Cyclic Behavior of High-Strength Lightweight Concrete Exterior Beam-Column Connections Reinforced with GFRP

Using lightweight reinforced concrete beams with glass fiber bars (GFRP) is one approach for achieving the requirement seismic design idea of “strong-columns weak-beams”. Twelve full-scale normal-strength (NC fc` = 32 MPa) and high-strength (HSLWC 42, 49 52 exterior beam-column joints have been tested under cyclic loadings. The were conventional steel (CS) GFRP using fibers (SF). experimental joint shear force was compared that estimated by some international codes such as American Concrete Institute (ACI-19), Egyptian code (ECP-07), New Zealand Code (NZS-06). Nonlinear finite element analysis (ABAQUS) carried out. In present study, three main parameters explored (1) HSLWC, (2) ratios equal to 0.70%, 1.03% 1.37%, (3) SF 0.0%, 0.75% 1.50%. findings experiment revealed increasing strength from NC HSLWC (fc` 42 same ratio enhanced first cracking load about 25%. Increasing 1.50% failure 18–24% when non-fiber specimens. predicted equations ACI 318-19 ECP-07 are conservative connection but NZS-07 on borderline cases. program ABAQUS can be used successfully forecast behavior connections