Equivalent Flexural Strength Of Steel Fibre Reinforced Concrete And Its Modelling From Fibre Distribution And Fibre Pull Out Load
Penulis Utama
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Sholihin As ad
NIM / NIP
:
×This thesis presents the laboratory tests about the assessment of flexural and equivalent flexural strength of steel fibre reinforced concrete (SFRC) and its dependence o n fibre factors (e.g. dosage, shape geometry, etc.) and concrete quality. The analysis is supported by fibre pullout test, investigation of the cracked zone of the specimen, where fibres contribute to the material resistance against the tensile flexural stress and development of a calculation model for reconstructing the load deflection curve of fourpoint bending test. The work sequence are (1) the fourpoint bending test to investigate the dependence of fibre type and concrete quality to flexural and equivalent flexural strength, (2) the investigation of the craked zone of tested beams to evaluate the involved amount of fibres and their distribution, 3) fibre pullout test to understand the fibre pullout behavior as micro component of SFRC and (4) development of a calculation model based o n fibre pullout load to reconstruct the loaddeflection curves of the tested beams in fourpoint bending test. The fourpoint bending test covers series with various dosage of crimped and endhooked steel fibres mixed in normal and high strength concrete, variation of sand content mixed with 40 kg/m3 of short and long endhooked steel fibres in normal and high strength concrete and the comparison of specimen with 40 kg/m3 of different fibre types (short and long crimped steel fibres, short, medium and long endhooked steel fibres, long crimped endflatted and straight endcapped steel fibres). The evaluation of the cracked zone of tested beams evaluates the number of fibres, fibre position and fibre distribution in the crack and its relation to the recorded loaddeflection curves. In the fibre pullout tests the influences of fibre type, shape, geometry, matrix quality and its orientation to acting force are investigated. In addition the effect of fibre bonding in the matrix by treatment of fibre surface with laminated epoxycement is tested. The results show that the flexural and equivalent flexural strength of SFRC are determined by fibre geometry, fibre distribution in crack and concrete quality. The variation of sand content in concrete mixture influences fibre distribution and slightlv influence post cracking behavior of the fourpoint bending test result. Fibre pullout test results indicate that pullout load depends o n fibre geometry, inclination to acting force, embedment and concrete quality. These results are then used for the development of a model which basically explains the postcracking behavior of SFRC as the interaction of force that necessary for increasing height and fibre pullout load resulting from the increase of crack width. With this model, loaddeflection curves are calculated o n the basis of determined fibre distribution in crack, the assoiated fibre pullout load and propagated crack height. The calculated loaddeflection curves are in good agreement with the measured curve. Therefore this model helps to understand postcracking behavior, which is expressed as equivalent flexural strength, of SFRC.
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Penulis Utama
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Sholihin As ad
Penulis Tambahan
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NIM / NIP
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Tahun
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2006
Judul
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Equivalent Flexural Strength Of Steel Fibre Reinforced Concrete And Its Modelling From Fibre Distribution And Fibre Pull Out Load
Edisi
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Imprint
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Surakarta  FT  2006
Program Studi
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Kolasi
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Sumber
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UNS FT Prog Studi Teknik Sipil NIP 132163507
Kata Kunci
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Jenis Dokumen
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ISSN
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ISBN
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Link DOI / Jurnal
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Status
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Public
Pembimbing
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Penguji
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Catatan Umum
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Fakultas
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Fak. Teknik
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