A Micro-Cracking Model Coupled With Micro Fracture and Water Status in Micro Pore Structures

Yoneda, Taiju; Ishida, Tetsuya; Maekawa, Koichi; Gebreyouhannes, Esayas; Mishima, Taketoshi

doi:10.2208/jscejmcs.71.263

Cited by 8 publications

(15 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is called as Pickett effect (Pickett 1942;Bazant 2001). This nonlinearity is consistently simulated in considering moisture transport and the constitutive model for cement paste of meso-scale (Asamoto et al 2006) before and after cracking (Maekawa et al 2008;Yoneda et al 2014Yoneda et al , 2015. The coupling of sustained stresses and drying was also found to cause an excessive deflection of long-span PC box sectional viadcuts of about 10 years after construction (Bazant et al 2010;Ohno et al 2012).…”

Section: Coupled Differential Shrinkage-swelling and Sustained Loadsmentioning

confidence: 92%

See 1 more Smart Citation

Mechanism of Long-Term Excessive Deformation and Delayed Shear Failure of Underground RC Box Culverts

Maekawa

Zhu

Chijiwa

et al. 2016

ACT

Self Cite

View full text Add to dashboard Cite

The aim of this study is to clarify the mechanism of the progressive excessive deformation observed in real underground RC box culverts of about 30 years of age. It was found by the site-inspection, monitoring and the destructive testing that the excessive deflection of top slabs for the culverts, which is almost 10 times the design estimated value, accompanies the out-of-plane shear failure. It is also computationally investigated that the coupling of subsidence of the backfill soil and the combined creep and shrinkage of concrete after cracking is closely associated with the delayed shear failure found in the culvert in service. In order to prove the delayed shear failure under higher sustained loads, the timedependent shear crack propagation was reproduced in the laboratory test and the computational approach used in this study was examined.

show abstract

Section: Coupled Differential Shrinkage-swelling and Sustained Loadsmentioning

confidence: 92%

“…Fig. 3 Scheme of multi-scale modeling of structural concrete (Yoneda et al 2013(Yoneda et al , 2015. …”

Section: Multi-scale Soil-rc Interaction Analysismentioning

confidence: 99%

Mechanism of Long-Term Excessive Deformation and Delayed Shear Failure of Underground RC Box Culverts

Maekawa

Zhu

Chijiwa

et al. 2016

ACT

Self Cite

View full text Add to dashboard Cite

show abstract

“…For experimental verification of the thermo-hygral analysis associated with creep and shrinkage Yoneda et al 2015), absolute strains are reported in this study without any compensation of the thermal volumetric expansion and contraction. As the temperature of all specimens developed over the seasons almost uniformly, the measured differential strain is not influenced practically by the temperature changes, but it reflects the different evolution of creep and shrinkage of concrete.…”

Section: Transient Differential and Mean Strains Of Pc Segmentsmentioning

confidence: 99%

“…Under the lapped curing, moisture loss through the surfaces is not computationally allowed. At the onset of exposure to out-door climate, the moisture transfer elements are placed on the surface and the moisture exchange between concrete and environments is made possible (Yoneda et al 2015(Yoneda et al , 2013.…”

Section: Transient Differential and Mean Strains Of Pc Segmentsmentioning

confidence: 99%

“…The continued deflection for a long time is clarified mainly due to the differential shrinkage of viaduct's flanges of different dimensions . Currently, the long-term excessive deflection can be estimated by thermo-hygral analysis (Ishida et al 2007;Maekawa et al 2008;Yoneda et al 2015Yoneda et al , 2013 which simulates the moisture migration and equilibrium coupled with mechanical models as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Long-Term Differential and Averaged Deformation of Box-Type Pre-stressed Concrete Exposed to Natural Environment

Chijiwa

Hayasaka

Maekawa

2018

ACT

Self Cite

View full text Add to dashboard Cite

Middle-scale box-sectional hollow PC ducts, which consist of heterogeneous concrete with different mix proportions, were exposed to natural environments for about three years, and the long-term curvature and axial mean deformation, which have much to do with deflection of long span bridge viaducts, was gaged for verification of coupled thermo-hygral and multi-scale models. The associated internal moisture and the local climate inside micro-pores were measured and the effect of precipitation was quantified over yearly four seasons. The moisture migration linked with concrete multi-scale mechanics was analyzed and the simulation results are compared with the field exposure tests. The reliability of the thermo-hygral analysis, which has been used for estimating the long-term serviceability of bridges, was made firmer.

show abstract

混合セメントおよび水掛かりの影響を考慮したコンクリートの収縮ひずみ予測式の提案

Watanabe¹,

NAKAMURA²,

Ishida³

et al. 2022

JJSCE E2

View full text Add to dashboard Cite

A Micro-Cracking Model Coupled With Micro Fracture and Water Status in Micro Pore Structures

Cited by 8 publications

References 24 publications

Mechanism of Long-Term Excessive Deformation and Delayed Shear Failure of Underground RC Box Culverts

Mechanism of Long-Term Excessive Deformation and Delayed Shear Failure of Underground RC Box Culverts

Long-Term Differential and Averaged Deformation of Box-Type Pre-stressed Concrete Exposed to Natural Environment

混合セメントおよび水掛かりの影響を考慮したコンクリートの収縮ひずみ予測式の提案

Contact Info

Product

Resources

About