Numerical Validation on Noval Replaceable Reduced Beam Section Connections for Moment-Resisting Frames

Abstract

After a severe seismic activation, the buildings designed based on seismic specifications are expected to have damages without any local and global collapse. The key parameters that influence re-occupancy of the damaged buildings are workmanship cost and time. In order to circumvent shortcomings of these crucial parameters, replaceable fuse members with high energy dissipation capacity have been developed up to date. Moment resisting frames (MRFs) are one of the most preferred lateral load resisting systems in terms of architectural versatility and high energy dissipation capacity. Even though many beam-to-column connection details have been investigated over the years, none of them has addressed assembly difficulties when replacing the damaged fuse members under the residual drift ratio occurred after an earthquake. Therefore, this study presents replaceable reduced beam sections with connection detail for MRFs under residual drift. The proposed detail includes end-plated mid-spliced reduced beam sections. Pursuant to this goal, the proposed detail has been investigated under cyclic loading protocol required by AISC 341-16 by using ABAQUS finite element program. Seismic response of the proposed connection detail was compared from PEEQ and Rupture Index standpoint. The obtained findings indicate that the proposed mid-spliced replaceable reduced beam section satisfies all requirements mandated by AISC 341-16.

Assessing Effectiveness of Shape Memory Alloys on the Response of Bolted T-Stub Connections Subjected to Cyclic Loading

“…Since fractures or cracks were not explicitly modeled, response indexes could be used to determine the potential level of fracture. There are several commonly used indexes to assess potential fracture, including the pressure index, the Mises index, the triaxiality index (TI), the equivalent plastic strain index (PEEQ), and the rupture index (RI) [107]. An accumulation of high RI values indicated the location of the most potential fracture [108].…”

“…Bozkurt et al [109][110][111] recommended using it to compare different configurations to determine the most likely to fracture. In many studies, researchers use the rupture index to evaluate the degree of damage to be experienced at beam-to-column connections [107,[112][113][114][115].…”

Numerical Study on Seismic Behavior of Demountable Joints Consisting of Reinforced Concrete Columns and Steel Beams

“…Lin et al [17] focused on the beam-column joint outrigger beam region connected to the main beam using replaceable damage control fuses; the experimental results show that the fuses not only control the joint damage in the region but also serve as indicators for evaluating the degree of damage that is visible after an earthquake. R-RBS beam end splice steel joints can avoid welding in the field; Özkılıç et al [18] carried out cyclic loading test and finite element analysis for this joint form, and the results show that this joint can meet the AISC code requirements.…”

Seismic Performance and Calculation Method of Precast Reduced Beam Section Connection

“…Zhang et al [21] proposed a high-strength steel framed-tube structure with replaceable link beams and performed low-cycle reciprocating loading tests on its substructures, showing that the damage under the action of an earthquake was concentrated in the energy-dissipation beam section, and the remaining main components were in the elastic phase. In recent years, Özkılıç et al [22][23][24][25][26][27][28][29][30] proposed various innovative connections to address the challenging issue of post-earthquake structural repair. An extensive series of experiments, FE analysis, and theoretical investigations were developed to study the load-bearing mechanisms of these novel connections.…”