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static behavior of semi-rigid thin-walled steel-concrete composite beam-to-column joints with bolted partial-depth flush end plate:experimental study

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Journal of Harbin Institute of Technology(New Series) 2011年第5期18卷 91-102页

作者：郜京峰张耀春王海明姚淇誉金路 School of Civil Engineering Harbin Institute of Technology China Electronics Engineering Design Institute Beijing Institute of Architectural Design

A new type of semi-rigid thin-walled steel-concrete composite beam-to-column joint has been proposed in this *** semi-rigid composite beam-to-column joint specimens subjected to hogging moments under monotonic loading were tested to study the static behavior of this new type of *** main variable parameters for the five joint specimens were the longitudinal reinforcement ratio and the joint *** experimental results designated that the magnitude of extension of the longitudinal reinforcement is the most important factor that influenced the moment-rotation characteristic of the new type of *** concrete slabs could resist 3.8%-19.1% of the total shear load applied to the cross-sections near the beam-to-column *** edge stiffened elements,such as the flange of the lipped I-section thin-walled steel beam,were capable of having considerable inelastic deformation capacity although they had comparatively large width-to-thickness *** shear failure of the concrete cantilever edge strip must be taken into account in practical design because it has significant influence on the anchorage of the longitudinal reinforcement in the new type of external joints.

关键词： semi-rigid thin-walled steel-concrete composite structures beam-to-column joints static behavior experimental study

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Flexural Performance of Reinforced Concrete Beams Strengthened with Carbon Fiber-Reinforced Polymer(CFRP)under Hygrothermal Environment Considering the Influence of CFRP-Concrete Interface

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Acta Mechanica Solida Sinica 2021年第3期34卷 381-392页

作者： Xinyan Guo Peiyan Huang Yilin Wang Shenyunhao Shu Xiaohong Zheng School of Civil Engineering and Transportation South China University of TechnologyGuangzhou 510640China State Key Laboratory of Subtropical Building Science South China University of TechnologyGuangzhou 510640China

As an important component,the bond behavior of carbon fiber-reinforced polymer(CFRP)-concrete interface for a reinforced concrete(RC)beam is very *** this study,a theoretical model was established to analyze the flexural behavior of CFRP-strengthened RC beams,and the CFRP-concrete interfacial bond-slip relationship under hygrothermal environment was unified into one *** failure criteria corresponding to two types of failure modes,i.e.,concrete crushing and intermediate crack(IC)-induced debonding,were *** the theoretical model,the flexural behavior of deflection,interfacial shear stress distribution and ultimate load of a CFRP-strengthened RC beam under hygrothermal environment were obtained and ***,the theoretical model was verified by test *** results showed that the hygrothermal environment had a significant impact on the CFRP-concrete interface *** with the control beam without hygrothermal environment pretreatment,the deflection and ultimate load of the strengthened RC beam decreased by 51.9%and 20%,respectively.

关键词： Carbon fiber-reinforced polymer(CFRP) CFRP-concrete interface Hygrothermal environment Failure mode static behavior Reinforced concrete(RC)beam

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