Behavior and modeling of FRP-concrete-steel double-skin tubular columns made of full lightweight aggregate concrete

Zhou, Yingwu; Liu, Xiaoming; Xing, Feng; Li, Dawang; Wang, Yaocheng; Sui, Lili

doi:10.1016/j.conbuildmat.2016.12.154

Cited by 72 publications

(19 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another model was proposed by Yu and Teng [79] for the square FRP hybrid columns. The model of the FRP hybrid columns filled with light weight concrete was suggested by Zhou et al [72]. In cases of filled inner steel tube , the concrete core will be confined by both FRP and steel tubes [76].…”

Section: Assessment Of the Axial Behaviour Of The Frp Hybrid Columnsmentioning

confidence: 99%

“…The research concluded that the axial behaviour of columns showed excellent ductility and seismic resistance even for those that were made out of high strength concrete. Also, they stated that filling the lower inner part of the steel tube with concrete resulted in better behaviour.Different types of concrete were used to cast hybrid FRP columns by Cao et al[71], Zhou et al[72] and Zhang et al[73]. Cao et al[71] prepared and tested three types of hybrid FRP columns; FRP-concrete steel double skin column, FRP confined solid concrete column and FRP confined concrete filled steel column.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Structural applications of fibre reinforced polymer (FRP) composite tubes: A review of columns members

Al-saadi

Aravinthan

Lokuge

2018

Composite Structures

View full text Add to dashboard Cite

Use of fibre reinforced polymer (FRP) in column applications is increased because it can act as a confining material, a reinforcement and a structural column. The application of FRP tubes is correlated with the fibre orientation since tube stiffness is mainly attributed to the stiffness of fibres. Thus, for confinement, the fibres should align in the transverse direction of the tube while they should align in the axial direction when tubes are used as compression members. FRP tubes with fibres mainly in axial direction may reach failure because the stiffness in the perpendicular direction to fibres depends only on the stiffness of the matrix. In order to boost the stiffness in the secondary direction while supporting fibres in the main direction, fibres should be in multi-directions. This paper reviews and identifies gaps in knowledge on the use of FRP materials in column applications in new or existing construction regimes.

show abstract

Section: Assessment Of the Axial Behaviour Of The Frp Hybrid Columnsmentioning

confidence: 99%

mentioning

confidence: 99%

Structural applications of fibre reinforced polymer (FRP) composite tubes: A review of columns members

Al-saadi

Aravinthan

Lokuge

2018

Composite Structures

View full text Add to dashboard Cite

show abstract

“…Wang et al [26] tested hybrid DSTCs under lateral impact loading using a drop hammer testing facility and confirmed the excellent energy dissipation ability of hybrid DSTCs. Some variations of hybrid DSTCs were also investigated experimentally, including (1) use of light-weight concrete [28]; (2) use of recycled aggregate concrete [29]; (3) use of ribbed steel tubes [30]; (4) use of high-strength steel tubes [31]; (5) use of large-rupture-strain FRP tubes [32].…”

Section: Introductionmentioning

confidence: 99%

Elliptical FRP-Concrete-Steel Double-Skin Tubular Columns under Monotonic Axial Compression

Zhang

Feng

Wang

et al. 2020

Advances in Polymer Technology

View full text Add to dashboard Cite

Hybrid FRP-concrete-steel double-skin tubular columns (hybrid DSTCs) are a novel form of hollow columns consisting of an outer FRP tube, an inner steel tube, and an annular layer of concrete between the two tubes. Due to the effective confinement of the two tubes, the concrete in hybrid DSTCs is well confined, leading to excellent ductility and strength enhancement. Hybrid DSTCs also have excellent corrosion resistence due to the effective protection of the outer FRP tube. However, existing studies mainly focused on hybrid DSTCs with a circular cross-section. When subjecting to different loads in the two horizontal directions, elliptical columns are preferred as they can provide different bending stiffness and moment capacity around two axes of symmetry without significantly reducing the confining effect of the FRP tube. This paper extends the existing work on circular DSTCs to elliptical DSTCs with a particular focus on four issues: the effect of elliptical aspect ratio (i.e., the ratio of the major axis to the minor axis of the outer elliptical cross-section), the effect of the FRP tube thickness, the effect of void area ratio (i.e., the ratio of the area of concrete void to the area of the outer elliptical section), and the effect of the cross-section of the inner steel tube (i.e., both rectangular and elliptical steel tubes were used). Experimental results show that, the averaged peak stress of the confined concrete in elliptical DSTCs increases with the increase in the elliptical aspect ratio, whereas the elliptical aspect ratio has no obvious effect on the ultimate axial strain; the cross-section shape of the inner steel tube has significant effect on the axial stress-strain behavior of the confined concrete in elliptical DSTCs; elliptical DSTCs with an elliptical steel tube exhibit much better ductility and strength enhancement than those specimens with a rectangular steel tube. A simple stress-strain model of confined concrete was proposed for elliptical DSTCs to account for the effects of the elliptical aspect ratio, the inner void, and the shape of the inner steel tube, which can provide reasonably accurate but conservative predictions.

show abstract

“…Hybrid DSTCs consist of an inner tube made of steel, an outer tube made of FRP, and a concrete layer between the two tubes ( Figure 1(b)). Since the invention of hybrid DSTCs, extensive studies have been undertaken to study their behaviors under axial compression [20][21][22][23][24], cyclic loading [25,26], bending [27], and impacting loading [28]. Due to the confinement provided by the two tubes, the concrete in hybrid DSTCs is very well confined, leading to excellent strength enhancement and ductility improvement.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fiber Angles on Hybrid Double‐Tube Concrete Columns under Monotonic Axial Compression

Zhang

Yao

Huang

et al. 2019

Advances in Civil Engineering

View full text Add to dashboard Cite

Hybrid double-tube concrete columns (hybrid DTCCs) are a novel form of hybrid columns that combine fiber-reinforced polymer (FRP) composites with two traditional construction materials (i.e., concrete and steel). Hybrid DTCCs consist of an outer FRP tube and an inner steel tube aligned concentrically, with the space between the two tubes and inside of the steel tube filled with concrete. The three materials (i.e., FRP, concrete, and steel) in hybrid DTCCs are combined optimally to deliver excellent performances, such as excellent ductility and remarkable corrosion resistance. Recently, hybrid DTCCs have received increasing research attention on their compressive behavior. Existing studies, however, are focused on hybrid DTCCs with fibers of the FRP tube oriented in the hoop direction or close to the hoop direction. Against this background, this paper presents a series of monotonic axial compression tests on hybrid DTCCs with a particular focus on the effect of fiber angles (i.e., the angle of the fiber orientations to the longitudinal axis of the FRP tube). Three types of fiber angles (i.e., ±45°, ±60°, or ±80°) and two FRP tube thicknesses (i.e., 4 mm and 8 mm) were employed in the present study. Experimental results show that the concrete in hybrid DTCCs is well confined by both the FRP tube and the steel tube, leading to excellent ductility; the confinement effect of the FRP tube increases with the increase of the absolute value of fiber angles, whereas the ultimate axial strain decreases with the increase of the absolute value of fiber angles. An existing analysis-oriented model, which considers the different confining states of the concrete between the two tubes and that inside of the steel tube, is verified using the present test results. The model is capable of providing accurate predictions for hybrid DTCCs with a ±80° FRP tube. For hybrid DTCCs with a ±45° or ±60° FRP tube, the model yields reasonable accurate predictions for the peak axial load but underestimates the ultimate axial strain consistently.

show abstract

Behavior and modeling of FRP-concrete-steel double-skin tubular columns made of full lightweight aggregate concrete

Cited by 72 publications

References 27 publications

Structural applications of fibre reinforced polymer (FRP) composite tubes: A review of columns members

Structural applications of fibre reinforced polymer (FRP) composite tubes: A review of columns members

Elliptical FRP-Concrete-Steel Double-Skin Tubular Columns under Monotonic Axial Compression

Effect of Fiber Angles on Hybrid Double‐Tube Concrete Columns under Monotonic Axial Compression

Contact Info

Product

Resources

About