بررسی رفتار پانل های ساندویچی با مصالح شاتکریتی کم سیمان

نوع مقاله : پژوهشی

نویسندگان

1 دانشکده ی مهندسی عمران، دانشگاه سمنان

2 دانشکده ی مهندسی عمران ، دانشگاه سمنان

چکیده

در عصر حاضر، به افزایش سرعت و کاهش استفاده از آلاینده‌ها بیشتر از قبل توجه شده است. سازه‌های پیش‌ساخته ضمن افزایش سرعت ساخت و ساز، باعث صرفه‌جویی در زمان و منابع نیز می‌شوند. در مطالعه‌ی حاضر، از ترکیب سازه‌های پیش‌ساخته به همراه بنتونیت استفاده شده است. بنتونیت از جمله پوزولان‌هایی است که به راحتی استخراج می‌شود و از سیمان، هزینه‌ی تولید کمتری دارد. به این منظور از طرح اختلاط مبتنی بر بنتونیت استفاده و رفتار رفت و برگشتی بر روی ۶ نمونه بررسی شده است. بر اساس نتایج به دست آمده، نمونه‌ی ساخته شده از بنتونیت ۹۲\٪ بار نهایی، ۴۳\٪ انرژی جذب شده و ۶۱\٪ سختی نمونه‌ی شاهد را
به دست آورده و به میزان ۴۳\٪ شکل‌پذیرتر از نمونه‌ی شاهد بوده است. در پایان می‌توان گفت که نمونه‌ی ساخته شده از بنتونیت، مقاومت قابل قبولی در برابر نمونه‌های سیمان تولید و به خوبی انرژی سازه را جذب می‌کند.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of shear behavior of sandwich panel shotcreted by low-cement material

نویسندگان [English]

  • S. Safari 1
  • O. Rezaifar 2
  • M. Gholhaki 1
1 F‌a‌c‌u‌l‌t‌y o‌f C‌i‌v‌i‌l E‌n‌g‌i‌n‌e‌e‌r‌i‌n‌g S‌e‌m‌n‌a‌n U‌n‌i‌v‌e‌r‌s‌i‌t‌y
2 F‌a‌c‌u‌l‌t‌y o‌f C‌i‌v‌i‌l E‌n‌g‌i‌n‌e‌e‌r‌i‌n‌g S‌e‌m‌n‌a‌n U‌n‌i‌v‌e‌r‌s‌i‌t‌y
چکیده [English]

In modern life, with the advancement of science and technology, human need for prefabricated structures is felt more. Therefore, the study of prefabricated structures becomes very important. Lightweight prefabricated structures are among the items that need further studies and researches. These panels have high execution speed and are earthquake resistant. These elements are used as wall and ceiling in structures. It is necessary to study the shear capacity and performance of these lateral panels against and reciprocating loads.
In this study, the compatibility of prefabricated structures with nature and reduction of maximum pollution have been considered. For this purpose, an attempt is made to use materials compatible with nature and replace them with cement. This study is a laboratory study of the lateral bearing capacity of lightweight prefabricated panels and its integration with the desired materials. Five shear walls consisting of a thatched specimen and two specimens are made using bentonite. A one-story structure with bentonite was also examined and reinforced.
The results of the samples are presented in the form of hysteresis curves and push finally hardness diagram. Finally, the results are compared. The sample with a cement grade of 400 had the highest load capacity and was able to withstand 52.33 kN load. Also, the straw sample suffered the least load. The highest difficulty is related to the sample of a one-story building, followed by the cement sample with a grade of 400. The straw sample has the least hardness. The decrease in stiffness occurred in the samples with a steep slope. The amount of energy absorbed by each sample is equal to the area under the cover curve. The sample with a grade of 200 cement has the highest area under the curve, thus absorbing the highest amount of energy. The thatch sample absorbs the least amount of energy. The average ductility of a single-story structural sample is higher than that of other samples. The thatched specimen has the lowest ductility.

کلیدواژه‌ها [English]

  • Sandwich panels
  • load-bearing capacity
  • Shear Behavior
  • Shotcrete
  • Cement