل های ساندویچی پیش‌ساخته به عنوان دال یکطرفه رفتار می کنند، قراردادن اتصالات برشی موازی محورx(بعد بزرگتر) برای همبستگی لایه های بتنی به منظور عمل کردن آنها به عنوان یک واحد کافی است. مقاومت نهایی و عملکرد کامپوزیت پانلهای ساندویچی به سختی اتصالات برشی بستگی دارند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of the Structural Behaviour of the Concrete Composite Sandwich Panels-Type Flooring Made up of Resisting Facings and lightweight Concrete core

نویسندگان [English]

  • Babak Mansoori 1
  • allahdad ahmadi 2
1 Assistant Professor, Department of Civil Engineering, Firoozabad Branch, Meymand center, Islamic Azad University, Meymand,
2 instructor Department of civil Engineering Firoozabad Branch mymand center.
چکیده [English]

  In this paper a new system of precast concrete sandwich panels (PCSP) is introduced. Finite element analyses (FEA) were carried out to study the behavior of composite precast concrete sandwich panels (PCSP) in order to examine feasibility of their usage as slab elements in the construction industry. The panels are composed of three layers; an ordinary reinforced concrete or fiber-reinforced concrete as top layer، a thick layer of light-weight concrete as a middle layer or core and the third layer or lowest layer is a tensile resistant reinforced concrete or reinforced light-weight concrete. In this research, the structural behavior of precast concrete sandwich panels (PCSP) under flexure is studied. For this purpose, at first four model of one-way sandwich panels with the ABAQUS software was modeled and in terms of structural performance have been studied. The effect of steel shear connector’s stiffness as measured by its diameter on the ultimate strength and composite action of the panels was investigated. In addition, the effect and orientation of the shear connectors in one or two directions were also investigated. According to the results, the sandwich panels with two concrete layers had a smaller linear region stiffness than those with three concrete layers. When the prefabricated sandwich panels behave as one-way slabs, placing shear connectors parallel to the x-axis (larger dimension) is sufficient to bond two concrete layers for them to act as a single unit, The ultimate strength and the composite action of desired were found to depend to a large extent upon the stiffness of the shear connector used.

کلیدواژه‌ها [English]

  • Composite
  • lightweight Concrete
  • Fiber Concrete
  • Precast Concrete Sandwich Panel
  • Shear Connectors

مراجع

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سابقه مقاله

  • تاریخ دریافت: 17 مرداد 1402
  • تاریخ بازنگری: 12 آبان 1402
  • تاریخ پذیرش: 05 دی 1402

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