Parametric Finite-Element Modeling for Exposed Steel Moment Frame Column Baseplate Connections Subjected to Lateral Loads

Trautner, Christopher; Hutchinson, Tara C.

doi:10.1061/(asce)st.1943-541x.0001990

Cited by 12 publications

(9 citation statements)

References 9 publications

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“…The base connections (Figure C) were modeled using a general approach that has previously been validated for use in modeling similar exposed, moment‐resisting baseplate connections (Trautner and Hutchinson). The anchors were modeled using tension‐only nonlinear springs with a force‐deformation response input based on tension testing of the anchor material (Figure 3A).…”

Section: Numerical Modelingmentioning

confidence: 99%

Shake table testing of a miniature steel building with ductile‐anchor, uplifting‐column base connections for improved seismic performance

Trautner

Hutchinson

Grosser

et al. 2018

Earthq Engng Struct Dyn

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Summary Previous research has demonstrated that uplifting‐column or rocking building systems may exhibit improved seismic performance, including reductions in total base shear and decreased residual drift, when compared with systems rigidly connected to the foundation. These beneficial effects may be due to lengthened periods, activation of rocking modes, and energy dissipation of base fuse elements. In the current work, several configurations of a miniature steel building with different combinations of base connection and traditional superstructure fuse strength and stiffness were subjected to identical earthquake motions to evaluate differences in demands and performance. The uplifting base connections incorporate highly ductile concrete anchors with long stretch lengths, allowing robust connection performance and easy replacement of damaged connection elements following the seismic event, an advantage over previously tested systems. Testing and dynamic numerical analysis indicates that ductile anchor uplifting systems may reduce total base shear by over 20%, as well as reducing residual structural drift by more than 80%.

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Section: Numerical Modelingmentioning

confidence: 99%

Shake table testing of a miniature steel building with ductile‐anchor, uplifting‐column base connections for improved seismic performance

Trautner

Hutchinson

Grosser

et al. 2018

Earthq Engng Struct Dyn

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“…The three critical parameters of the analytical investigation are selected from the literature review conducted by Grauvilardell et al [1] as well as the previous parametric study done by Trautner and Hutchinson [20] where they categorized different parameters of CBP connection into low, medium, and high category. Based on these studies, three critical parameters with variable ranges are considered in this study.…”

Section: Parametric Analysis Casesmentioning

confidence: 99%

Parametric Study of Steel Column-Base Connection Subjected to Bidirectional Bending and Axial Compression

Kabir¹,

Billah²

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Column base plate connection is one of the most critical structural components of steel momentresisting frames which acts as a transfer medium to transmit the reaction forces, shear and moments from the entire building into the foundation. Failure of these base plate connections is critical since it can result in the collapse of the entire structure. Very often these base plates experience bidirectional lateral loadings from natural events such as wind and earthquake. Previous studies considered uniaxial lateral loading combined with axial load but do not provide any guidelines for exposed column base plate connections under axial load and biaxial lateral loading. This study aims to develop an accurate nonlinear finite element (FE) model of exposed column-base connections under combined axial load and bi-axial lateral loading using general purpose finite element software ABAQUS. The developed model is validated against experimental results under monotonic and cyclic loading considering both geometric and material nonlinearities to check the accuracy of the model. After validation, a bidirectional symmetric lateral loading combined with constant axial compressive load is applied in the developed model to analyze the response of the column-base plate connections. Further, the effects of three different parameters of column base plate connection such as base plate thickness, base plate yield strength, and anchor rod diameter are investigated through parametric study. Results show that higher value of base plate thickness and anchor rod diameter significantly affect both the stiffness and strength of column base connections. It also demonstrates that base plate yield strength has no significant influence on column base connections.

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“…More recently, Trautner and Hutchinson 2018 [30] presented a procedure for parametric FE simulations of EBPs (with different details) subjected to combined Axial and Moment loads, validating the models against numerous experimental tests. Hassan et al, 2021 [24] studied with FE simulations the behavior (i.e., internal force distribution) of EBPs under combined Axial Compressive Force and Biaxial Bending.…”

Section: Finite Element Modelsmentioning

confidence: 99%

Advances in Computational and Analytical Models for Column Base Connections

Torres‐Rodas¹

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Column Base Connections (CBCs) are one of the most important components of Steel Moment Frames (SMFs) since these connections transfer the loads (e.g., gravity, wind, or earthquake loads) from the superstructure to the foundation. Because of it, CBCs have been extensively studied over the last decade through large-scale experimental programs and computational models that have led to the development of well-developed design guides such as the Design Guide 1 (DG1). Early analytical models were developed to predict the strength of CBCs, while subsequent studies estimated their rotational Stiffness, as well as deformation capacity. Modern studies on the topic have been developed to explore their behavior further with sophisticated finite element simulations. Moreover, their high deformation capacity with desirable hysteretic properties has called the researcher's attention to incorporate CBCs as part of the energy dissipation system.The broad research conducted on this area points to the importance of CBCs. Motivated by this issue, this paper summarizes the (state of the art) analytical and numerical models that characterize the behavior of CBCs. First, the different types of CBCs used in the industry are described. Next, the analytical models to predict their strength, rotational Stiffness, and hysteretic properties are summarized. Strategies for the development of finite element models, as well as results from simulations, are detailed. The influence of column base behavior on the global performance of SMFs (varying in height) is described. Finally, the author's essential results from ongoing research on ductile base plates are discussed, and lines for future investigations are recommended.

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Parametric Finite-Element Modeling for Exposed Steel Moment Frame Column Baseplate Connections Subjected to Lateral Loads

Cited by 12 publications

References 9 publications

Shake table testing of a miniature steel building with ductile‐anchor, uplifting‐column base connections for improved seismic performance

Shake table testing of a miniature steel building with ductile‐anchor, uplifting‐column base connections for improved seismic performance

Parametric Study of Steel Column-Base Connection Subjected to Bidirectional Bending and Axial Compression

Advances in Computational and Analytical Models for Column Base Connections

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