Structural health monitoring and performance analysis of a 12-story recycled aggregate concrete structure

Wang, Chunhui; Xiao, Jianzhuang; Zhang, Chuanzeng; Xiao, Xu

doi:10.1016/j.engstruct.2019.110102

Cited by 44 publications

(11 citation statements)

References 57 publications

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“…As discussed above, the EVDR firstly rises as the damage is developed from the undamaged to yielding stage, and then decreases as the damage exceeds yielding, as shown in Figure 12c. The EVDR is increased by 12.9, 13.4, 17.0, 69.8, and 56.2% as the replacement percentage of RCA increases and incorporating RFA and RBA at the undamaged stage, which agrees well with the previous studies on damping of RAC materials, 7,9 and structures 12 . The EVDR peaks as the beams yielded, and is increased by 2.6–3.1 times at the yielding stage for all the beams compared to that at the undamaged stage, agrees with the recent study by Liang et al 24 …”

Section: Resultssupporting

confidence: 91%

“…Equations () and () show that the energy dissipation and the EVDR are not directly related to the loading frequency, which agrees with the experimental results reported in Figure 6. The slight decline of the EVDR can be reflected by the variation in ω n which is proportional to the root of the stiffness and is slightly increased with the increasing loading frequency 12 . Besides, the trend of the increasing EVDR with the increasing loading (deflection) amplitude can also be reflected by the variation in λ , where a λ larger than 1/2 leads to an increasing EVDR.…”

Section: Modified Coulomb Damping Modelmentioning

confidence: 99%

“…The modal parameters of four 2‐story RAC frames were identified 11 but no conclusion of damping was drawn due to the scatter identification results caused by the failure to control the load amplitude. A structural health monitoring study on a 12‐story RAC structure was conducted 12 and a referenced NAC structure with similar material properties and structural design. The monitoring result showed an approximately 20% higher damping ratio of the RAC structure compared to the NAC structure, and demonstrated the obvious amplitude‐dependent characteristics of the damping ratio.…”

Section: Introductionmentioning

confidence: 99%

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Study on nonlinear damping behavior of damaged recycled aggregate concrete beams

Wang

Liang

2021

Structural Concrete

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An experimental study on the nonlinear damping behavior of recycled aggregate concrete (RAC) beams is conducted through subjecting dynamic loadings at the different damage stages. The effects of the loading frequency, loading amplitude, damage, recycled aggregate, and replacement percentage on the energy dissipation by damping and the equivalent viscous damping ratio (EVDR) of the RAC beams are analyzed. The experimental results show that the energy dissipation and the EVDR are not directly influenced by the loading frequency, and the EVDR rises with the increasing loading amplitude for the damaged beams. The damage stage is of great significance to the damping mechanism. The EVDR is firstly increased, peaks at the yielding stage, and finally declines with the damage accumulation, and the EVDR at the yielding stage can be increased to 2.6–3.1 times compared to the undamaged RAC beams. The EVDRs are higher for the beams with the incorporation of the recycled aggregates, because of their lower stiffness and higher energy dissipation. The experimental results demonstrate that the commonly applied viscous damping model is not capable of correctly describing the damping behavior of RAC beams, whereas the modified Coulomb damping model performs much better. A shift in the damping mechanism is observed with the damage evolution, and the relationships between the damage indices and the damping parameters are established.

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Section: Resultssupporting

confidence: 91%

Section: Modified Coulomb Damping Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on nonlinear damping behavior of damaged recycled aggregate concrete beams

Wang

Liang

2021

Structural Concrete

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“…Xiao et al (2018) investigated the structural performance and carbon footprint of a high-rise building made by RAC. Recently, Wang et al (2020) investigated the dynamic behaviors of two full-scale 12-story commercial buildings, one constructed of RAC and the other from NAC concluding that RAC is a promising substitution of NAC.…”

Section: Introductionmentioning

confidence: 99%

A review of experimental results on structural performance of reinforced recycled aggregate concrete beams and columns

Deresa

Demartino

et al. 2020

Advances in Structural Engineering

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This article presents a comprehensive and critical review of the structural performances of reinforced recycled aggregate concrete beams and columns based on experimental results reported in the literature. Extensive data sets collected from the literature are categorized to investigate the effects on the local and global structural behavior. First, the flexural and shear response of reinforced recycled aggregate concrete beams is discussed. The structural performances are reviewed focusing on the main geometric and material variables such as the recycled concrete aggregate replacement ratio, the longitudinal reinforcement ratio, the transverse reinforcement ratio, and the shear span-to-depth ratio. Then, the behavior of reinforced recycled aggregate concrete columns under concentric and eccentric compressive loads and the seismic performance under low cyclic loading are discussed. The similarities and the differences between reinforced recycled aggregate concrete and reinforced natural aggregate concrete beams and columns are highlighted. The need for further research is pointed out at the end of the article. The results reported in this review clearly indicate that reinforced recycled aggregate concrete beams and columns with various recycled concrete aggregate replacement ratios have comparable or slightly lower structural performances to the reinforced natural aggregate concrete ones indicating the feasibility of recycled concrete aggregate for structural applications.

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“…e macroproperties was closely related to the microproperties of cementitious materials [36][37][38], and thus further microscopic test and analysis should be conducted to achieve a better understanding on the chloride migration mechanism in unsaturated concrete. In addition, considering the wide use of recycled concrete in construction engineering [39][40][41], the chloride penetration into recycled concrete under the coupling effects of internal moisture content and external RH should be investigated in further. .…”

Section: Chloride Migration In Concrete With the Coupling Of Watermentioning

confidence: 99%

Chloride Penetration into Concrete under the Coupling Effects of Internal and External Relative Humidity

Fang

Ming-min

2020

Advances in Civil Engineering

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Chloride penetration frequently happens in an unsaturated concrete; in this case, the chloride migration is under the coupling effects of internal moisture and external relative humidity (RH). Various chloride attack tests were designed in this paper to investigate the effects of internal moisture and external RH (50–100%) on the chloride penetration into an unsaturated concrete, and the chloride content was determined to quantify the chloride migration in concrete. The results highlighted that there was a good correlation between the chloride penetration into concrete and its internal RH. The chloride ion was difficult to penetrate into concrete when its internal RH was below 50%; however, the chloride penetration rate increased when the internal RH of concrete was above 75%, and the chloride migration increased with increasing RH and exposure duration. Water evaporation in concrete increased with decreasing external RH, and an obvious increase in the surface chloride content may be observed when external RH was 50%; however, when external RH was above 75%, the inner chloride content increased and surface chloride content decreased with increasing exposure duration. Simulating the chloride penetration under wet-dry cycling, the water migration resulted in an increase in the surface chloride content and a decrease in the inner chloride content, and the chloride crystal precipitated on the surface of concrete with a high w/c ratio.

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Structural health monitoring and performance analysis of a 12-story recycled aggregate concrete structure

Cited by 44 publications

References 57 publications

Study on nonlinear damping behavior of damaged recycled aggregate concrete beams

Study on nonlinear damping behavior of damaged recycled aggregate concrete beams

A review of experimental results on structural performance of reinforced recycled aggregate concrete beams and columns

Chloride Penetration into Concrete under the Coupling Effects of Internal and External Relative Humidity

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