Experimental research on seismic behavior of concrete-filled reactive powder concrete tubular columns

To explore the influence of axial compressive ratio on seismic behavior of reactive powder concrete(RPC) beam-column joints,this paper carry out RPC beam-column joints nonlinear finite element analysis,using software ABAQUS.The effect of different axial compression ratio on the ductility,energy dissipation capacity and bearing capacity are studied,based on hysteretic curves and skeleton curves of the components.The results show that,with the increase of axial compression ratio,skeleton curves of the components tend to be steep when the vertical load of beam ends exceed the peak point.The ultimate bearing capacity of the components are improved with the increasing of axial compression ratio which is less then 0.6,while the ultimate bearing capacity show a opposite trend when the axial compressive ratio exceed 0.6.

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Brief Analysis on Crack of Unbonded Partially Prestressed RPC Beam

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.238.181 ◽

2012 ◽

Vol 238 ◽

pp. 181-184 ◽

Cited By ~ 2

Author(s):

Qiang Fu ◽

Bing Feng Lv ◽

Xia Cao ◽

Ling Zhi Jin ◽

Ning Deng

Keyword(s):

Experimental Research ◽

Prestressed Concrete ◽

Concrete Structure ◽

Crack Width ◽

Reduction Factor ◽

Reactive Powder Concrete ◽

High Toughness ◽

High Durability ◽

Reactive Powder

Reactive Powder Concrete (RPC) has excellent properties such as high toughness and high durability. In this paper, based on the experimental research of the different unbonded prestressed tendons of the unbonded partially prestressed RPC beams, the crack calculation of prestressed RPC beams is analyzed. The results show that the crack regulation is special in some extent of the unbonded partially prestressed RPC beams. It is suggested that the crack width of unbonded partially prestressed RPC beams calculated in accordance with the specification for unbounded partially prestressed concrete structure should multiply the reduction factor of 0.7.

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Seismic Behavior of GFRP Tube Reactive Powder Concrete Composite Columns With Encased Steel

Frontiers in Materials ◽

10.3389/fmats.2021.793392 ◽

2021 ◽

Vol 8 ◽

Author(s):

Jing Ji ◽

Lingjie He ◽

Liangqin Jiang ◽

Hongguo Ren ◽

Shuai Ni ◽

...

Keyword(s):

Finite Element ◽

Energy Dissipation ◽

Seismic Behavior ◽

Reactive Powder Concrete ◽

Restoring Force ◽

Composite Columns ◽

Finite Element Software ◽

Energy Dissipation Capacity ◽

Fiber Winding ◽

Reactive Powder

To obtain the seismic behavior of glass fiber–reinforced polymer (GFRP) tube reactive powder concrete composite columns with encased steel (GRS), a total of 17 full-scale GRS columns were designed in this study. The parametric studies were conducted to explore the influence of factors such as the diameter of GFRP tube (D), thickness of GFRP tube (t), number of fiber winding layers (n), fiber winding angle (θ), axial compression ratio (λ), compressive strength of reactive powder concrete (fc), the area of encased steel (As), and strength of encased steel (fsy) on the seismic behavior of the composite columns. The finite element models of this kind of columns were established by ABAQUS finite element software, and the seismic behavior analysis for GRS composite columns was carried out. The results show that all the specimens exhibit good ductility and strong deformation ability. The stiffness degradation of specimens significantly slows down with the increase of D, fsy, and λ. The energy dissipation capacity of specimens can be improved by increasing D and λ, while the increase of As and fsy leads to the decrease of the energy dissipation capacity. By observing the failure mode of such composite columns, local bulging occurs in the foot area of the columns. Based on the statistical analysis of the calculated results, the restoring force models for GRS composite columns are proposed, which agree well with the simulated results. The restoring force models can provide reference for the elastic-plastic seismic response analysis of this kind of composite columns.

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Near-field blast test on reactive powder concrete-filled steel tubular columns after exposure to fire

International Journal of Protective Structures ◽

10.1177/2041419616637976 ◽

2016 ◽

Vol 7 (2) ◽

pp. 193-212 ◽

Cited By ~ 6

Author(s):

Wanxiang Chen ◽

Zhikun Guo ◽

Tao Zhang ◽

Huihui Zou ◽

Juan Gu

Keyword(s):

Near Field ◽

Reactive Powder Concrete ◽

Tubular Columns ◽

Reactive Powder

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Strength and Ductility of Reactive Powder Concrete Columns

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.417-418.621 ◽

2009 ◽

Vol 417-418 ◽

pp. 621-624 ◽

Cited By ~ 2

Author(s):

Guan Yuan Zhao ◽

Wen Xiu Hao

Keyword(s):

Analytical Model ◽

Seismic Behavior ◽

Concrete Columns ◽

Reactive Powder Concrete ◽

Test Results ◽

Acceptable Accuracy ◽

Reactive Powder ◽

Relationship Of ◽

Force Displacement ◽

Strength And Ductility

Two hollow rectangular bridge columns with Reactive powder concrete (RPC) were tested under a cyclically reversed horizontal load. Based on the test results, the seismic behavior of such columns was presented. An analytical model was developed to predict the force-displacement relationship of specimens. The test results were also compared to the proposed analytical model. It was found that the ductility factors of the specimens are over 4.0, and the proposed analytical model can predict the force-displacement relationship of such columns with acceptable accuracy.

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