Post-fire performance of high-strength steel plate girders developing post-buckling capacity

Hua, Jianmin; Xue, Xuanyi; Huang, Qinquan; Shi, Yu; Deng, Wenjie

doi:10.1016/j.jobe.2022.104442

Cited by 17 publications

(6 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 Failure load: The load when the concrete edge of the compression zone of the middle support section is crushed is the failure load. 3 Ultimate load: Because the bearing capacity of the test beam is still improved after the failure load is reached, the maximum load that the test beam can reach during the loading process is taken as the ultimate load.…”

Section: Specimen Failure Characteristicsmentioning

confidence: 99%

“…2 The calculated value of the side support reaction force. 3 The measured value of the side support reaction force.…”

Section: Analysis Of Plastic Internal Force Redistribution Performancementioning

confidence: 99%

“…In recent years, the requirements of architectural design have been continuously improved. High-strength steel with strength grades of Q460 and Q690 is widely used in large-span and high-rise building structures, such as the Bird's Nest, the Sony Center, and the Yokohama Landmark Tower [1], due to its high yield strength, good plasticity, and weldability [2][3][4]. To meet the needs of architectural design, high-performance composite structures have gradually attracted the attention of the engineering community [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Plastic Properties of Prestressed High-Strength Steel Reinforced Concrete Continuous Beams

Wang,

Yang

2024

Applied Sciences

View full text Add to dashboard Cite

In this paper, the plastic properties of prestressed high-strength steel reinforced concrete (PHSSRC) beams are studied, by performing static load tests on eight built-in Q460 and Q690 prestressed high-strength steel reinforced concrete continuous beams and one built-in Q355 prestressed steel reinforced concrete (PSRC) continuous beam. The design parameters of the specimens were the steel strength grade, the steel ratio, the comprehensive reinforcement ratio, and the stirrup ratio. The failure mode, load–deflection curve, internal force redistribution ability, curvature ductility, plastic hinge performance, and moment modification coefficient of continuous beams under the influence of various parameters were analyzed to measure the plastic performance of the continuous beams. These results show that after the plastic hinge is formed in the middle support and mid-span of the prestressed high-strength steel reinforced concrete continuous beam, the test beam eventually becomes a rotating mechanism and is destroyed with increasing load. The built-in high-strength steel can significantly improve the bearing capacity of the specimen, and the maximum increase in the bearing capacity is 37.3%. The specimen still has a high bearing capacity after reaching the ultimate bearing capacity. With a decrease in the steel ratio, the degree of internal force redistribution is deepened, the curvature ductility is improved, and the plastic performance is enhanced. Increasing the comprehensive reinforcement ratio and the stirrup ratio can improve the plastic performance of the specimen. The calculation formula of the equivalent plastic hinge zone length is proposed. The calculation formula of the moment modification coefficient, with the relative plastic rotation angle and relative compression zone height as independent variables, is established. When the relative plastic rotation angle is not greater than 0.829 × 10−5, the moment modification coefficient increases with increasing plastic rotation angle and is not greater than 0.37. In the range of 0.3~0.4, the moment modification coefficient decreases with increasing height of the relative compression zone.

show abstract

Section: Specimen Failure Characteristicsmentioning

confidence: 99%

“…2 The calculated value of the side support reaction force. 3 The measured value of the side support reaction force.…”

Section: Analysis Of Plastic Internal Force Redistribution Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plastic Properties of Prestressed High-Strength Steel Reinforced Concrete Continuous Beams

Wang,

Yang

2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The simplified constitutive model consisted of two characteristic points, which were the nominal yield point (ε y , f y ) and the ultimate point (ε u , f u ). The mathematical expression of the above simplified constitutive model was shown as Equation (3). Considering the investigation conducted in Section 3.2, the aforementioned characteristic points were influenced by the corrosion degree.…”

Section: Relationship Between Corrosion Degree and Characteristic Pointmentioning

confidence: 99%

“…With progress in the processing technology of steel, the structural steel with excellent mechanical properties, such as high strength, high toughness and good weldability, is produced [1,2]. For the high-strength steel (HSS), the yield and ultimate strength are better than those of mild steel [3]. For the elastic modulus, there is barely a difference between HSS and mild steel [4,5].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Property Model of Q620 High-Strength Steel with Corrosion Effects

et al. 2022

Self Cite

View full text Add to dashboard Cite

High-strength steel (HSS) is widely used in engineering structures, due to its superior material performance, but corrosion tends to occur in steel structures with time. The corrosion effects on mechanical performance of Q620 HSS were investigated experimentally. The electrochemical accelerated corrosion test was conducted to generate corroded Q620 HSS specimens (ρ = 0~60%). With increases in the corrosion degree, corrosion performance became more and more non-uniform. The tensile coupon test was conducted to clarify mechanical properties of corroded Q620 HSS specimens. With increases in corrosion degree, fy, fu, εu and E decreased, correspondingly. The effect of corrosion on εy could be ignored. With the deepening of corrosion, the necking of Q620 HSS specimens was weakened, which reduced their ductility. The simplified constitutive model consisting of nominal yield point (εy, fy) and ultimate point (εu, fu) was proposed to quantify the mechanical properties of Q620 HSS with different corrosion degrees. After the numerical fitting, relationships between the corrosion degree and mechanical properties were clarified. Based on the results of numerical fitting, mechanical properties of corroded Q620 HSS specimens were worse than those of specimens with idealized uniform corrosion. The adverse effect of corrosion on εuc was more obvious than that on strength properties. Comparison among different mild steels and HSSs was performed. Different indexes were chosen to clarify corrosion effects on the ductility of corroded Q620 HSS specimens. This study considers and discusses the research on corrosion rates, the relationships between service time, service environment, corrosion form and strength properties of Q620 HSS.

show abstract

Numerical Investigation and Design Suggestion on Patch-Loading Strength of Q690 High-Strength Steel Plate Girders at Elevated Temperature

Shi,

Luo,

Xue

et al. 2024

Fire Technol

View full text Add to dashboard Cite

Post-fire performance of high-strength steel plate girders developing post-buckling capacity

Cited by 17 publications

References 40 publications

Plastic Properties of Prestressed High-Strength Steel Reinforced Concrete Continuous Beams

Plastic Properties of Prestressed High-Strength Steel Reinforced Concrete Continuous Beams

Mechanical Property Model of Q620 High-Strength Steel with Corrosion Effects

Numerical Investigation and Design Suggestion on Patch-Loading Strength of Q690 High-Strength Steel Plate Girders at Elevated Temperature

Contact Info

Product

Resources

About