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Số người truy cập: 107,342,070

 Experimental study of flexural behaviour of high strength steel (HSS)‐Engineered Cementitious Composites (ECC) composite beam with profiled steel sheeting
Tác giả hoặc Nhóm tác giả: Cong‐Luyen Nguyen, Chi‐King Lee
Nơi đăng: ce/papers; Số: 2-4;Từ->đến trang: 781-786;Năm: 2021
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
Due to its high compressive strain of at least 0.5%, which is higher than both the yield strain (0.35%) of high strength steel (HSS) and the compressive strain (0.23%) of normal strength concrete (NSC), Engineered Cementitious Composites (ECC) is a material with high potential to replace NSC in HSS composite beam construction. This study reports an experimental investigation on the flexural behaviour of HSS-ECC composite beam fabricated by using HSS I-section in conjunction with hybrid polyethylene-steel fibers (PE-ST) ECC slab. Shear connection between the HSS I-section and the top PE-ST ECC slab was constructed by using normal profiled steel sheeting and headed shear studs. A HSS-ECC composite beam and a HSS-NSC composite beam were cast and tested under four-point bending. The test results revealed that a large area of HSS I-section in HSS-ECC composite beam yielded compared to only a small yielded area of which in the HSS-NSC counterpart despite the fact that both composite beams have identical configuration and silimar mechanical properties. The HSS-NSC beam underwent longitudinal shear failure while in contrast, the HSS-ECC beam failed by flexure and exhibited great ductility.
ABSTRACT
Due to its high compressive strain of at least 0.5%, which is higher than both the yield strain (0.35%) of high strength steel (HSS) and the compressive strain (0.23%) of normal strength concrete (NSC), Engineered Cementitious Composites (ECC) is a material with high potential to replace NSC in HSS composite beam construction. This study reports an experimental investigation on the flexural behaviour of HSS-ECC composite beam fabricated by using HSS I-section in conjunction with hybrid polyethylene-steel fibers (PE-ST) ECC slab. Shear connection between the HSS I-section and the top PE-ST ECC slab was constructed by using normal profiled steel sheeting and headed shear studs. A HSS-ECC composite beam and a HSS-NSC composite beam were cast and tested under four-point bending. The test results revealed that a large area of HSS I-section in HSS-ECC composite beam yielded compared to only a small yielded area of which in the HSS-NSC counterpart despite the fact that both composite beams have identical configuration and silimar mechanical properties. The HSS-NSC beam underwent longitudinal shear failure while in contrast, the HSS-ECC beam failed by flexure and exhibited great ductility.
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