Behaviour of Steel Tubular Stub and Slender Columns in-filled with Recycled Aggregate Concrete

Mohanraj, E.; Kandasamy, S.; Malathy, R.

doi:10.4314/jcerp.v6i1.45184

Cited by 14 publications

(16 citation statements)

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“…Their results show a similar bearing capacity for the members and also that any differences in load-bearing capacity can be disregarded in practice. The properties of RACFST long columns have been reported by Mohanraj et al (2011), Zhang et al (2013) and Yang and Han (2006b). The experimental results indicate that a RACFST long column under eccentric compression loading has similar loading and deformation capacities compared to normal CFST columns.…”

Section: Racfst Long Columnssupporting

confidence: 56%

“…However, the American Concrete Institute (ACI) equation (2005) and the Australian Standards (AS) equation (1994) predict lower values than the measured ones. It was reported by Mohanraj et al (2011) that, to obtain the same loading capacity, square RACFST columns can save 30% of steel when compared with circular RACFST ones. Comparison between the failure patterns of stub and long RACFST columns is presented in Figure 12.…”

Section: Racfst Long Columnsmentioning

confidence: 99%

“…The replacement ratio has moderate influence on the bearing capacity. Mohanraj et al (2011) experimentally studied the behaviour of circular and square RACFST columns under axial loading. The results show that the Eurocode-4 (2004) gives the best estimation for both columns with normal concrete and RAC.…”

Section: Racfst Long Columnsmentioning

confidence: 99%

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Structural Behaviour of Composite Members with Recycled Aggregate Concrete — An Overview

Xiao

Shi

et al. 2015

Advances in Structural Engineering

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A series of investigations on structural behaviour, durability, fire-resistance and seismic performance of composite members with recycled aggregate concrete (RAC) have been carried out in the past 10 years (2005–2014). This paper is consisted of three parts: the first part introduces and discusses the research progress in regard to the structural behaviour of RAC filled steel tubular columns and beams; the second part concentrates on the structural behaviour of steel-reinforced RAC members, including columns, beams, shear walls and slabs; and the third part focuses on the long-term performance of composite members with RAC, involving fire resistance, durability and seismic performance. It seems that RAC composite members with different replacement ratios of recycled coarse aggregate have slightly lower or similar structural behaviour compared to that of normal concrete composite members. Review results reveal that it is feasible to apply steel-RAC composite members as structural applications. This intensive review provides a reasonable knowledge of the structural behaviour of steel-RAC composite members, and recommends further investigations on the failure mechanics and durability of steel-RAC composite members which are needed to promote safe and economic application in the future.

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Section: Racfst Long Columnssupporting

confidence: 56%

Section: Racfst Long Columnsmentioning

confidence: 99%

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Structural Behaviour of Composite Members with Recycled Aggregate Concrete — An Overview

Xiao

Shi

et al. 2015

Advances in Structural Engineering

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“…Over the past 17 years, a number of works have reported on the performance of recycled aggregate concrete-filled steel tube (RACFST) members (e.g. Konno et al, 1997Konno et al, , 1998Mohanraj et al, 2011;Tam et al, 2014;Xiao et al, 2014;Yang andHan, 2006a, 2006b;Yang and Hou, 2012;Yang and Ma, 2013;Yang et al, 2008). The results of these studies verified that the failure modes of the steel tubes and concrete cores and the bond performance between the steel tubes and the core concrete of RACFST members were similar to those of CFSTs.…”

Section: Introductionmentioning

confidence: 99%

Behaviour and design calculations of recycled aggregate concrete-filled steel tube (RACFST) members

Yang

Hou

2015

Magazine of Concrete Research

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This paper describes research work on the performance and design calculations of recycled aggregate concrete filled steel tube (RACFST) members, especially the most recent developments in China. Firstly, experimental studies on RACFST members subjected to short-term static loading, long-term sustained loading and cyclic flexural loading are summarised and analysed, and recent advances in the behaviour of RACFST stub columns after exposure to high temperatures (300-8008C) are also reviewed. The experimental results show that, in general, RACFST members have similar performance to concrete filled steel tube (CFST) members when subjected to the same loading conditions. However, due to the more serious inherent defects of recycled aggregate concrete compared with normal concrete, RACFST members have a lower bearing capacity and stiffness than their CFST counterparts. Secondly, design formulae for RACFST members are suggested and the calculated bearing capacities using the simplified equations generally agree well with the experimental results. Finally, the potential research needs of RACFST structures are discussed. NotationA c cross-sectional area of concrete A s cross-sectional area of steel A sc cross-sectional area of RACFST column D outside diameter of circular steel tube or width of square steel tube e load eccentricity f ck,r characteristic compressive strength of recycled aggregate concrete (RAC) f cu,r cube compressive strength of RAC f scy,r strength factor f y yield strength of steel k T strength reduction factor considering the effect of maximum temperature L effective buckling length of member in the plane of bending M moment M u flexural capacity of RACFST beam M uc calculated flexural capacity of RACFST beam M ue experimental flexural capacity of RACFST beam N axial compressive load N 0 cross-sectional strength N E Euler critical force N u bearing capacity of RACFST column under concentric compression N uc calculated bearing capacity N ue experimental bearing capacity N ue,cfst bearing capacity of CFST specimens N ue,racfst bearing capacity of RACFST specimens N ue,w bearing capacity of specimens with long-term sustained loading N ue,wo bearing capacity of specimens without long-term sustained loading N u,T strength of RACFST stub columns after exposure to high temperature n long-term sustained load ratio n 0 axial compressive load ratio r unified recycled aggregate replacement ratio r c recycled coarse aggregate replacement ratio r f recycled fine aggregate replacement ratio T m maximum temperature t wall thickness of steel tube W sc section modulus of RACFST member AE steel ratio ª m flexural capacity factor ç 0 intermediate variable º slenderness ratio º o slenderness ratio limit for elastic-plastic buckling of RACFST member under concentric compression º p slenderness ratio limit for elastic buckling of RACFST member under concentric compression î r confinement factor r 0 intermediate variable ö stability factor 611

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“…In the past few decades, many types of materials were encased in the steel tubes, considering environmentally friendly materials in order to minimize pollution and energy consumption, For example, steel tubes filled with RAC [11][12][13][14][15] involving the reuse of waste concrete, self-consolidating concrete without vibration benefits for construction and energy saving [16,17], and polymers or polymer-based materials as positively considered to enhance the structural behaviour of columns with higher tensile and adhesion capacity, lower weight and shrinkage, as well as high ductility [18][19][20]. So far, research shows that some mechanical properties and structural behaviour of RAC filled steel tubular (RACFST) columns can be improved with better ductility compare with OPC filled steel tubes [11,12,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Structural behaviour of geopolymeric recycled concrete filled steel tubular columns under axial loading

Shi

Wang

Zhao

et al. 2015

Construction and Building Materials

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Behaviour of Steel Tubular Stub and Slender Columns in-filled with Recycled Aggregate Concrete

Cited by 14 publications

References 0 publications

Structural Behaviour of Composite Members with Recycled Aggregate Concrete — An Overview

Structural Behaviour of Composite Members with Recycled Aggregate Concrete — An Overview

Behaviour and design calculations of recycled aggregate concrete-filled steel tube (RACFST) members

Structural behaviour of geopolymeric recycled concrete filled steel tubular columns under axial loading

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