Seismic behaviour of innovative composite walls with high-strength manufactured sand concrete

Guan, Minsheng; Liu, Wenting; Lai, M.H.; Du, Hongbiao; Cui, Jie; Gan, Yangyu

doi:10.1016/j.engstruct.2019.05.096

Cited by 66 publications

(13 citation statements)

References 45 publications

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“…The ductility can be calculated by the maximum deformation of members or structures over that of yield value ratio, in which the deformation is broadly expressed as rotation, curvature or displacement. For instance, the ductility ratio related to the displacement of a structure is defined as (1) where, denotes the ductility ratio; represents the maximum displacement, and is the yield displacement obtained by the R-park method [17]. The same as ductility ratio, drift ratio is commonly utilized as a crucial performance index in the seismic design of buildings as well.…”

Section: Deformation-based Indicesmentioning

confidence: 99%

Evaluation of Damage Indices for Rectangular Concrete-filled Steel Tube Structures

Guan

Lin

et al. 2019

Measurement Science Review

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The paper aims to select a simple and effective damage index for estimating the extent of damage of rectangular concrete-filled steel tube (RCFT) structures subjected to ground motions. Two experimental databases of cyclic tests conducted on RCFT columns and frames are compiled. Test results from the database are then used to evaluate six different damage indices, including the ductility ratio (μ), drift ratio, initial-to-secant stiffness ratio (DKJ), modified initial-to-secant stiffness ratio (Dms), energy coefficient (E), and the combined damage index (DPA) as a benchmark indicator. Selection criteria including correlation, efficiency, and proficiency are utilized in the selection process. The optimal alternative for DPA is identified on the basis of a comprehensive evaluation. The evaluations indicate that Dms previously proposed by some of the authors is the most appropriate substitution of DPA, followed by the drift ratio. For the case of the slenderness ratio less than or equal to 30, the same grades of relation between the investigated damage indices and the benchmark are observed. However, in the case of the slenderness ratio larger than 30, the drift ratio tends to be the optimal alternative. In most cases, μ is proved to be an inadequate replacement of DPA.

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Section: Deformation-based Indicesmentioning

confidence: 99%

Evaluation of Damage Indices for Rectangular Concrete-filled Steel Tube Structures

Guan

Lin

et al. 2019

Measurement Science Review

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“…SCC has excellent filling and passing abilities that enable it to fill all recesses, spaces and voids without sign of segregation so as to prevent to prevent plastic settlement cracks that improves the durability 1,2 and reduces carbon footprint of structures 3–5 . It particularly facilitates the concrete placement in structural member with congested steel reinforcement 6–9 or concrete‐filled‐steel tube member when limited vibration is permitted 10–17 . It also makes the concrete production more homogenous and efficient.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5] It particularly facilitates the concrete placement in structural member with congested steel reinforcement [6][7][8][9] or concrete-filled-steel tube member when limited vibration is permitted. [10][11][12][13][14][15][16][17] It also makes the concrete production more homogenous and efficient. In construction, the placement of SCC can be easily speeded up, and the quantity of concrete labor can be reduced that minimizes the construction cost.…”

Section: Introductionmentioning

confidence: 99%

Impact of condensed silica fume on splitting tensile strength and brittleness of high strength self‐compacting concrete

Wang

Yao

et al. 2021

Structural Concrete

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Self‐compacting concrete (SCC) is a type of concrete that can consolidate itself without external compaction. High‐strength SCC (HS‐SCC) is becoming more popular having a very broad range of application in Civil Engineering, such as piles, columns of tall buildings and piers for long‐span bridges. However, HS‐SCC is very brittle that limits its application above. To this, present study aims at mitigating the brittleness of HS‐SCC having a fixed water/binder ratio of 0.30 and binder content of 500 kg/m3 by blending cement with condensed silica fume (CSF). The percentage of CSF that replaced cement was 0–15% by weight. Apart from measuring the brittleness, mechanical property such as splitting tensile and compressive strength, as well as fresh property, such as slump flow, V‐funnel time, and L‐box passing ability was also obtained. The experimental results indicated that 10% replacement of cement by CSF could effectively decrease the brittleness of HS‐SCC and simultaneously increase the 28‐day compressive strength. On the other hand, the slump flow of concrete decreased as the content of CSF increased, but nonetheless was able to maintain at above 600 mm, which is a commonly accepted criteria for SCC. Lastly, scanning electron microscope figures showed that the microstructure of concrete and hydration morphology were enhanced by CSF particle.

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“…When shrinkage movement is restrained, it can cause differential settlement, tension cracks due to shrinkage stress, 13,14 debonding of concrete from steel [15][16][17] in concrete-filled-steel-tube columns, [18][19][20][21][22][23][24][25][26] FRP-confined concrete columns, [27][28][29] and other composite structures. 30,31 All the above will impair the durability of concrete structures and incur costly maintenance work, particular in high-strength concrete members where the shrinkage is more significant due to larger cementitious paste volume (CPV). [32][33][34] Shrinkage of concrete cannot be eliminated completely due to the property of cement hydration, variation of environmental humidity, and porous structure of cementitious paste.…”

Section: Introductionmentioning

confidence: 99%

Shrinkage, cementitious paste volume, and wet packing density of concrete

Lai

Binhowimal

Griffith

et al. 2020

Structural Concrete

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Shrinkage of concrete refers to the volumetric change of concrete due to cement hydration (i.e., self-desiccation) and environmental drying (i.e., water evaporation). It creates dimensional instability and induces tensile stress when the concrete is restrained that may be large enough to cause cracking. The most fundamental way to mitigate concrete shrinkage is to decrease the shrinkage of cementitious paste in the mix design. Some major factors of concrete mix design affecting the shrinkage include water-to-cementitious material (W/CM) ratio, dosage of superplasticizer (SP), concrete strength, and cementitious paste volume (CPV). While the effects of concrete strength and CPV on shrinkage are straightforward, those of W/CM and SP are more complicated because they also affect the pore size and distribution that influence the moisture movement. In this paper, it is advocated to study the concrete shrinkage by its wet packing density (WPD). Considering that the shrinkage of concrete is associated with the moisture movement in capillary pores and that the WPD accounts for the void ratio in fresh concrete, it will be shown in this paper that the shrinkage can be correlated negatively to the WPD with the consideration of CPV. The paper thus provides a new insight to the interdependence amongst shrinkage, CPV, and WPD of concrete.

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Seismic behaviour of innovative composite walls with high-strength manufactured sand concrete

Cited by 66 publications

References 45 publications

Evaluation of Damage Indices for Rectangular Concrete-filled Steel Tube Structures

Evaluation of Damage Indices for Rectangular Concrete-filled Steel Tube Structures

Impact of condensed silica fume on splitting tensile strength and brittleness of high strength self‐compacting concrete

Shrinkage, cementitious paste volume, and wet packing density of concrete

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