Meso-scale response of concrete under high temperature based on coupled thermo-mechanical and pore-pressure interface modeling

Caggiano, António; Schicchi, Diego Said; Etse, Guillermo; Ripani, Marianela

doi:10.1016/j.engfailanal.2017.11.016

Cited by 29 publications

(10 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the literature reviewed in this study, several studies focused on the effect of moderate to high temperature on beam strength and tended toward revealing damage properties. [6][7][8][9][10][11][12][13][14] In the case of RC beams, unlike the extensive research performed to understand the performance of RC beams exposed to creep and shrinkage, a few studies have been and distribution of fire during analysis had an important role in the flexural strength of RC beams. Biondini and Nero 26 proposed a new model for the structural analysis of structures after a fire.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature reviewed in this study, several studies focused on the effect of moderate to high temperature on beam strength and tended toward revealing damage properties. 6–14 In the case of RC beams, unlike the extensive research performed to understand the performance of RC beams exposed to creep and shrinkage, a few studies have been carried out on the effect of moderate to high temperature on the short-term behavior of RC beams. 15–24…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous effect of temperature, shrinkage, and self-weight creep on RC beams: A case study

Aval

Ghabdian

Noori

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

This study presents the results of long-term field measurement of two RC beams under the simultaneous effect of medium to high temperature, shrinkage, and self-weight creep. In industrial complexes such as steel making plants, these members may, in addition to creep and shrinkage, be exposed to high temperature. However, less attention has been paid to the simultaneous effect of creep, shrinkage, and temperature in a case study framework. In this regard, two RC beams with the same geometric properties in a pelletizing plant located in Kerman, Iran, were studied. In addition, in order to establish a powerful numerical method for these effects, numerical results were compared with the field measurement data. The results showed that an average increase by 50% in temperature would increase the maximum deflection of RC beam by 37%. In the case of the environment temperature, grate machine temperature increased the maximum deflection of RC beam by 61%. Moreover, field measurements showed that for self-weight creep level, shrinkage, temperature, and cracking strains covered more than 80% of the total strain. Similarly, such as this case study, simultaneous effects of these triple factors can change the long-term serviceability of structural elements exposed to harsh environmental conditions.

show abstract

Section: Introductionmentioning

confidence: 99%

“…In the literature reviewed in this study, several studies focused on the effect of moderate to high temperature on beam strength and tended toward revealing damage properties. 6–14 In the case of RC beams, unlike the extensive research performed to understand the performance of RC beams exposed to creep and shrinkage, a few studies have been carried out on the effect of moderate to high temperature on the short-term behavior of RC beams. 15–24…”

Section: Introductionmentioning

confidence: 99%

Simultaneous effect of temperature, shrinkage, and self-weight creep on RC beams: A case study

Aval

Ghabdian

Noori

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…Motivated by the aim of optimal design of cementitious composites with superior fire-resistant performance, multiscale continuum mechanics-based models have been configured to quantitatively characterize the relation between the temperature and macro elastic properties (Caggiano et al., 2018; Liang et al., 2019; Zhang et al., 2020a). In Lee’s multi-scale model (Lee et al., 2009), the decomposition of the C–S–H gel and portlandite and the degradation of aggregates were considered based on the analysis of dehydration kinetics.…”

Section: Introductionmentioning

confidence: 99%

Insights into the effect of high temperature on the shear behavior of the calcium silicate hydrate by reactive molecular dynamics simulations

Zhang

Chen

et al. 2022

International Journal of Damage Mechanics

View full text Add to dashboard Cite

When subjected to fires, cementitious composites can be seriously damaged. However, the mechanical behavior of nanoscale calcium silicate hydrate (C–S–H) grains, which are the main binder of cementitious composites, exposed to elevated temperatures under shear deformations remain poorly investigated. In this paper, considering different calcium/silicate (C/S) molar ratios (i.e., C/S = 1.10, 1.33, and 1.64), the shear behavior of the C–S–H grain after exposure to different high-temperature levels (i.e., 300 K, 500 K, 700 K, 900 K, and 1000 K) is studied by conducting series of reactive molecular dynamics simulations. Results reveal that the C–S–H grain exhibits good plasticity under shear deformation. Furthermore, the shear modulus of the C–S–H grain is between 14 GPa and 17 GPa and exhibits a decrease with the calcium/silicon (C/S) molar ratio at ambient temperature. While the shear strength is around 1.0 GPa and reaches the lowest value at C/S = 1.64. Interestingly, we report that heating can lead to the increase of the shear modulus and shear strength due to the sevaporation of the interlayer water which generally acts as the lubricant. Additionally, we show that heating has no clear influence on the shear strain corresponding to the onset of yielding when the C/S ratio is high but can indeed improve the shear strain corresponding to the shear strength. Furthermore, the yielding area of the C–S–H grain under the shear deformation can be enlarged. Finally, factors affecting the strength degradation of cementitious composites after being heated to different temperature levels are further discussed based on the simulation results.

show abstract

“…The most classical examples in this field are those based on a further development of the well-known smeared crack procedure to deal with the thermo-mechanical behavior of concrete [15][16][17]. Advanced models dealing with meso-scale descriptions [18][19][20], multi-physics [21] and multiscale approaches [22] are also available in this matter. It should be mentioned that, so far, only a few of the mentioned models are capable to accurately describe the complex response of cementitious materials under high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Thermal Action on Normal and High Strength Cement Mortars

et al. 2020

Self Cite

View full text Add to dashboard Cite

High temperature effect on cement-based composites, such as concrete or mortars, represents one of the most important damaging process that may drastically affect the mechanical and durability characteristics of structures. In this paper, the results of an experimental campaign on cement mortars submitted to high temperatures are reported and discussed. Particularly, two mixtures (i.e., Normal (MNS) and High Strength Mortar (MHS)) having different water-to-binder ratios were designed and evaluated in order to investigate the incidence of both the mortar composition and the effects of thermal treatments on their physical and mechanical properties. Mortar specimens were thermally treated in an electrical furnace, being submitted to the action of temperatures ranging from 100 to 600 °C. After that and for each mortar quality and considered temperature, including the room temperature case of 20 °C, water absorption was measured by following a capillary water absorption test. Furthermore, uniaxial compression, splitting tensile and three-points bending tests were performed under residual conditions. A comparative analysis of the progressive damage caused by temperature on physical and mechanical properties of the considered mortars types is presented. On one hand, increasing temperatures produced increasing water absorption coefficients, evidencing the effect of thermal damages which may cause an increase in the mortars accessible porosity. However, under these circumstances, the internal porosity structure of lower w/b ratio mixtures results much more thermally-damaged than those of MNS. On the other hand, strengths suffered a progressive degradation due to temperature rises. While at low to medium temperatures, strength loss resulted similar for both mortar types, at higher temperature, MNS presented a relatively greater strength loss than that of MHS. The action of temperature also caused in all cases a decrease of Young’s Modulus and an increase in the strain corresponding to peak load. However, MHS showed a much more brittle behavior in comparison with that of MNS, for all temperature cases. Finally, the obtained results demonstrated that mortar quality cannot be neglected when the action of temperature is considered, being the final material performance dependent on the physical properties which, in turn, mainly depend on the mixture proportioning.

show abstract

Meso-scale response of concrete under high temperature based on coupled thermo-mechanical and pore-pressure interface modeling

Cited by 29 publications

References 33 publications

Simultaneous effect of temperature, shrinkage, and self-weight creep on RC beams: A case study

Simultaneous effect of temperature, shrinkage, and self-weight creep on RC beams: A case study

Insights into the effect of high temperature on the shear behavior of the calcium silicate hydrate by reactive molecular dynamics simulations

Thermal Action on Normal and High Strength Cement Mortars

Contact Info

Product

Resources

About