بررسی آزمایشگاهی رفتار خمشی و ضربه‌ای دال‌های بتنی الیافی انعطاف‌پذیر

نوع مقاله : پژوهشی

نویسندگان

دانشگاه سمنان

چکیده

ویژگی‌های نمونه‌های بتنی الیافی PVA و PP تحت آزمایش سقوط ضربه و استاتیکی خمشی با پنجاه و شش نمونه‌ پانل مسلح با الیاف در این مقاله بررسی شده‌اند که نتایج همگی حاکی از افزایش قابل‌توجه پارامتر‌های مؤثر در ضربه، اعم از مقاومت ضربه‌ای و میزان جذب انرژی می‌باشد. افزایش 50 درصدی الیاف PVA منجر به افزایش 54 درصد نیرو و افزایش دو برابری در میزان جذب انرژی می‌شود و نیروی در نمونۀ PVA با 3% الیاف، 87 درصد بیش از نیرو در نمونۀ PP با مقدار الیاف مشابه است. مقاومت ضربه‌ای نمونه‌های دارای الیاف PVA تقریباً سه‌برابر نمونه‌های دارای الیاف PP به‌دست آمده است.

کلیدواژه‌ها

عنوان مقاله [English]

Experimental Investigation of Flexural and Impact Behaviour of Flexible FRC Slabs

نویسندگان [English]

  • Mohammad Karami
  • Mohammad Kazem Sharbatdar
Semnan University
چکیده [English]

The characteristics of PP and PVA FRC specimens under impact and flexural tests with totally 56 specimens were investigated in this paper. The test results indicated that effective parameters of impact were significantly increased and the specimen behavior were improved. The strength and energy absorption of rectangular specimens were respectively increased by 54 and 200% when the PVA fiber percentage was twice. Final strength PVA specimen with 3% fiber was 87% higher that of PP specimen with same fiber percentage. The impact strength of specimens reinforced with PVA fiber was three times of same specimen reinforced with PP fiber.

کلیدواژه‌ها [English]

  • Flexible FRC concrete
  • Impact strength
  • Energy Absorption
  • PVA fiber
  • Flexural capacity

مراجع

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