Tests on the Steel–Concrete Bond Strength in Steel Reinforced Concrete (SRC) Columns After Fire Exposure

Han, Lin-Hai; Tan, Qing-Hua; Tao, Zhong

doi:10.1007/s10694-016-0610-6

Cited by 36 publications

(5 citation statements)

References 20 publications

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“…As a result, CFST columns have been extensively used as columns or other structural elements in residential buildings, industrial buildings, offshore structures, suspension bridges, and arch. Bridges (Wang et al, 2016; Xie et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Experimental study on axial compression properties of concrete filled steel tubular stub columns in varying ambient temperature

Wang,

Liu,

et al. 2024

Advances in Structural Engineering

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To better understand the mechanical property issues of in-service concrete-filled steel tube (CFST) bridges susceptible to natural environmental temperatures, 13 CFST stub columns were assessed under axial compression with different ambient temperatures and steel ratios, with the strength of the core concrete as the main parameters. The influence of ambient temperature on the peak strain and joint elastic modulus of the CFST stubs was investigated. The influence mechanism of steel content and core concrete strength on the residual toughness of the CFST at different ambient temperatures was revealed. In this study, we proposed a modified constitutive equation for CFST, taking into account the ambient temperature. We demonstrated that the peak strain, residual toughness ratio, and elastic modulus of the CFST stubs significantly decreased when the temperature decreased. The calculated values of the modified constitutive equation for CFST, taking into account the ambient temperature, were in good agreement with the test results and could be used to predict the trends in stress properties of the CFST stubs at different temperatures. The results could serve as a critical reference for the design and calculation of CFST structures in very cold regions.

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Section: Introductionmentioning

confidence: 99%

Experimental study on axial compression properties of concrete filled steel tubular stub columns in varying ambient temperature

Wang,

Liu,

et al. 2024

Advances in Structural Engineering

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“…The bond‐slip properties of 20 SSFRC specimens without rebar cages have been investigated by conducting push out tests. [ 25 ] The comparison results of interfacial bonding strength τ u between SSFRC and SRC completed by other scholars [ 26–36 ] are shown in Figure 3. The statistical results show that when C ss is similar, the τ u of SSFRC is slightly lower than SRC, but much higher than the reference value of bonding strength in European code.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on mechanical properties of steel and steel fiber reinforced concrete beams

Zhang

Lin³

et al. 2022

Structural Design Tall Build

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Summary According to the construction difficulties in steel reinforced concrete (SRC) structures, rebar cages were discretized into steel fibers to form steel and steel fiber reinforced concrete (SSFRC) structures. The 18 SSFRC beams without rebar cages were tested under bending, and the effect of the steel fiber volume ratio (ρsf), shaped steel ratio (ρss), and shear span ratio (λ) on mechanical properties were investigated. Increasing ρsf could not only turn shearing failure and debonding failure into bending failure, and effectively reduce the sudden decrease of load, but also enhance the bearing capacity, ductility, and damage resistance of specimens to a certain extent. As the ρss ascended, the mechanical properties were obviously improved. However, ρsf should be accordingly increased to avoid adverse effects of excessive ρss. The specimen with small λ had the better bearing and energy dissipation capacity and poor ductility. A large λ meant that ρss and ρsf should be appropriately increased to prevent premature failure of specimens.

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“…Zheng et al (2016) obtained local bond strength through the mechanical derivation. The paper of Wang et al (2017) presented the results of bond strength in SRC columns after fire exposure, and the outcome showed that the reduction in bond strength was as high as 54.2% due to fire exposure. The experimental test carried out by Liu et al (2018) established calculation formula of bond strength for steel reinforced recycled concrete.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on local bond-slip constitutive model between steel and steel fiber reinforced concrete structure of circular cross-section

Zheng

Zhou

et al. 2022

Advances in Structural Engineering

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The interface slip between shape steel and concrete is one of the biggest problems in numerical simulation of composite structures, this paper aims to investigate interfacial bond-slip behavior between steel and steel fiber reinforced concrete. For this purpose, a series of push-out tests on 15 circular section specimens which were designed and fabricated with different steel fiber ratio, interface embedded length and concrete cover thickness have been done. Experimental results show that average bond strength versus free end slip curves of each specimen is similar, and then a basic average bond strength-free end slip constitutive model was proposed in this paper. Meanwhile, considering the distribution regularities of steel strains, local bond strength and relative slip along the interface embedded length at different load levels were obtained through the mechanical derivation, the results show that the maximum local bond strength was located near the free end, and the local bond strength away from free end tended to be steady. Based on the basic average bond strength-free end slip constitutive model, two position functions were proposed to describe the local bond-slip constitutive model considering the variation of positions. Two position functions are of great significance for further research on SSFRC non-linear properties by FEM.

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Tests on the Steel–Concrete Bond Strength in Steel Reinforced Concrete (SRC) Columns After Fire Exposure

Cited by 36 publications

References 20 publications

Experimental study on axial compression properties of concrete filled steel tubular stub columns in varying ambient temperature

Experimental study on axial compression properties of concrete filled steel tubular stub columns in varying ambient temperature

Experimental study on mechanical properties of steel and steel fiber reinforced concrete beams

Experimental study on local bond-slip constitutive model between steel and steel fiber reinforced concrete structure of circular cross-section

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