Cyclic behavior and design methodology of exposed base plates with extended anchor bolts

Torres‐Rodas, Pablo; Medalla, Miguel; Zareian, Farzin; López-García, Diego

doi:10.1016/j.engstruct.2022.114235

Cited by 16 publications

(6 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Direct access to the collected data provides more reliable checking principles for the verification models and enhances the certainty of the modeling techniques in either finite element simulations or analytical studies. Furthermore, the variety of column bases is wider than the established column base configurations in northern America (Torres-Rodas et al, 2022). The invented connections also enrich the column base literature (Freddi et al, 2020; Hassan et al, 2022).…”

Section: Test Objectives and Data Reusementioning

confidence: 97%

“…Base plate design guidelines currently focus on proportioning exposed and embedded column bases (American Institute of Steel Construction (AISC), 2016b, 2018; Fisher and Kloiber, 2006) for building loads. In the past decade, several studies have sought to characterize the response of the column bases in detail for both exposed and embedded types (Borzouie et al, 2015; Gomez et al, 2010; Grilli et al, 2017; Steenhuis et al, 2008; Torres-Rodas et al, 2017, 2022). From this body of research, analytical models are developed to estimate the column base hysteretic response (Torres-Rodas et al, 2016, 2018) and used in system-level studies to predict the Steel Moment Frame response to seismic loads (Torres-Rodas et al, 2020; Zareian and Kanvinde, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Test program on stiffened column bases subjected to cyclic loading

Behboud

Zareian

Rezaeian³

2023

Earthquake Spectra

Self Cite

View full text Add to dashboard Cite

This article presents the recorded data from an experimental campaign on stiffened steel column bases. The connection configuration comprises an exposed base plate on which vertical stiffeners are welded to strengthen the assembly. Using stiffened column bases is common in several countries where providing thick steel plates is not practical. However, despite their broad application in existing steel structures, there was rare experimental data collected exclusively on their hysteresis response to seismic excitations. The designed testing program intends to document the connection behavior under cyclic loading. This article describes the data collection process, including specimen geometry, material properties, construction details, test setup, instrumentation, and loading history. The qualitative observations are reported to support the data application, and the recorded data set is deposited publicly for future use (DOI: 10.5281/zenodo.7058873).

show abstract

Section: Test Objectives and Data Reusementioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Test program on stiffened column bases subjected to cyclic loading

Behboud

Zareian

Rezaeian³

2023

Earthquake Spectra

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition, the column axial shortening by local buckling which may be a critical consideration in low‐rise SMFs from the reparability and building demolition perspective and can be avoided by adopting the anchor‐yielding column base 20 . The other unique feature of this type of design is a simple retrofit option, where constructors retighten elongated anchor rods with ensured ductility by specifications 21 …”

Section: Introductionmentioning

confidence: 99%

“…20 The other unique feature of this type of design is a simple retrofit option, where constructors retighten elongated anchor rods with ensured ductility by specifications. 21 As a standard repair method for damaged exposed-type column bases, the applicability and effectiveness of the retightening process of anchor rods need to be examined. The re-tightened anchor rod reduces its deformation capacity, and thus the remaining deformation capacity is a key factor for adopting this repair method.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of repairing yielding anchor rods in exposed column bases in steel structures

Lin,

Kurata,

Pettinga

et al. 2024

Earthq Engng Struct Dyn

View full text Add to dashboard Cite

One of the features of Japanese structural steel design is an economical design option for yielding exposed column bases before first‐story columns, namely weak‐base/strong‐column design, which is unlike the strict capacity design for column bases. This study aims to develop a repair methodology that identifies damage states of the yielding column bases and anchor rods, and selects appropriate repair/retrofit methods. As a standard repair method for damaged exposed‐type column bases, the applicability and effectiveness of the re‐tightening process of anchor rods need to be examined. This study first reviews the literature on standard retrofit techniques for column bases and required deformation capacity of ductile anchor rods. The threaded anchor rod deformation capacity with different steel grades and screw threads commonly used were tested to clarify the required ductility. To clarify the reparability of exposed column bases, numerical models of four‐ and six‐story steel moment resisting frame buildings were developed and validated by shaking table test results. The results show that this simple repair method was proven to be effective through the test program and numerical analysis and it's not always applicable for standard anchor rods assumed for pin or fixed column bases designed to remain elastic. Finlly, a repair methodology and flow chart that identifies the damage states of anchor rods and selects appropriate repair/retrofit methods for the exposed steel column base was suggested and applied to the simulation results.

show abstract

“…It should be noted that the effective length of the anchor rod is one of the most important parameters for determining stiffness. This effective length can be estimated as equal to 8 times the diameter of the anchor rod [26]. In addition, other experimental and numerical studies have indicated that a rigid column base with 4 anchor rods has a mechanical behavior characterized by the deformation of the base plate in the tension zone and the concrete crushing in the compression zone of the connection [27].…”

Section: Introductionmentioning

confidence: 99%

Connection of a Steel Column Base Plate: Mechanical Behavior and Stiffening Effects

et al. 2022

View full text Add to dashboard Cite

This paper investigates the behaviour of a steel column base connection subjected to a bending moment and compressive axial force. The behaviour of this connection is quite complex due to the number of components, such as the base plate, anchor rods, and stiffeners, to be considered in the numerical models. Moreover, a nonlinear three-dimensional finite element model was used to simulate the column base connection. This model can be used to analyze the moment-rotation relationship for the connection through the validation of numerical modeling with those given by the experimental test results and compared with the analytical model based on the components method of Eurocode 3. It was shown that in addition to the stiffness and bending resistance of the column base connection, other mechanical parameters, such as moment-rotation shape, stress distribution, and prying actions, can be significantly influenced by changing the properties of the components. It has been demonstrated that the anchor rod is not only affected by the axial force but also by a local moment that is not taken into consideration by the analytical model of Eurocode3. An extensive parametric study on stiffeners showed very interesting effects obtained by adding the welded stiffeners to the column base connections. Doi: 10.28991/CEJ-2022-08-09-02 Full Text: PDF

show abstract

Cyclic behavior and design methodology of exposed base plates with extended anchor bolts

Cited by 16 publications

References 26 publications

Test program on stiffened column bases subjected to cyclic loading

Test program on stiffened column bases subjected to cyclic loading

Effectiveness of repairing yielding anchor rods in exposed column bases in steel structures

Connection of a Steel Column Base Plate: Mechanical Behavior and Stiffening Effects

Contact Info

Product

Resources

About