Comparisons of concrete-encased composite column strength provisions of ACI code and AISC specification

Weng, C. C.; Yen, S. I.

doi:10.1016/s0141-0296(01)00067-0

Cited by 41 publications

(9 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Each load factor is associated with a different instability pattern, but typically the lowest load factor is of interest. The Buckling mode shapes do not represent actual displacement but it helps to visualize the deformation part while buckling [6] . The buckling analysis is used to determine the specific set of loads which cause buckling and to find the shape of the buckling mode.…”

Section: Buckling Analysismentioning

confidence: 99%

Buckling Analysis of Belly Shaped Composite Column

Kesavan¹,

Ramesh²,

Alexabhishek³

et al. 2018

IJET

View full text Add to dashboard Cite

The study of Non prismatic column is designed to minimize the volume of material in the column by changing its shape, the column is subject to both buckling and strength constraints under axial compression load. The belly column is designed as Encased Composite column to improve the strength and ductility of column. The effective use of material through optimal shape of the column. Five models have been created in ANSYS WORKBENCH and all the columns having the same volume of materials, fixed end conditions and length of column. The behaviour of non-prismatic column is always based on tapering ratio and the slenderness ratio of the column. As the taper ratio increases, the elastic buckling load increases and stress decreases in the mean while the maximum stress occurs in the prismatic column compared with the non-prismatic column. As a result of this analysis Equivalent stress, Equivalent elastic strain, Total Deformation and Buckling load Deformation was observed and hence Stress-Strain graphs, Load -Deformation graphs and Mode-Load multiplier graph had been plotted.

show abstract

Section: Buckling Analysismentioning

confidence: 99%

Buckling Analysis of Belly Shaped Composite Column

Kesavan¹,

Ramesh²,

Alexabhishek³

et al. 2018

IJET

View full text Add to dashboard Cite

show abstract

“…It is not at all simple to define the stiffness and bearing capacity of composite structural elements and the complexity is due to the concrete's anisotropic characteristics. Design codes [1][2] propose simplified methodologies for defining these stiffness parameters and full yield curve that can either approximate or hold off the actual behavior of the structure [3]. One alternative for obtaining accurate results in a way that is more computationally feasible is the Refined Plastic Hinge Method (RPHM).…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of nonlinear behavior of steel-concrete composite structures

Lemes

Silva

Silveira

et al. 2017

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

ResumoThis paper presents the development of an effective numerical formulation for analysis of steel concrete composite structures considering geometric and materials nonlinear effects. Thus, a methodology based on Refined Plastic Hinge Method (RPHM) was developed and the stiffness parameters obtained by homogenization of cross section. The evaluation of structural elements strength is done through the Strain Compatibility Method (SCM). The Newton-Raphson method with path-following strategies is adopted to solve nonlinear global and local (in cross section level) equations. The results are compared with experimental and numerical database presents in literature and a good accuracy is observed in composite cross section, columns and portal frames.Keywords: nonlinear analysis, RPHM, interaction curves, SCM, moment-curvature relationship.O presente trabalho apresenta o desenvolvimento de uma formulação numérica adequada para análise de estruturas mistas de aço e concreto considerando os efeitos da não linearidade geométrica e da inelasticidade dos materiais. Para tal, foi desenvolvida uma metodologia baseada no Método da Rótula Plástica Refinado (MRPR), sendo os coeficientes de rigidez obtidos por meio da homogeneização da seção transversal. A avaliação da capacidade resistente dos elementos estruturais é feita no contexto do Método da Compatibilidade de Deformações (MCD). Os problemas oriundos da consideração das fontes de não linearidade (global e local) são resolvidos por meio do método iterativo de Newton--Raphson acoplado a estratégias de continuação. Os resultados obtidos são comparados com aqueles fornecidos em análises experimentais e/ ou numéricas presentes na literatura, sendo verificada boa precisão nas análises de seções transversais mistas, pilares isolados mistos e pórticos simples mistos.Palavras-chave: análise não linear, MRPR, curvas de interação, MCD, relação momento-curvatura.

show abstract

“…Thus, in order to prevent the premature collapse of the concrete in the element, the steel strain of the profile and reinforcements shall also be limited to this value [18]. Weng and Yen [19] investigated the differences between the approaches of code ACI 318 [20] and AISC/LRFD [16] for the design of composite steel-concrete columns fully encased with concrete and evaluated how their results were close to the responses of a real column. This was confirmed by a series of statistical comparisons.…”

Section: Introductionmentioning

confidence: 99%

“…The computational package developed is called MDCOMP (2014) and was implemented in FORTRAN language. Results obtained using MDCOMP (2014) are compared with the responses defined by Part 1.1 of Eurocode 4 [2], which is one of the most important codes used to design this type of structural element, and also with the answers presented in the works of Saw and Liew [17], Weng and Yen [19] and Naka et al [7].…”

Section: Introductionmentioning

confidence: 99%

Construction of the interaction curve of concrete-encased composite columns based on the deformation domains of reinforced concrete sections

Rocha

Silva

2015

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

This paper proposes a methodology for obtaining the interaction curve for composite steel-concrete sections subject to combined compression and bending based on the deformation domains of reinforced concrete structures defined by ABNT NBR 6118 [1]. For this, were developed expressions for the axial force, the moment and the strains of concrete, longitudinal reinforcement and the elements comprising the metal profile in each deformation domain.Based on these expressions a computer program called MDCOMP (2014) was created. In this study the same limit values of longitudinal reinforcement strain defined by ABNT NBR 6118 [1] were used for the steel profile strains. To verify the numerical implementations performed, the interaction curves and the plastic resistance of the section obtained by MDCOMP program were compared with those determined from the recommendations of Eurocode 4 [2], of ABNT NBR 8800 [3] or literature responses.

show abstract

Comparisons of concrete-encased composite column strength provisions of ACI code and AISC specification

Cited by 41 publications

References 5 publications

Buckling Analysis of Belly Shaped Composite Column

Buckling Analysis of Belly Shaped Composite Column

Numerical analysis of nonlinear behavior of steel-concrete composite structures

Construction of the interaction curve of concrete-encased composite columns based on the deformation domains of reinforced concrete sections

Contact Info

Product

Resources

About