Parametric analyses on the initial stiffness of the SHS column base plate connections using FEM

Khodaie, Sina; Mohamadi-shooreh, M.R.; Mofid, Massood

doi:10.1016/j.engstruct.2011.09.026

Cited by 11 publications

(6 citation statements)

References 23 publications

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“…Using the regression analysis approach, they derived a function for the initial stiffness of the base plate connection. The results showed a good agreement between the initial stiffness obtained from FEM and those measured in experimental models [12].…”

Section: Introductionsupporting

confidence: 70%

Design Methodology of Base Plates with Column Eccentricity in Two Directions under Bidirectional Moment

2018

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Base plate is a critical structural component responsible for transferring loads from the structure to the foundation. By increasing the contact surface between the column foot and the foundation, base plates contribute to more manageable distribution of column forces and the resulting stresses in the substructure. The off-center positioning of column on the base plate, which is sometimes unavoidable because of the limitations imposed by elevator shaft, adjacent buildings, etc. could be a major design issue. This paper investigates the effects of column eccentricity on the design and stress distribution of base plates and the impact of stiffeners on the thickness of these plates. In this investigation, a comparison is made between the superposition method and the finite element method in terms of their evaluation of stress levels under the base plate with column eccentricity. The study also aims to determine the magnitude and distribution of maximum stresses with plate’s thickness and dimensions and column’s position on the plate taken into account. The results show that the superposition method can be confidently used in the force analysis and design of base plates with column eccentricity under bidirectional moments.

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Section: Introductionsupporting

confidence: 70%

Design Methodology of Base Plates with Column Eccentricity in Two Directions under Bidirectional Moment

2018

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“…Subsequently, it is possible to use an analogy with a deformation problem that contains geometric equations [27,28] and derivations of the equations: (4) where Dc is the concrete diffusion coefficient [m 2 .s -1 ].…”

Section: Deriving the Finite Elementmentioning

confidence: 99%

Numerical model of time-dependent diffusion of chlorides in the concrete based on 2D four-node isoparametric element

Lehner

Konečný

2020

MATEC Web Conf.

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The enhancement of 2D model for the diffusion of chloride ions into reinforced concrete considering the time-dependent diffusion coefficient is discussed in the article. The non-stationary Finite Element Model is based on the four-node isoparametric element. The algorithm is implemented in MatLab compatible environment and an important part of source code is presented. The results of Finite Element Analysis are compared with the results of 2D analytical diffusion model.

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“…Results of the rotational stiffness and the concepts can be used in base plates designing procedure. In addition to the aforementioned studies, some studies have been conducted on base plates and columns with various shapes such as hollow sections [11][12][13]. Moreover, several experiments and numerical investigations have been carried out to show the behavior of base plates [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

A Numerical Investigation on Behavior of Column Base Plates with Different Configurations

Shafieifar

Khonsari

2018

CivileJournal

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Base plates are one of the most important types of connections in structures. Due to complicated steel-concrete interaction, simple assumptions of the stress distributions are usually employed for designing the connection. Simple assumptions of compressive stress distribution in concrete may accelerate the design procedure, but they may lead to overdesign results. In this study, six different types of base plates with different configuration were studied numerically using a commercial Finite Element (FE) software and the numerical model was calibrated with an experimental test. The models were subjected to a constant axial load and then a monotonic moment loading was applied. To investigate the effects of the axial load, several axial load level were considered for each configuration. As a result, moment-rotation curves of these base plates, including their rotational stiffness, in the absence and presence of the axial loads, were compared. Moreover, the stress distribution in the concrete was studied in the FE models. For all cases, the stress distribution in the concrete was semi-triangular with the maximum stress between the column flange and the edge of the plate. Based on numerical results, some concepts of simplified assumptions were proposed to find the stress distribution of the base plates. These assumptions are more realistic than current assumptions in structural specifications.

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Parametric analyses on the initial stiffness of the SHS column base plate connections using FEM

Cited by 11 publications

References 23 publications

Design Methodology of Base Plates with Column Eccentricity in Two Directions under Bidirectional Moment

Design Methodology of Base Plates with Column Eccentricity in Two Directions under Bidirectional Moment

Numerical model of time-dependent diffusion of chlorides in the concrete based on 2D four-node isoparametric element

A Numerical Investigation on Behavior of Column Base Plates with Different Configurations

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