Experimental behaviour of eccentrically loaded slender circular hollow steel columns in-filled with fibre reinforced concrete

gopal, Shanthosh; Manoharan, P.

doi:10.1016/j.jcsr.2005.09.004

Cited by 61 publications

(24 citation statements)

References 5 publications

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“…The crack control and serviceability benefits lead to substantial increase in the concrete tensile strength and consequently better performance in flexure. Gopal and Manoharan [14] carried out twelve slender carbon steel tubular circular columns filled with both plain and steel FR concrete. The test specimens were tested under eccentric compression to investigate the effects of FR concrete on the strength and behaviour of the composite columns.…”

Section: Introductionmentioning

confidence: 99%

“…The load-midheight lateral deflection and load-strain curves were reported in the paper. The study [14] has shown that the use of FR concrete as infill material has a considerable effect on the strength and behaviour of slender composite columns. However, experimental investigations highlighting the performance of FR concrete-filled stainless steel tubular columns are rarely found in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of eccentrically loaded fibre reinforced concrete-filled stainless steel tubular columns

Ellobody

Ghazy

2012

Journal of Constructional Steel Research

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental investigation of eccentrically loaded fibre reinforced concrete-filled stainless steel tubular columns

Ellobody

Ghazy

2012

Journal of Constructional Steel Research

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“…To investigate the structural performance of five specimens with the same design strength of 10,740 kN, axial load was applied by the universal testing machine of 30,000 kN capacity at a loading rate of 0.002 mm/s, as shown in Figure . This was to prevent an increase or variation of the maximum load value when the specimen is moved at high speeds and to standardize the loading conditions of all specimens . To prevent debris from shattering and scattering during the experiment, a transparent wrap was used to cover the specimen, as shown in Figure .…”

Section: Experimental Overviewmentioning

confidence: 99%

Experimental tests for improving buildability of construction methods for high‐strength concrete columns in high‐rise buildings

Shim

Kim

Park

2018

Structural Design Tall Build

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High-strength concrete columns have the advantage of increasing the amount of usable area in the building because the cross-section of the columns takes up less space compared with columns using normal strength concrete. However, it is difficult to weld the steel reinforcement and steel members because of the narrow column width due to a decrease in the cross-section of the column, thereby causing construction delay in many cases. In this paper, five construction methods with different details for high-strength reinforced concrete columns are tested to improve the buildability of the columns. Five specimens with different construction details were tested and analyzed based on four aspects: (a) the relationship between load and displacements, (b) strain distributions, (c) axial stiffness, and (d) crack patterns. Specimens were constructed using concrete with a compressive strength of 55 MPa, and the design strength of all five specimens were set to about 10,740 kN. From results of the experiment, the specimen with a reduced number of vertical reinforcements from 24 of HD22 (SD400, Fy = 400 MPa) to 16 of UD22 (SD600, Fy = 600 MPa) was the most effective specimen to improve the buildability of the column without deteriorating the structural performance of the reference specimen. KEYWORDS buildability of columns, construction detail, experimental test, high-rise buildings 1 | INTRODUCTION High-strength concrete columns have the advantage of increasing the amount of usable area in the building because the cross-section of the columns takes up less space compared with columns using normal strength concrete. However, because high-strength concrete columns have high compressive strength, they can show brittle fracture behaviors depending on the method of reinforcement that is used. Therefore, verifying that the columns used in construction have sufficient stiffness and deformation capacity is extremely important. [1][2][3][4][5][6] In addition, when high-strength concrete is used for construction of high-rise buildings, it is difficult to weld the steel reinforcement and steel members because of the narrow column width due to a decrease in the cross-section of the column, thereby causing construction delay in many cases. For example, as shown in Figure 1a, when a high-strength reinforced concrete mega-column of a high-rise building is joined with a steel outrigger at the upper part of the building, many construction problems arise due to the narrowness of the joint. As shown in Figure 1b, the constructability problems that can occur at the junction of the column-outrigger member can be divided into four cases: (a) when the outrigger member is connected to the inside of the column, the vertical reinforcements of the column, and the lateral reinforcements of girders and the slab are placed in a narrow space. The compact arrangement of the reinforcements reduces the constructability (anchor ties in Figure 1b should be welded to the sloping post of the outrigger, but this becomes difficult due to the lack of space). (b) The ...

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“…The effects of different geometry and dimensions of the cross sections were investigated for a given length of the CFT and simplified expressions to predict ultimate load of short columns were proposed [17]. Previous research on slender circular composite columns shows that the strength of the column decreases as the slenderness ratio increases [18]. For thin walled composite filled columns under axial compression, strength was found to decrease with the increase of slenderness ratio and strength reduction occurred at a much higher rate for slender columns with slenderness ratio equal to or less than 24 [19].…”

Section: Nomenclaturementioning

confidence: 99%

Axial strength of circular concrete-filled steel tube columns — DOE approach

Chitawadagi

Narasimhan

Kulkarni

2010

Journal of Constructional Steel Research

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Experimental behaviour of eccentrically loaded slender circular hollow steel columns in-filled with fibre reinforced concrete

Cited by 61 publications

References 5 publications

Experimental investigation of eccentrically loaded fibre reinforced concrete-filled stainless steel tubular columns

Experimental investigation of eccentrically loaded fibre reinforced concrete-filled stainless steel tubular columns

Experimental tests for improving buildability of construction methods for high‐strength concrete columns in high‐rise buildings

Axial strength of circular concrete-filled steel tube columns — DOE approach

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