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

• Analytical study on a type of column base connection: Exposed Base Plate with Extended Anchor Bolts. Excellent behavior in recent major earthquakes (e.g., 2010 Chile earthquake) Plastic deformations occur only at the anchor bolts, and all other components connection (including column) remain elastic. Flag-shape, self-centering hysteretic behavior. A rational design methodology is proposed validated. This paper investigates ductile detail exposed plates. consists plate anchored to concrete foundation through bolts extended steel chair configuration. The intention concentrate plastic strains mainly region forcing scientific background this research series sophisticated nonlinear finite element models subjected cyclic load protocol presence an axial compressive force. were validated against experimental test reported literature. Forces within components, stresses, strain distributions, deformation modes examined. total sixteen three-dimensional created using ABAQUS simulation platform. separated into two groups: first dimensions similar specimens tested programs past, while second group simulates connections representative mid-rise industrial frames. Building insights gained from simulations group, these connections. suggested simulations. Results indicate that studied configuration presents some advantages compared traditional presented Design Guide 1. For instance, are developed almost exclusively rods, no damage expected remaining components. Another essential characteristic stretch length, which it possible achieve target rotation without significant concentrations rods. facilitates post-earthquake inspections repairs, virtually eliminated story.