Experimental Study on Seismic Behavior of Full Encased Steel-Concrete Composite Columns

Chen, Caihua; Wang, Cuikun; Sun, Hui

doi:10.1061/(asce)st.1943-541x.0000951

Cited by 61 publications

(22 citation statements)

References 8 publications

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“…Steel‐reinforced concrete (SRC) columns have the advantages of steel columns and RC columns, such as high strength, stiffness, ductility and excellent performance of fire resistance and durability, which can reduce the space of columns in buildings effectively. Many studies have been conducted for concrete‐encased H‐shaped steel and cross‐shaped steel composite columns to investigate the load‐carrying capacity (Ye et al ., ; Wang ; Mirza and Lacroix, ; Kim et al ., ), behavior under uniaxial bending and axial compressive load, and its influence factors (El‐Tawil and Deierlein, ; Li and Matsui, ; Hsu et al ., ; Weng et al ., ; Chen et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Experimental study on seismic performance of mega steel-reinforced concrete columns subjected to cyclic loads

Jiang

Zhu³

2015

Struct. Design Tall Spec. Build.

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In recent years, mega steel-reinforced concrete (SRC) columns have been applied in super tall buildings. The previous research on SRC columns mainly focuses on the components with simple arrangement of shaped steel, such as H-shaped steel and cross-shaped steel, with little attention paid to mega SRC columns, which always have complicated encased steel and large steel ratio. The cyclic loading tests were carried out on scaled mega SRC column models with different cross-section type of encased steel and steel ratio. The principal damage states were investigated throughout the entire testing process. Based on the test results, the effects of steel ratio and the cross-section type of encased steel on the damage characteristics, hysteretic behavior, ductility, secant stiffness degradation, energy dissipation capacity and maximum crack width were analyzed. The test results indicate that the steel ratio has significant effect on the seismic performance of mega SRC columns while the effect of cross-section type of encased steel is not significant. cracking of concrete cover, tension yielding of the extreme longitudinal bars and encased steel, crushing of concrete cover, concrete spalling, buckling of longitudinal bars and then buckling of encased steel plates. Hysteresis behaviorHysteretic curves and corresponding skeleton curves of lateral load vs the top displacement for the five specimens are plotted in Figure 6. The major damage states are marked on the curves. Note that all specimens generally show the deterioration of strength and stiffness after the first cycle at a given displacement level. With the increase of steel ratio, the hysteretic loop gets fatter, the hysteretic behavior becomes more Figure 6. Force-displacement hysteretic curves of specimens: (a) JZ1; (b) JZ2; (c) JZ3; (d) JZ4; (e) JZ5. SEISMIC PERFORMANCE OF MEGA SRC COLUMNS SUBJECTED TO CYCLIC LOADS 967

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Section: Introductionmentioning

confidence: 97%

Experimental study on seismic performance of mega steel-reinforced concrete columns subjected to cyclic loads

Jiang

Zhu³

2015

Struct. Design Tall Spec. Build.

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“…Steel reinforced concrete (SRC) columns have the advantages of steel columns and RC columns, such as high strength, stiffness, ductility and excellent performance of fire resistance and durability, which can reduce the space of columns in buildings effectively. During the past few decades, SRC columns with H-shaped steel and cross-shaped steel have been used in many tall buildings all over the world and many studies have been conducted for SRC columns to investigate the load-carrying capacity (Wang, 1999;Mirza and Lacroix, 2004;Kim et al, 2013), behavior under uniaxial bending and axial compressive load and its influence factors (El-Tawil and Deierlein, 1999;Li and Matsui, 2000;Hsu et al, 2004;Weng et al, 2008;Chen et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of mega steel reinforced concrete columns with different steel sections

Jiang

Zhu³

2016

Structural Design Tall Build

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Summary In recent years, the mega steel reinforced concrete (SRC) columns have been applied in super‐tall buildings. The previous research on SRC columns mainly focuses on the components with simple arrangement of encased steel, such as H‐shaped steel and cross‐shaped steel, with little attention paid to mega SRC columns that always have complicated encased steel and large steel ratio. The cyclic loading tests were carried out on scaled mega SRC column specimens with different cross‐section type of encased steel and steel ratio. The nonlinear three‐dimensional finite element and fiber element models were established respectively to simulate the inelastic behavior of mega SRC columns. The equivalent plastic strain of concrete, steel and rebar as well as the confinement effect on the concrete caused by the rebar and the steel plate were analyzed subsequently. By using the verified numerical model, the seismic behavior of specimens with different axial compression ratio was also studied. The test and analysis results indicate that the steel ratio and axial compression ratio have significant effects on the seismic performance of mega SRC columns, while the effect of cross‐section type of encased steel is not significant. Copyright © 2016 John Wiley & Sons, Ltd.

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“…As for the axial compression ratio, results from previous studies [18][19][20][21][22][23] indicate that the ductility of the SRC column with a normal encased steel ratio decreases rapidly when the axial load is higher than 0.4-0.5 times the bearing capacity. Thus, the axial compression ratio must be limited to ensure that each column possesses sufficient ductility and energy dissipation property.…”

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confidence: 99%

Experimental study on the static performance of steel reinforced concrete columns with high encased steel ratios

Zhao

Wen

Chen

et al. 2018

Structural Design Tall Build

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Summary The static performances of 12 steel reinforced concrete (SRC) columns with high encased steel ratios subjected to biaxial bending and axial loadings are studied experimentally. The main design parameters of the specimens in this experiment are the encased steel ratio, axial compression ratio, and shape distribution of the encased steel section. The crack formation, failure processes, bearing capacity, and ductility of the specimens are investigated in detail. The experimental results show that the increased encased steel ratio results in the increased bearing capacity and ductility of the specimens. Furthermore, the stiffness of the specimen degenerates gradually beyond the peak point with an increase in the axial compression ratio. In addition, a more extensive shape distribution of an encased steel section has a positive influence on the ductility of the specimen. A comparison of the yield and peak bearing capacities between the experimental results of this study and the predictions according to Eurocode 4 also highlights that Eurocode 4 would underestimate the bearing capacity of SRC columns with high encased steel ratios because it ignores the confinement of concrete provided from the steel section and hoops and it employs a conservative prediction approach for the simplified axial load‐bending moment curve.

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Experimental Study on Seismic Behavior of Full Encased Steel-Concrete Composite Columns

Cited by 61 publications

References 8 publications

Experimental study on seismic performance of mega steel-reinforced concrete columns subjected to cyclic loads

Experimental study on seismic performance of mega steel-reinforced concrete columns subjected to cyclic loads

Numerical simulation of mega steel reinforced concrete columns with different steel sections

Experimental study on the static performance of steel reinforced concrete columns with high encased steel ratios

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