Direct Tensile Behavior of Normal-Strength Concrete at Elevated Temperatures

Lam, Eddie Siu-Shu; Fang, Shuai

doi:10.14359/51686915

Cited by 6 publications

(13 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They concluded that the most reliable method of applying uniaxial tension (without inducing secondary stresses) is to glue the plates to the ends of the specimen. Table 1 shows that the influence of high temperatures on the uniaxial tensile strength of concrete was only examined by Felicetti and Gambarova (2000; and Lam and Fang (2014). Results reported by Lam et al (2014) are significantly lower than the other test results considered.…”

Section: Mechanical Properties Of Concrete At High Temperatures: Backgroundmentioning

confidence: 94%

“…Table 1 shows that the influence of high temperatures on the uniaxial tensile strength of concrete was only examined by Felicetti and Gambarova (2000; and Lam and Fang (2014). Results reported by Lam et al (2014) are significantly lower than the other test results considered. This may be due to the very slender shape of the specimens tested.…”

Section: Mechanical Properties Of Concrete At High Temperatures: Backgroundmentioning

confidence: 94%

“…Some of these studies are also referred to in the codes (Eurocode 2; Eurocode 4). In addition, more advanced techniques based on numerical and artificial intelligence (AI) approaches have been used in the recent years to further explore the material behaviour at elevated temperatures (Bingöl et al 2013;Lam and Fang 2014;Nechnech et al 2002;Neuenschwander et al 2016;Tanyildizi 2009). High-strength concrete (HSC) offers various benefits derived from its greater stiffness and strength (60-120 MPa), and its use has become increasingly popular.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Material Characterization Approach for Modeling High-Strength Concrete after Cooling from Elevated Temperatures

Arano

Colombo

Martinelli

et al. 2021

J. Mater. Civ. Eng.

View full text Add to dashboard Cite

Advanced numerical modelling of high-strength concrete ( c > 60 MPa) structures designed to withstand severe thermal conditions requires detailed and reliable information on the mechanical properties of the material exposed to elevated temperatures. The only uniaxial compressive strength variation with temperature is not enough to satisfy the big number of parameters often required by advanced non-linear constitutive models.For this reason, a complete experimental investigation is required. The paper takes a commonly used high strength concrete ( c = 73 MPa) as an example to describe a comprehensive experimental approach instrumental to the parameter definition and calibration of common constitutive models for concrete. The present study not only studied the overall compressive and tensile behaviour of the case study material, but also investigated the effect of elevated temperatures on the specific fracture energy and the evolution of internal damage, in residual conditions after a single thermal cycle at 200, 400 and 600 °C.

show abstract

Section: Mechanical Properties Of Concrete At High Temperatures: Backgroundmentioning

confidence: 94%

Section: Mechanical Properties Of Concrete At High Temperatures: Backgroundmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Material Characterization Approach for Modeling High-Strength Concrete after Cooling from Elevated Temperatures

Arano

Colombo

Martinelli

et al. 2021

J. Mater. Civ. Eng.

View full text Add to dashboard Cite

show abstract

“…The main task of this works is to investigate the residual behavior of steel concrete interface after high temperature exposure. To do this, what we do first is to exploit some experimental results given in the literature, [16,17] concerning the residual compressive strength of a concrete exposed to high temperature. From these results, the evolutive values of the different concrete parameters (particularly the Young's modulus) when the temperatures varied has been extracted and used to validate the numerical model.…”

Section: Introductionmentioning

confidence: 99%

“…From these results, the evolutive values of the different concrete parameters (particularly the Young's modulus) when the temperatures varied has been extracted and used to validate the numerical model. Secondly, the experimental and numerical results [17][18][19] of the stress-strain curves and the damage evolution were used to finalize our numerical program and simulate the pull-out tests.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Residual Behavior of Steel Concrete Interface after High Temperature Exposure

Zenasni

Haterbouch

Nasri

et al. 2021

cea

View full text Add to dashboard Cite

Behaviour of reinforced concrete and prestressed concrete structures subjected to fire is an important research theme in civil engineering. In addition, experiment investigations show that the concrete behavior is strongly affected by temperature. The aim of this work is to study numerically the residual behavior of steel-concrete bond after high temperature exposure. To do a numerical study, bond stress at the steel-concrete interface were developed using a concrete damage plasticity model (CDP model) implemented in the nonlinear finite element software «ABAQUS». The physical, mechanical and damage plasticity parameters (compressive damage and tensile damage) required for the model were drawn from previous literature works and the model was validated by simulating the uniaxial compression strength test under different temperatures using Abaqus code. The model was finally applied to simulate a pull-out test made on a reinforced concrete specimen heated at various temperature (105°C, 150°C, 200°C, 300°C, 400°C and 500°C.) and then cooled at room temperature. The numerical results show a good correlation with the experimental results and clearly indicate a deterioration of bond performance when temperature increased, particularly the bond stress, bond stiffness and pull-out force. The model was also used to validate the results of initiation and propagation of cracks.

show abstract

A length scale insensitive phase‐field model for fully coupled thermo‐mechanical fracture in concrete at high temperatures

Chen

Zhou

2022

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

Fracture in concrete at high temperatures involves complex thermo‐mechanical couplings and arbitrary crack evolution, imposing great challenges to its computational modeling. This work addresses a length scale insensitive phase‐field cohesive model for fully coupled thermo‐mechanical fracture in concrete at high temperatures. Both the thermal expansion and transient creep strain are accounted for in the kinematics. Based on the underlying phase‐field cohesive model for fracture in solids at ambient temperature, the temperature‐dependent mechanical properties of concrete, that is, Young's modulus, tensile and compressive strengths and fracture energy, and so forth, are all incorporated. In addition to the cracking‐induced mechanical damage mechanism represented by the crack phase‐field, the thermal deterioration mechanism is also considered by a temperature‐dependent thermal damage variable. The numerical implementation of the proposed model into the multi‐field finite element method is then briefly addressed. Several representative numerical examples, for example, thermally induced cracking in energy storage structures, thermal shock in quenched concrete plates, mode‐I and mixed‐mode failure of notched beams at high temperatures, and so forth, are presented for the validation. The effects of various expressions for the transient creep strain (TCS) on the global behavior of concrete structures are also studied. As in those purely mechanical problems, both the predicted crack pattern and global responses for all examples are insensitive to the incorporated phase‐field length scale. Being able to capture the fully coupled thermo‐mechanical fracture in concrete, the proposed phase‐field cohesive model, combined with a reliable hydro‐chemo‐thermal analysis, is promising in assessing the integrity and safety of concrete structures at high temperatures like fire scenarios.

show abstract

Direct Tensile Behavior of Normal-Strength Concrete at Elevated Temperatures

Cited by 6 publications

References 11 publications

Material Characterization Approach for Modeling High-Strength Concrete after Cooling from Elevated Temperatures

Material Characterization Approach for Modeling High-Strength Concrete after Cooling from Elevated Temperatures

Numerical Simulation of Residual Behavior of Steel Concrete Interface after High Temperature Exposure

A length scale insensitive phase‐field model for fully coupled thermo‐mechanical fracture in concrete at high temperatures

Contact Info

Product

Resources

About