Effect of early age drying shrinkage on the seismic response of RC structures

Jaafari, Chaimaa

doi:10.1617/s11527-020-01552-2

Cited by 12 publications

(21 citation statements)

References 47 publications

(88 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shrinkage in concrete is influenced by several factors such as temperature, humidity, time, mix design, material characteristics, curing processes, and specimen geometry. Indeed, when dealing with larger structure sizes (skyscraper columns and long-span bridge beams amongst others), shrinkage becomes a predominant structural deformation parameter [ 9 , 10 ]. The observation and monitoring of this phenomenon was recently achieved with Fiber Bragg Grating (FBG) [ 11 ] and the cutting edge monitoring technology represented by distributed optical fiber sensors (DOFS) [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Concrete Shrinkage Influence on the Performance of Reinforced Concrete Structures

et al. 2021

View full text Add to dashboard Cite

The contribution of concrete to the tensile stiffness (tension stiffening) of a reinforced concrete (RC) member is a key governing factor for structural serviceability analyses. However, among the current tension stiffening models, few consider the effect brought forth by concrete shrinkage, and none studies take account of the effect for very long-term shrinkage. The present work intends to tackle this exact issue by testing multiple RC tensile elements (with different bar diameters and reinforcement ratios) after a five-year shrinking time period. The experimental deformative and tension stiffening responses were subjected to a mathematical process of shrinkage removal aimed at assessing its effect on the former. The results showed shrinkage distinctly lowered the cracking load of the RC members and caused an apparent tension stiffening reduction. Furthermore, both of these effects were exacerbated in the members with higher reinforcement ratios. The experimental and shrinkage-free behaviors of the RC elements were finally compared to the values predicted by the CEB-fib Model Code 2010 and the Euro Code 2. Interestingly, as a consequence of the long-term shrinkage, the codes expressed a smaller relative error when compared to the shrinkage-free curves versus the experimental ones.

show abstract

Section: Introductionmentioning

confidence: 99%

Long-Term Concrete Shrinkage Influence on the Performance of Reinforced Concrete Structures

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Jaafari et al investigated two types of RC portal frames: one was sealed and the other was exposed to drying conditions such as construction sites, and dynamic loading tests were conducted. They monitored the shrinking and cracking behavior of the frames and obtained pseudodynamic loading experimental results [20]. The stiffness change due to drying was confirmed, and the ultimate capacity of the frames was obtained in their experiments.…”

Section: Frames and Structuresmentioning

confidence: 91%

Impact of drying on concrete and concrete structures

Maruyama

2022

RILEM Tech Lett

View full text Add to dashboard Cite

This study reviews research showing changes in the performance of reinforced concrete structures and members caused by drying conditions, and aims to contribute to evaluating the structural safety in the long-term use of concrete. Additionally, to build a consensus on the changes in the physical properties of concrete materials after drying, the review focused on experiments intended to produce a uniform distribution of moisture-induced material property changes in the interior of the cross-section. There is generally no effect on the change in the maximum loading capacity of a structure when the design is based on the flexural performance of the components. However, in the case of structures dominated by members determined by the shear capacity of the components, the reduction of the maximum loading capacity can be a problem. The decrease in stiffness is largely due to the opening of shrinkage cracks and the reduction of the Young’s modulus of concrete after drying. The change in the compressive strength of concrete due to drying is governed by the specific strength change of hardened cement paste caused by the colloidal nature, but it is also affected by the shrinkage of the aggregate, which changes the damage in concrete under drying.

show abstract

“…The specimens were instrumented with OFDR DOFS positioned in their core (see in Figure 33) and for the study of the local and global behavior of the matrix, of the textile and of the textile/matrix interface. Jaafari et al [99] stated that early-age shrinkage, creep and thermal conditions or initial cracking could have a significant impact on the dynamic behavior of RC structures. In order to quantify the impact of early-age drying shrinkage on the latter's dynamic behavior, the authors conducted an experimental campaign on two types of RC portal frames subjected to pseudo-dynamic testing.…”

Section: Miscellaneousmentioning

confidence: 99%

“…Jaafari et al [ 99 ] stated that early-age shrinkage, creep and thermal conditions or initial cracking could have a significant impact on the dynamic behavior of RC structures. In order to quantify the impact of early-age drying shrinkage on the latter’s dynamic behavior, the authors conducted an experimental campaign on two types of RC portal frames subjected to pseudo-dynamic testing.…”

Section: Laboratory Experimental Applicationsmentioning

confidence: 99%

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

Bado

Casas

2021

Sensors

215

View full text Add to dashboard Cite

The present work is a comprehensive collection of recently published research articles on Structural Health Monitoring (SHM) campaigns performed by means of Distributed Optical Fiber Sensors (DOFS). The latter are cutting-edge strain, temperature and vibration monitoring tools with a large potential pool, namely their minimal intrusiveness, accuracy, ease of deployment and more. Its most state-of-the-art feature, though, is the ability to perform measurements with very small spatial resolutions (as small as 0.63 mm). This review article intends to introduce, inform and advise the readers on various DOFS deployment methodologies for the assessment of the residual ability of a structure to continue serving its intended purpose. By collecting in a single place these recent efforts, advancements and findings, the authors intend to contribute to the goal of collective growth towards an efficient SHM. The current work is structured in a manner that allows for the single consultation of any specific DOFS application field, i.e., laboratory experimentation, the built environment (bridges, buildings, roads, etc.), geotechnical constructions, tunnels, pipelines and wind turbines. Beforehand, a brief section was constructed around the recent progress on the study of the strain transfer mechanisms occurring in the multi-layered sensing system inherent to any DOFS deployment (different kinds of fiber claddings, coatings and bonding adhesives). Finally, a section is also dedicated to ideas and concepts for those novel DOFS applications which may very well represent the future of SHM.

show abstract

Effect of early age drying shrinkage on the seismic response of RC structures

Cited by 12 publications

References 47 publications

Long-Term Concrete Shrinkage Influence on the Performance of Reinforced Concrete Structures

Long-Term Concrete Shrinkage Influence on the Performance of Reinforced Concrete Structures

Impact of drying on concrete and concrete structures

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

Contact Info

Product

Resources

About