SEISMIC PERFORMANCE OF FULL-SCALE HIGH-PERFORMANCE FIBER-REINFORCED (HPFRC) SPECIAL MOMENT FRAME SLABBEAM- COLUMN SUBASSEMBLAGE USING JOINTS AS THE MAJOR ENERGY DISSIPATION SOURCE

Author(s): Y.-J. Choi and S.-H. Chao
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 409-416
Total Pages: 8
Language: English

Abstract: This paper presents a study on the seismic performance of reinforced concrete (RC) perimeter special moment frames (SMFs) which have high-performance fiber-reinforced concrete (HPFRC) in beam plastic hinge and joint regions. This research mainly focused on evaluating the feasibility of utilizing the HPFRC joints as major sources of energy dissipation. A full-scale HPFRC slab-beam-column (SBC) subassemblage with a weak joint was tested under large displacement reversals. This specimen eliminated the majority of steel hoops and ties in the beam plastic hinge and joint regions. A counterpart specimen made of conventional concrete was designed based on ACI 318-11 and tested under the same loading protocol. Both specimens showed stable hysteretic responses up to 3.5% column drift ratio without significant strength degradation, which meets collapse prevention structural performance according to ACI committee 374 (ACI 374 Committee, 2013). The response of the HPFRC specimen was controlled by joint shear mechanism, whereas the conventional RC specimen responded in a flexure mode forming plastic hinges at the end of the beams. This paper also compares the seismic performance of the HPFRC specimen with that of the conventional RC specimen by delineating the lateral force versus column drift ratio, damage state, joint distortion, and dissipated energy.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00