Experimental investigation of seismic behavior of ultra-high performance steel fiber reinforced concrete columns

Xu, Shenchun; Wu, Chengqing; Liu, Zhongxian; Han, Kunpeng; Su, Yu; Zhao, Jian; Li, Jianchun

doi:10.1016/j.engstruct.2017.09.007

Cited by 69 publications

(26 citation statements)

References 21 publications

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“…The maximum drift ratio δ u was defined as the postpeak drift ratio corresponding to 0.85 P u. The displacement ductility ratio was calculated as μ = δ u / δ y .…”

Section: Resultsmentioning

confidence: 99%

Cyclic behavior of reinforced concrete columns confined with two layers of stirrups

Sun

2019

Structural Concrete

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Reinforced concrete (RC) columns confined with two layers of stirrups (TS) are a novel type of RC column, which consist of two layers of stirrups and longitudinal reinforcement. In this paper, the seismic behavior of TS-RC columns is investigated through a series of experiments, in which six one-half-scale column specimens were subjected to axial forces and lateral cyclic loading. For comparison, an additional six specimens are included in Li et al. The design and details of all specimens correspond to the same, except for the axial compressive load ratio. The test variables include the axial compressive load ratio applied to the columns, the cross-section type, and the spacing of transverse reinforcement. All specimens failed in a flexural mode, showing stable hysteresis loops. Because of the confinement of the two layers of stirrups, the TS-RC column specimens exhibit excellent ductility and dissipated energy even at the axial load ratio of 0.4. The lateral forcedrift relationships, backbone curves, energy dissipation, displacement ductility, stiffness degradation, final damage observed, and damage index are presented and discussed. K E Y W O R D Saxial load ratio, column, confinement, cyclic loading, ductility, seismic behavior, two layers of stirrups

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“…The maximum drift ratio δ u was defined as the postpeak drift ratio corresponding to 0.85 P u. The displacement ductility ratio was calculated as μ = δ u / δ y .…”

Section: Resultsmentioning

confidence: 99%

Cyclic behavior of reinforced concrete columns confined with two layers of stirrups

Sun

2019

Structural Concrete

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“…The lateral drift ratio δ was calculated by dividing the net lateral displacement at the location of lateral loading by the story height (H = 920 mm or 930 mm; δ = Δ/H). 30 During the loading test, displacement control was adopted. In the 0.2% story drift cycle process, cracks were found at the ends of the columns in BNF-0, and no cracks were found in BNF-1 and BHF-2.…”

Section: Crack Patterns and Observed Damagementioning

confidence: 99%

“…The yield strength P y was defined as the lateral load corresponding to the yield drift ratio δ y. [30][31] The displacement ductility ratio was calculated as μ = δ u /δ y . The test results of each specimen for the yield point, peak load, and the ultimate point corresponding to its bearing capacity, displacement, ductility ratio, and ultimate story drift are summarized in Table 5.…”

Section: Strength and Ductilitymentioning

confidence: 99%

Experimental study and numerical analysis on seismic behavior of composite RCS frames

Wei

Xiong

et al. 2020

Structural Concrete

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An experimental study of the seismic performance of composite frames consisting of reinforced concrete (RC) columns and steel beams (S) is presented in this paper. Three frame specimens-one bare composite RCS frame without slab and two composite RCS frames with slab-were tested under cyclic loading. The test results indicate that two frame specimens with small-scale steel beams exhibited better ductile behavior and dissipated energy, and the strength and stiffness degradation of the postelastic stage was not obvious. The results indicate that using a slab in the frame is not a good way to improve structural bearing capacity when the linear stiffness of steel beams is large. A plastic limit analysis method is proposed to calculate the lateral ultimate bearing capacity of an RCS frame under seismic action. The calculated results agree well with the test. Three RCS frame specimens were simulated using ABAQUS finite element analysis software. A comparison of the results of the numerical study with the experimental results demonstrates that the finite element model can accurately predict the structural behavior.

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“…The addition of fibers in concrete can also improve the seismic performance of concrete structures. For example, Xu et al [ 17 ] investigated the seismic performance of concrete columns with the addition of steel fibers. The results show that the existence of steel fiber could prevent the cracked concrete from spalling and delay the bulking of longitudinal reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Study of Mechanical Properties of an Eco-Friendly Concrete Containing Recycled Carbon Fiber Reinforced Polymer and Recycled Aggregate

Chen

Lan

et al. 2020

Materials

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This study investigates the feasibility of collaborative use of recycled carbon fiber reinforced polymer (RCFRP) fibers and recycled aggregate (RA) in concrete, which is called RCFRP fiber reinforced RA concrete (RFRAC). The mechanical properties of the composite were studied through experimental investigation, considering different RCFRP fiber contents (0%, 0.5%, 1.0%, and 1.5% by volume) and different RA replacement rates (0%, 10%, 20%, and 30% by volume). Specifically, ten different mixes were designed to explore the flowability and compressive and flexural strengths of the proposed composite. Experimental results indicated that the addition of RCFRP fibers and RA had a relatively small influence on the compressive strength of concrete (less than 5%). Moreover, the addition of RA slightly decreased the flexural strength of concrete, while the addition of RCFRP fibers could significantly improve the flexural performance. For example, the flexural strength of RA concrete with 1.5% RCFRP fiber addition increased by 32.7%. Considering the good flexural properties of the composite and its potential in reducing waste CFRP and construction solid waste, the proposed RFRAC is promising for use in civil concrete structures with high flexural performance requirements.

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Experimental investigation of seismic behavior of ultra-high performance steel fiber reinforced concrete columns

Cited by 69 publications

References 21 publications

Cyclic behavior of reinforced concrete columns confined with two layers of stirrups

Cyclic behavior of reinforced concrete columns confined with two layers of stirrups

Experimental study and numerical analysis on seismic behavior of composite RCS frames

Study of Mechanical Properties of an Eco-Friendly Concrete Containing Recycled Carbon Fiber Reinforced Polymer and Recycled Aggregate

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