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grout 2

bleeding 1

cement grout 1

concrete 1

finite element 1

flowability 1

high strength steel 1

pre-placed 1

prestressing 1

tubular members 1

two-stage concrete (TSC) 1

ultra-fine slag 1

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Properties of cement grout modified with ultra-fine slag

Sowmini GOPINATHAN, K B ANAND

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1, Pages 58-66 doi: 10.1007/s11709-017-0383-0

Abstract: The purpose of the study is to obtain a cement grout with improved performance.The grout mixes of the present study contain cement, ultra-fine slag (UFS), super plasticizer and waterRheological parameters were also studied in order to explain the grout workability.can be used as a supplementary cementitious material in cementitious grouts in order to improve the grout

Keywords： cement grout ultra-fine slag flowability bleeding viscosity

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A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1, Pages 10-22 doi: 10.1007/s11709-019-0547-1

Abstract: The structural behavior of prestressed high strength steel (HSS) tubular members is investigated through the execution of advanced finite element modeling. Numerical models are developed and validated against published experimental data on HSS tubular members subjected to different levels of initial prestress and loaded either in tension or compression. The effect of the presence or absence of grouting on the strength and ductility of the members is also considered. To numerically replicate the structural response recorded in the tests, some key modeling features including the employed numerical solver, the adopted material models and the element types warrant careful consideration. Upon developing of the finite element models, the numerically generated ultimate loads, the corresponding failure modes and the full load-deformation curves are compared to the experimental ones, indicating a successful validation. As anticipated, prestressing enhances the load-bearing capacity for the tensile members, whereas it is detrimental for the compressive ones. A series of parametric studies is performed to assess the influence of key factors on the structural response of prestressed HSS members and the obtained results are discussed. Design guidance for tensile and compressive prestressed tubular members is also provided.

Keywords： finite element prestressing tubular members grout high strength steel

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Investigation into viability of using two-stage (pre-placed aggregate) concrete in Irish setting

John O’MALLEY, Hakim S. ABDELGADER,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 127-132 doi: 10.1007/s11709-010-0007-4

Abstract: aggregate) concrete (TSC) consists of coarse aggregate, which is first deposited into the formwork, and groutDuring the course of this study the formation of grout for two stage concrete was investigated usingslow speed mixer in combination were found to be not conducive to the successful production of TSC grout

Keywords： grout pre-placed concrete two-stage concrete (TSC)