Fractional‐order freezing‐and‐thawing damage model for hydraulic concrete subjected to variable temperature processes

Huang, Yaoying; Wang, Yu; Wang, Ronglu; Yong, Zhou; Ding, Qian

doi:10.1002/suco.201900391

Cited by 7 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By using the equivalent age method, the hydration process of concrete cement under various curing temperatures can be converted into the hydration process of cement under a fixed reference temperature (20°C), allowing for comparison of the reaction state of concrete cement hydration under various curing temperatures. Nowadays, the Arrhenius function (Huang et al 2021) is frequently used to calculate equivalent ages:…”

Section: Equivalent Age Theory and Activation Energy Of Concretementioning

confidence: 99%

Experimental Study on Macro-performance of Long-age Hydraulic Concrete Based on High Temperature Accelerated Curing

Li,

Huang,

Liao

2023

16th International Conference on Durability of Building Materials and Components

View full text Add to dashboard Cite

In view of time-consuming and expensive for the long-age mechanical property test of hydraulic concrete, the change rule for the mechanical properties of hydraulic concrete with long-age is still unclear. Based on the equivalent age theory, the high-temperature curing method was employed to accelerate test. First, the macro-mechanical properties tests of hydraulic concrete at different curing ages (90d, 180d, 1a, 2a, 3a) and different fly ash contents (0%, 15%, 35%) were designed and carried out. Then the change rule of mechanical properties of hydraulic concrete at long-age were analyzed. In addition, the macro test results of concrete core specimen of a gravity dam which has been operated more than 40 years were adopted to feedback the above test results. The research results showed that the fly ash content had a significant influence on the activation energy Ea of hydraulic concrete. To reach the same hydration degree of design long-age, the curing time increased with the increasing of fly ash content. Within the curing age of 3a, the compressive and splitting tensile strength of concrete increased with the increasing of curing age. The strength values of cement concrete and concrete with 15% fly ash content were close to each other, while the strength values of concrete with 35% fly ash content were smaller than the cement concrete and concrete with 15% fly ash content. The consistency and reliability of the rule that the concrete strength continues to increase with age was further verified by combining the macroscopic test results and the strength growth rate calculation results of a gravity dam concrete core specimen that had been in service for more than 40 years.

show abstract

Section: Equivalent Age Theory and Activation Energy Of Concretementioning

confidence: 99%

Experimental Study on Macro-performance of Long-age Hydraulic Concrete Based on High Temperature Accelerated Curing

Li,

Huang,

Liao

2023

16th International Conference on Durability of Building Materials and Components

View full text Add to dashboard Cite

show abstract

“…In addition, the freeze–thaw deterioration of concrete is characterized by testing the compressive strength of concrete specimens during freeze–thaw tests. Numerous studies have investigated specific concretes to determine their mechanical properties (e.g., mass‐loss rate, relative dynamic modulus of elasticity, compressive strength) 4–8 . However, few studies have investigated the thermal parameters of concrete under freeze–thaw conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies have investigated specific concretes to determine their mechanical properties (e.g., mass-loss rate, relative dynamic modulus of elasticity, compressive strength). [4][5][6][7][8] However, few studies have investigated the thermal parameters of concrete under freeze-thaw conditions.…”

Section: Introductionmentioning

confidence: 99%

Evolution of thermal parameters of wet‐screened dam concrete after different freeze–thaw deterioration

Huang

Ding

Wang

et al. 2021

Structural Concrete

Self Cite

View full text Add to dashboard Cite

Even with specialized equipment, it is difficult to measure the thermal parameters of dam concrete during freeze-thaw testing. In addition, numerical calculations usually assume that freeze-thaw cycling does not change the thermal parameters of the aggregate and mortar of dam concrete, which makes it difficult to accurately determine how these parameters evolve during freeze-thaw deterioration. To address this challenge, we propose herein a new method to determine the thermal parameters of wet-screened dam concrete during freeze-thaw deterioration. This method involves freeze-thaw testing, temperature perturbation, numerical calculation, and optimization inversion. First, 200 rapid freeze-thaw tests and 5 temperature perturbation tests of 5 concrete

show abstract

“…Several authors employed theories of plasticity to simulate concrete behavior, 1 although the inelastic behavior of concrete is dominated by microcracking. On the other hand, elastic‐damage models, 2,3 coupled plastic‐damage models, 4,5 freeze–thaw damage model, 6 and lattice model 7 have also been adopted to describe the fracture in concrete under various loading and environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Modeling damage behavior of concrete subjected to cyclic and multiaxial loading conditions

Gafoor

Dinkler

2021

Structural Concrete

View full text Add to dashboard Cite

Concrete exhibits a different deformation behavior in tension and compression when subjected to uniaxial and biaxial loads. It also reveals crack‐opening and crack‐closing effects under cyclic loads. This paper discusses a gradient‐enhanced continuum damage model to investigate the deformation and damage behavior of concrete subjected to cyclic and multiaxial loading conditions. An activating variable introduced in the model distinguishes the multiaxial stress states. A single damage criterion that relates the history variable to the equivalent strain limits the elastic domain. The evolution of internal variables confirms their thermodynamic consistency. The gradient enrichment of equivalent strains leads to proper localization of deformation. Comparison of numerical predictions with relevant experimental data and some previous models validates the capability of the model to describe softening/crack‐closure behavior under various loading. Application of the model to fracture problems demonstrates the ability of the model to describe damage initiation and propagation, and its localization.

show abstract

Fractional‐order freezing‐and‐thawing damage model for hydraulic concrete subjected to variable temperature processes

Cited by 7 publications

References 15 publications

Experimental Study on Macro-performance of Long-age Hydraulic Concrete Based on High Temperature Accelerated Curing

Experimental Study on Macro-performance of Long-age Hydraulic Concrete Based on High Temperature Accelerated Curing

Evolution of thermal parameters of wet‐screened dam concrete after different freeze–thaw deterioration

Modeling damage behavior of concrete subjected to cyclic and multiaxial loading conditions

Contact Info

Product

Resources

About