Seismic rehabilitation of bolted end plate connections using post-tensioned tendons

Bolt Pre-tension Effect on Performance of Bolted Extended End-plate Moment Connections under Cyclic Loading

“…In this paper, the ABAQUS finite element program was used to numerically model the bolted extended end-plate moment connection. To verify the results of the program, one of the experimental bolted connections, studied by Saberi et al [16], was numerically modeled. Experimental and numerical results will be compared to investigate the verification of numerical results of bolted connections, modeled using ABAQUS.…”

“…The connection test model was used as an experimental study conducted by Saberi et al [16] called (EP-R) for verification. The specimen represents a corner connection according to the substructure proposed in FEMA350 [17].…”

Seismic behavior of frames with weak bolted end plate connections rehabilitated by posttensioned tendons under near‐/far‐field earthquakes

“…Since the analytical study in this part is about the cyclic behavior of bolted connections with weak end plate retrofitted by posttensioned tendons, the accuracy of modeling is verified by comparing the finite element model results with the experimental test results of two specimens, EP‐R and EP‐WP‐T15‐H18, which were tested by the author et al (2016) under SAC cyclic load. Then, a 3D numerical model is developed, and by altering the retrofit parameters, the cyclic behavior of connection is evaluated including moment capacity, initial stiffness, energy absorption, and failure modes.…”

“…Since the analytical study in this part is about the cyclic behavior of bolted connections with weak end plate retrofitted by posttensioned tendons, the accuracy of modeling is verified by comparing the finite element model results with the experimental test results of two specimens, EP-R and F I G U R E 2 Geometrical details of the experimental specimens [20] , numerical meshed models, and applied retrofit method in the frame F I G U R E 2 (Continued) F I G U R E 3 FEMA/SAC2000 loading protocol in accordance with FEMA350 [21] T A B L E 1 Material properties used in FE modeling [23] under SAC cyclic load. Then, a 3D numerical model is developed, and by altering the retrofit parameters, the cyclic behavior of connection is evaluated including moment capacity, initial stiffness, energy absorption, and failure modes.…”

Multi-stage Performance Upgrade of Steel Moment Frames by Post-tension Connections

“…Applying such systems was examined by researchers in concrete structures [1][2][3] and then by those specilized in steel ones [4][5][6], all of whom reported a decrease in permanent drifs by utlizing the system. Additionally, *Corresponding Author Institutional Email: mgerami@semnan.ac.ir (M. Gerami) some studies focued on the effect of the changes in each of the effective parameters in such connections [7,8], and some others highlihted the effect of such systems on retrofitting weak connections, as well as seismic sequencing [9,10].…”