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한국콘크리트학회|IJCSM 2022년 1월

논문명 An Experimental Study of Shear Resistance for Multisize Polypropylene Fiber Concrete Beams
저자명 (Xin Yang) ; (Ninghui Liang) ; (Yang Hu) ; (Rui Feng)
발행사 한국콘크리트학회
수록사항 IJCSM, Vol.16 No.1 (2022-01)
페이지 시작페이지(69) 총페이지(11)
ISSN 1976-0485
주제분류 재료 / 구조
주제어 ; fiber-reinforced concrete beam; polypropylene fibers; shear resistance; multisize; computational formula
요약2 To study the influence of polypropylene fibers with different thicknesses on concrete beams, inclined section shear tests of polypropylene fiber concrete beams were carried out. The cracking load, ultimate load, midspan deflection, reinforcement, and strain of polypropylene fiber concrete beams and conventional reinforced-concrete beams under shear were compared and analyzed. The load-bearing capacity of the rectangular beams was improved significantly by polypropylene fiber addition. Compared with conventional reinforced-concrete beams, the limit shear load of concrete beams with polypropylene fibers and multisize polypropylene concrete beams that were reinforced with three types of fibers increased by 8.67% and 17.07%, respectively. By mixing polypropylene fibers into concrete beams, the initial crack shear force of the beam was improved, the number of cracks was increased and the crack width was reduced, which can increase the beam ductility, inhibit crack formation and increase the strength. The computational formula of the shear ultimate bearing capacity of polypropylene fiber-concrete beams was revised according to composite material theory, and the calculated results were consistent with the test values.
소장처 한국콘크리트학회
언어 영어
DOI https://doi.org/10.1186/s40069-021-00492-7