Seismic performance of damage-protected beam-column joints Academic Article

abstract

• An experimental and computational study of an 80%-scale precast concrete three-dimensional (3D) beam-column joint subassembly designed with damage-protected rocking connections is presented. A prestress system is implemented whereby high-alloy, high-strength, unbonded threaded bars running through the beams are coupled to rods within the columns. The threaded bars are post-tensioned and supplemental energy dissipation devices are also installed. Both wet and dry joint solutions are considered. A multi-level seismic performance assessment (MSPA) is conducted considering three performance objectives related to immediate occupancy and collapse prevention. First, bidirectional quasistatic cyclic tests were conducted and the specimen's performance was characterized. This data was then used in a 3D nonlinear incremental dynamic analysis (IDA). Results ftom the IDA were used to select three critical earthquakes for further experimental bidirectional testing. Thus, quasi-earthquake displacement (QED) tests were performed. Results indicate the system satisfied all performance objectives related to serviceability and life safety. Further design improvements are discussed. Copyright 2008, American Concrete Institute. All rights reserved.

authors

• Mander, John

published proceedings

• ACI STRUCTURAL JOURNAL

author list (cited authors)

• Solberg, K., Dhakal, R. P., Bradley, B., Mander, J. B., & Li, L.

complete list of authors

• Solberg, Kevin||Dhakal, Rajesh P||Bradley, Brendon||Mander, John B||Li, Luoman

publication date

• March 2008

published in

• ACI Structural Journal  Journal

keywords

• Damage Avoidance Design
• Multi-level Seismic Performance Assessment
• Quasi-earthquake Displacement

start page

• 205

end page

• 214

volume

• 105

issue

• 2