Cyclic behavior of UHPFRC flexural members reinforced with high-strength steel rebar

Hung, Chung-Chan; Chueh, Chen Yu

doi:10.1016/j.engstruct.2016.05.008

Cited by 80 publications

(19 citation statements)

References 21 publications

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“…All tested beams showed a stiff load–deflection behavior and satisfied the service crack width criteria of CAN/CSA S806. Hung and Chueh experimentally studied cyclic behavior of UHPFRC cantilever beams reinforced with high‐strength steel rebars under seismic action and found that the tested beams showed satisfactory cyclic flexural performance prior to failure and the addition of steel fibers enhanced the damage tolerance ability of the test beams. It can be concluded that the reported researches mostly focused on the influence of fibers on the structural behavior of ultra‐high‐performance concrete (UHPC) beams and researches on the flexural behavior of HSS‐UHPFRC beams are scarce in the literature to date.…”

Section: Introductionmentioning

confidence: 99%

Flexural response of high‐strength steel‐ultra‐high‐performance fiber reinforced concrete beams based on a mesoscale constitutive model: Experiment and theory

Wang

John

2017

Structural Concrete

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This paper presents the results of experimental and theoretical studies undertaken to assess the flexural performance of high-strength steel-ultra-high-performance fiber reinforced concrete (HSS-UHPFRC) beams. A total of nine HSS-UHPFRC beams were tested, and the influence of fiber volume fraction, fiber type, longitudinal reinforcement ratio, and concrete strength on the flexural response was evaluated. The results indicate that sufficient longitudinal reinforcement should be provided in a UHPFRC beam to avoid abrupt failure and possible catastrophic collapse. After the loss of the fiber bridging effect, corresponding to the fibers being pulled out from the matrix, which occurs one by one with audible sound which is sizzling, redistribution, and homogenization of the concrete stress beside cracks, induced by the dispersed fibers, takes place and more flexural cracks with small spacing appear besides the existing cracks. The beam stiffness was about 85% of the initial beam stiffness at flexural cracking state and was only approximately 25% of the initial beam stiffness at the ultimate state. A constitutive model is proposed, including a bilinear model for compression and a drop-down model for tension, taking into account uniform distribution, embedment length, and orientation of fibers for the multi-scale mechanics analysis. A flexural strength model was subsequently derived on the basis of the proposed mesoscale constitutive model; strain compatibility and force equilibrium were taken into account. The prediction of the ultimate flexural capacity and the overall post-cracking response with the proposed model show a good agreement with the test results. K E Y W O R D Sconstitutive model, depth of compression zone, fiber orientation, flexural strength, high-strength steel (HSS), steel fiber, ultra-high-performance concrete (UHPC), ultra-high-performance fiber reinforced concrete (UHPFRC)

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Section: Introductionmentioning

confidence: 99%

Flexural response of high‐strength steel‐ultra‐high‐performance fiber reinforced concrete beams based on a mesoscale constitutive model: Experiment and theory

Wang

John

2017

Structural Concrete

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“…As noted in several studies [5,6], the reinforcement of concrete with fibers leads to a significant increase in the compression strength of concrete (120-170 MPa), which is 3-4 times higher than the indicators for heavy concretes B30-B50 that are common in the Ukrainian shipbuilding. In addition, an increase in strength leads to an increase in the concrete modulus of elasticity, which improves its per-formance in a combination with steel reinforcement [7,8]. In order to improve qualitative characteristics of a concrete mixture and to influence the processes of setting and hardening, as admixture is needed.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Improvement of the structure of floating docks based on the study into the stresseddeformed state of pontoon

Shchedrolosiev

Korostylov

Klymenkov

et al. 2018

EEJET

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“…On the other hand, in the compressive zone of the UHPC flexural members, the confinement effect provided by the fibers will enhance the compressive ductility and residual strength of UHPC, and therefore restrain the concrete spalling and crushing. Moreover, due to the integrity of the concrete matrix around the reinforcing rebars, the bond-slip toughness and energy dissipation capacity of the UHPC flexural members can be increased (Hung and Chueh, 2016).…”

Section: Introductionmentioning

confidence: 99%

A review on seismic behavior of ultra-high performance concrete members

Fang

Shi

et al. 2020

Advances in Structural Engineering

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Ultra-high performance concrete (UHPC) is a type of cementitious composite, and demonstrates very high compressive strength and good ductility. The favorable ductility and energy dissipation capacity of UHPC material make it possible to achieve excellent seismic performance in all kinds of structural members. The paper reviewed the recent progress on the seismic behavior of UHPC members, including flexural members (beams and plates), compressive members (columns and shear walls), joints (beam-column joints and plate-column joints), strengthening (strengthening for columns, shear walls and joints) and connections (bar lap splice and grout). A series of potential future researches on the seismic behavior of UHPC members were finally suggested for promotion of the application of UHPC in civil engineering.

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Cyclic behavior of UHPFRC flexural members reinforced with high-strength steel rebar

Cited by 80 publications

References 21 publications

Flexural response of high‐strength steel‐ultra‐high‐performance fiber reinforced concrete beams based on a mesoscale constitutive model: Experiment and theory

Flexural response of high‐strength steel‐ultra‐high‐performance fiber reinforced concrete beams based on a mesoscale constitutive model: Experiment and theory

Improvement of the structure of floating docks based on the study into the stresseddeformed state of pontoon

A review on seismic behavior of ultra-high performance concrete members

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Cyclic behavior of UHPFRC flexural members reinforced with high-strength steel rebar

Cited by 80 publications

References 21 publications

Flexural response of high‐strength steel‐ultra‐high‐performance fiber reinforced concrete beams based on a mesoscale constitutive model: Experiment and theory

Flexural response of high‐strength steel‐ultra‐high‐performance fiber reinforced concrete beams based on a mesoscale constitutive model: Experiment and theory

Improvement of the structure of floating docks based on the study into the stressed­deformed state of pontoon

A review on seismic behavior of ultra-high performance concrete members

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Improvement of the structure of floating docks based on the study into the stresseddeformed state of pontoon