Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Parametric and Statistical Analysis of Bolted Column Base Connections with Yielding Angles under Cyclic Loading about the Weak Axis

Document Type : Original Article

Authors
1 Ph.D. Student, Shahid Nikbakht Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran
2 Professor, Shahid Nikbakht Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran
3 Associate Professor, Shahid Nikbakht Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran
Abstract
Base plate connections are critical in transferring axial and lateral loads from steel columns to foundations, especially during seismic events. Recently, replaceable low-damage connections have gained attention for enhancing structural resilience. This study explores the seismic behavior of a bolted base connection with yielding angles that eliminate on -site welding and reduce column damage. The methodology involves three stages: (1) validating a finite element (FE) model using experimental data, (2) performing a parametric study via the Taguchi Design of Experiment (DoE) method to examine the effects of angle thickness, axial load level, and anchor bolt distance from the column flange, and (3) applying analysis of variance (ANOVA) and multiple regression to identify significant parameters and develop a predictive flexural capacity model. Results reveal that angle thickness is the most influential factor. All configurations showed semi-rigid to flexible rotational behavior, with notable energy dissipation under cyclic loading. The close agreement between numerical and statistical outcomes confirms both the accuracy of the FE model and the efficiency of the Taguchi method. The proposed regression equation serves as a practical tool for estimating connection strength in performance-based design. This research supports the development of advanced low- damage connection design strategies for steel structures.
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  • Receive Date 12 July 2025
  • Revise Date 01 September 2025
  • Accept Date 20 September 2025