Reforço de pilares curtos de concreto armado por encamisamento com concreto de ultra-alto desempenho

Enami, Rodrigo Mazia

doi:10.11606/t.18.2017.tde-05122017-104206

Cited by 1 publication

(12 citation statements)

References 13 publications

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“…Another factor contributing to the validation was the formation of cracks demonstrating the element's failure mode. In both cases, the degradation pattern was similar to the specimens tested experimentally for Ali Dadvar et al 25 (Figure 10) and Enami 23 (Figures 11 and 12).…”

Section: Results Of the Fem Calibrationsupporting

confidence: 75%

“…The UHPFRC gains interest in research covering column strengthening due to the properties mentioned, providing superior resistance capacity for the original structure without a significant increase in the thickness of the system 23 . As a result, a series of investigations were conducted on the performance of column strengthened using the UHPFRC 23–26 …”

Section: Introductionmentioning

confidence: 99%

“…22 The UHPFRC gains interest in research covering column strengthening due to the properties mentioned, providing superior resistance capacity for the original structure without a significant increase in the thickness of the system. 23 As a result, a series of investigations were conducted on the performance of column strengthened using the UHPFRC. [23][24][25][26] Enami 23 investigated the influence of the confinement by ultra-high-performance concrete (UHPC) and UHPFRC in short reinforced concrete columns with circular and square sections through experimental analysis and numerical simulations, also evaluating the addition of reinforcement and CFRP.…”

mentioning

confidence: 99%

“…23 As a result, a series of investigations were conducted on the performance of column strengthened using the UHPFRC. [23][24][25][26] Enami 23 investigated the influence of the confinement by ultra-high-performance concrete (UHPC) and UHPFRC in short reinforced concrete columns with circular and square sections through experimental analysis and numerical simulations, also evaluating the addition of reinforcement and CFRP. By analyzing 16 reinforced columns, the author concluded that small increments of the strengthening thickness provide high gains in the axial compressive strength.…”

mentioning

confidence: 99%

“…The validation was based on the experimental results of Enami. 23 Consequently, the models were extrapolated to investigate the influence of UHPFRC jacketing thickness, cross-sectional shape, and the concrete core compressive strength. Finally, based on this theory, an analytical model was developed to predict the stress-strain behavior in compression.…”

mentioning

confidence: 99%

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Effect of ultra‐high performance concrete repair layer thickness on the behavior of concrete columns

Tolentino,

dos Santos,

Poncetti

et al. 2023

Structural Concrete

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The use of ultra‐high‐performance fiber reinforced concrete (UHPFRC) to repair or rehabilitate old concrete structures has been shown to be appropriate due to its properties, such as higher compressive strength, ductility, and durability than conventional concretes. One of the studied strengthening techniques is the reinforced concrete columns jacketing by UHPFRC. Some recent research evaluated some parameters, such as the repair thickness and the volumetric ratio of stirrups. However, other important parameters, such as UHPFRC jacketing thickness in different column cross‐sections and the concrete core compressive strength, need to be addressed. In addition, the analytical models presented in the literature are restricted to only one concrete grade. The present study aims to evaluate the behavior of short reinforced concrete columns strengthened with UHPFRC subjected to centered compression. Numerical analyses of three‐dimensional models were performed using the finite element method, validated, and calibrated using experimental results. The influence of the concrete core compressive strength, the UHPFRC jacketing thickness, and the shape of the cross‐section were evaluated. Numerical simulations concluded that the lower concrete core compressive strength columns showed the best relative increase performance. Moreover, the concrete core strength was inversely proportional to the resistance capacity of the repair system. In addition, the increase in repair thickness contributes to the axial strength of the column. Furthermore, the cross‐section influences the distribution of stresses and strains, showing the best performance for circular sections. Finally, regardless of cross‐section type, the proposed equations accurately predicted the numerical results.

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Section: Results Of the Fem Calibrationsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%