Ductalr Seonyu footbridge

Behloul, M.; Lee, K. C.

doi:10.1680/stco.4.4.195.37636

Cited by 3 publications

(1 citation statement)

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“…For instance, compressive strength of RPC is 100-800 MPa and elasticity modulus is 40 GPa-60 GPa [2][3][4]. Application of RPC has increased recently [5,6]. However, the main disadvantages of RPC are mainly the lower ratio of ultimate strain to peak strain, which make it more brittle than normal strength concrete (NSC) or high-strength concrete (HSC).…”

Section: Introductionmentioning

confidence: 99%

Response of RPC-Filled Circular Steel Tube Columns under Monotonic and Cyclic Axial Loading

Rong

Zeng

Guo

et al. 2019

Shock and Vibration

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Results from mechanical tests on thirteen reactive powder concrete- (RPC-) filled circular steel tube (RFCT) columns under monotonic and cyclic axial loading are presented in this paper. The test variables include monotonic and cyclic loadings, confinement coefficient, and diameter of the steel tube. The test results show that the envelope curves of specimens under cyclic loading were similar to the load-deformation curves of the specimens under monotonic loading. Confinement coefficient had a significant influence on the failure modes of RFCT columns. With an increase in confinement coefficient of 0.53 to 0.98, the failure mode transformed from shear failure to compressive failure for specimens under monotonic and cyclic loading. In the elastic stage, no confining effect was provided by the steel tube to the RPC since Poisson’s ratio of steel was larger than the transverse deformation coefficient of RPC. Beyond the elastic stage, the axial compressive strength and ultimate strain of RPC increased significantly due to the confining effect when compared to unconfined RPC. Stress of the steel tube and RPC was investigated by using an elastic-plastic analytical model. Before yielding of the steel tube, stress development in the tube was faster in the longitudinal direction than in the hoop direction. The results of the experiment indicate that the compressive strength of RPC could be predicted by Mander’s model for confined concrete. Based on Mander’s model, an equation is extended to calculate the axial compressive strength of RFCT columns, and the predicted results are in good agreement with the test results. Based on comparative analysis of 180 RFCT columns axial compressive tests, the equation given by EC4 considering the confinement effect can be applied to predict the compressive strength of RFCT columns.

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Section: Introductionmentioning

confidence: 99%

Response of RPC-Filled Circular Steel Tube Columns under Monotonic and Cyclic Axial Loading

Rong

Zeng

Guo

et al. 2019

Shock and Vibration

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Ultrahochfester Beton UHPC

Fehling

Schmidt

Walraven

et al. 2012

Beton‐Kalender 2013

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A Study on Optimum Mixture Ratio of Reactive Powder Concrete

Chen

Zheng

2018

Advances in Materials Science and Engineering

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To optimize the main components of reactive powder concrete (RPC) for various curing methods, based on the fluidity and compressive strength, an inclusive experimental research is conducted on 58 different mixture ratios. e results indicate that owing to the increase of the cement strength, the RPC fluidity decreases and the cement strength is not proportional to the compressive strength. e addition of the fly ash and the nano-microbead is an effective way to improve the fluidity, and it is required at the low W/B ratio. However, the influence of the SF grade on the strength and fluidity is almost negligible. By considering the fluidity, strength, and economy of RPC as crucial design factors, SF90 is suggested. e contribution of the steel fiber to the compressive strength cannot be ignored. e upper envelope value of the steel fibers is required for the structure to resist appropriately against the fire. According to the test results, the mixture ratio formula is proposed through considering the characters of different compositions and curing methods. e strength coefficient k 1 is introduced to verify the influence of the steel fiber content, and the parameters f b , α a , and α b in the formula are reevaluated. A reasonably good agreement between the calculated strength and those obtained from the tests is reported, except for the case of W/B � 0.16 with P.O.52.5 cement. e basic steps for preparations of different RPC strengths are given, which provide a valuable reference to choose appropriate raw materials and mixture ratio design for different strength values.

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Ductalr Seonyu footbridge

Cited by 3 publications

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Response of RPC-Filled Circular Steel Tube Columns under Monotonic and Cyclic Axial Loading

Response of RPC-Filled Circular Steel Tube Columns under Monotonic and Cyclic Axial Loading

Ultrahochfester Beton UHPC

A Study on Optimum Mixture Ratio of Reactive Powder Concrete

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