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Open AccessArticle

Monotonic Response of Exposed Base Plates of Columns: Numerical Study and a New Design Method

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Instituto de Materiales y Modelos Estructurales, Facultad de Ingeniería, Universidad Central de Venezuela, Ciudad Universitaria, Los Chaguaramos Caracas 1051, Venezuela
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Depto. Ingeniería Civil. Facultad de Ingeniería, Universidad Católica de la Santísima Concepción, Alonso de Ribera 2850, Concepción 4090541, Chile
*
Author to whom correspondence should be addressed.
Metals 2020, 10(3), 396; https://doi.org/10.3390/met10030396
Received: 27 February 2020 / Revised: 16 March 2020 / Accepted: 18 March 2020 / Published: 19 March 2020
(This article belongs to the Special Issue Advances in Structural Steel Research)
This paper describes a numerical study of the behavior of exposed base plates of columns under the action of axial and bending loads. The aim of this research is to evaluate numerically the failure mechanisms on stiffened and non-stiffened base plates and propose a new design method. The effects of base plate thickness, location of anchor rods, location of stiffeners and tensile strength of anchor rods were considered in the analysis. Sixteen finite elements simulations were performed considering different combinations of the above mentioned parameters. The results show a fragile response in the base plates when high resistance anchor rods are used. The anchor rods worked as fuse elements in base plates with a large thickness or many stiffeners. Additionally, the models with anchor bars located outside of the column flanges showed lower flexural strength and rotational stiffness compared to the models with anchor rods located between column flanges. The simulations showed that the base plate strength was determined by the simultaneous failure mechanisms of two or more components, different to what is stated in current design guides. Finally, the new method is suitable to design base plates with stiffened and not stiffened configurations, which unlike traditional design methods, show a good adjustment with numerical models. View Full-Text
Keywords: exposed column; base plate; stiffeners; yield line; anchor rods; rotational stiffness; ductility exposed column; base plate; stiffeners; yield line; anchor rods; rotational stiffness; ductility
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MDPI and ACS Style

Díaz, H.; Nuñez, E.; Oyarzo-Vera, C. Monotonic Response of Exposed Base Plates of Columns: Numerical Study and a New Design Method. Metals 2020, 10, 396.

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