Study on preloading reduction of ultimate load of circular concrete-filled steel tubular columns

Huang, Fuyun; Yu, Xinmeng; Chen, Baochun; Li, Jianzhong

doi:10.1016/j.tws.2015.10.015

Cited by 24 publications

(10 citation statements)

References 8 publications

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Section: Parametric Analysis Of the Reduction Factorcontrasting

confidence: 53%

“…However, for an arch with rise-to-span ratio less than 0.25, the effect of ISL on K p is much larger (up to 25%). This reduction is slightly larger than the comparable values reported for CFST columns (Huang et al, 2012(Huang et al, , 2016Li et al, 2012;Liew and Xiong, 2009). Comparing Figure 18 (a) and (b), it can be found that, under different loading modes, the pattern of initial stress influence on ultimate bearing capacity is basically similar.…”

Section: Loading Configurationcontrasting

confidence: 49%

“…For K p ( β,λ ), it can be employed from the formula of CFST columns in Huang et al (2016) based on the equivalent beam–column method that transforms the arch rib into beam–column. For K p ( β , υ ) , it can be evaluated using a regression analysis of the parametric study presented in this article.…”

Section: Parametric Analysis Of the Reduction Factormentioning

confidence: 99%

“…From these works, it can be concluded that the preloading on the steel tube can affect the behavior of CFST slender beam-column significantly, such as accelerating the yielding of the steel tube, degrading the confinement effect on the concrete core, and reducing the ultimate loading (UL) capacity of the CFST column; therefore, it must be taken into account in design. In the above-referenced works, various strength evaluation methods considering ISL were proposed, and one of them has now been implemented by China as a part of National Standard Specification on the design of CFST arch bridges (Huang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation on ultimate load-carrying capacity of concrete-filled steel tubular arch structure with preload

Huang

Cui

Dong

et al. 2019

Advances in Structural Engineering

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When casting wet concrete into hollow steel tubular arch during the construction process of a concrete-filled steel tubular arch bridge, an initial stress (due to dead load, etc.) would be produced in the steel tube. In order to understand the influence of this initial stress on the strength of the concrete-filled steel tubular arch bridge, a total of four single tubular arch rib (bare steel first) specimens (concrete-filled steel tubular last) with various initial stress levels were constructed and tested to failure. The test results indicate that the initial stress has a large influence on the ultimate load-carrying capacity and ductility of the arch structure. The high preloading ratio will reduce significantly the strength and ductility that the maximum reductions are over 25%. Then, a finite element method was presented and validated using the test results. Based on this finite element model, a parametric study was performed that considered the influence of various parameters on the ultimate load-carrying capacity of concrete-filled steel tubular arches. These parameters included arch slenderness, rise-to-span ratio, loading method, and initial stress level. The analysis results indicate that the initial stress can reduce the ultimate loading capacity significantly, and this reduction has a strong relationship with arch slenderness and rise-to-span ratio. Finally, a method for calculating the preloading reduction factor of ultimate load-carrying capacity of single concrete-filled steel tubular arch rib structures was proposed based on the equivalent beam–column method.

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Section: Parametric Analysis Of the Reduction Factorcontrasting

confidence: 53%

Section: Loading Configurationcontrasting

confidence: 49%

Section: Parametric Analysis Of the Reduction Factormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation on ultimate load-carrying capacity of concrete-filled steel tubular arch structure with preload

Huang

Cui

Dong

et al. 2019

Advances in Structural Engineering

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“…Since preload may have significant influences on the behavior of CFST structures, many researchers, e.g. Zha [18] , Han [19] , Huang [20] , Patel [21] and Liew [22] , carried out extensive theoretical and experimental investigations on the effect of preload on CFST structures at room temperature. For example, Liew et al [22] proposed formulas for calculating stability factor of preloaded columns by considering preload as an equivalent form of initial bending denoted by a preload influence factor and the formulas were given on the basis of the Eurocode 4 formulas without preload.…”

Section: Instructionmentioning

confidence: 99%

Fire resistance of concrete-filled steel tube columns with preload. Part I: Experimental investigation

Tan

Huang

et al. 2019

Composite Structures

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Preload in a cast-in-situ concrete-filled steel tube (CFST) structure is an important parameter that has been studied and considered in design and construction. However, the impact of a preload on fire resistance of CFST has not been taken into account in the existing design method of CFST under fire. In this paper, twelve CFST columns with and without preload in the steel tubes are experimentally studied to investigate their heating process, failure modes, thermal and structural responses. The test results show that preload of the steel tube has significant impact on the fire resistance of some of the columns. Further investigations on this important observation will be done numerically in a companion paper [24] to carry out a more comprehensive parametric study.

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Experimental and Numerical Study on the Bearing Behaviour of Confined Concrete Arch for a Traffic Tunnel

Jiang,

Xin,

Wang

et al. 2023

Int J Civ Eng

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Study on preloading reduction of ultimate load of circular concrete-filled steel tubular columns

Cited by 24 publications

References 8 publications

Evaluation on ultimate load-carrying capacity of concrete-filled steel tubular arch structure with preload

Evaluation on ultimate load-carrying capacity of concrete-filled steel tubular arch structure with preload

Fire resistance of concrete-filled steel tube columns with preload. Part I: Experimental investigation

Experimental and Numerical Study on the Bearing Behaviour of Confined Concrete Arch for a Traffic Tunnel

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