Report - PEER - University of California, Berkeley

tested by Meinheit and Jirsa are used; sufficient data are provided for thisspecimen.• Pessiki et al. (1990) investigated the earthquake response of older buildingcomponents. Data from seven (P2-P5, P7-P9) of the test specimens are used.• Joh et al. (1991a, 1991b) investigated the impact on earthquake response of1) joint transverse reinforcement, 2) beam transverse reinforcement and 3)torsion due to beam eccentricity. Three specimens from these studies (JXO-B8, JXO-B1, and JXO-B2) are used.• Walker (2001) and Alire (2002): evaluated the impact of joint shear stressand load history. These studies conclude that joints maintain strength andadequate stiffness when drift demand less than 1.5% and shear stress demandis less than 10√f’ c. Data from all of the specimens (PEER*, CD*, PADH*)are used.Design details and loading data for these specimens are listed in Table 2.SpecimenTable 2. Design details and load data for experimental test specimensf'c(psi)ShearStressDemand/ f'cShear StressDemand/ sqrt(f'c)(psi)TransverseSteelVolumeRatio (%)MaximumBondIndex, µColumnAxial Load/ f'cAgDriftHistory*ColumnSpliceAboveJointRatio ofBeam toColumnWidthPEER14 4606 0.16 10.9 0.00 18.7 0.11 Standard no 1.00PEER22 5570 0.20 14.6 0.00 24.9 0.09 Standard no 1.00CD1514 4322 0.18 11.6 0.00 19.3 0.12 High-cyc. no 1.00CD3014 6171 0.14 11.3 0.00 16.1 0.08 High-cyc. no 1.00CD3022 5533 0.21 15.5 0.00 25.0 0.09 High-cyc. no 1.00PADH14 6218 0.15 11.7 0.00 16.1 0.08 Unsym. no 1.00PADH22 5259 0.22 15.7 0.00 25.6 0.10 Unsym. no 1.00PEER09 9500 0.13 12.6 0.00 16.7 0.10 Standard no 1.00PEER15 9500 0.19 18.7 0.00 26.7 0.10 Standard no 1.00PEER41 5000 0.17 12.2 0.00 29.6 0.10 Standard no 1.00P2 5000 0.19 13.2 0.00 34.8 0.27 Standard yes 0.88P3 4000 0.21 13.2 0.00 34.6 0.34 Standard yes 0.88P4 4000 0.20 12.7 0.00 34.6 0.34 Standard yes 0.88P5 4000 0.22 13.6 0.23 38.0 0.34 Standard yes 0.88P7 3000 0.19 10.5 0.00 52.5 0.46 Standard yes 0.88P8 3000 0.19 10.3 0.00 39.4 0.46 Standard yes 0.88P9 4000 0.15 9.60 0.00 39.5 0.10 Standard yes 0.88MII 6060 0.25 19.7 0.44 25.1 0.25 Standard no 0.85JXO-B1 3901 0.12 7.51 0.27 19.9 0.17 Standard no 0.67JXO-B2 3269 0.24 13.8 0.27 19.9 0.17 Standard no 0.50JXO-B8 3429 0.19 11.1 0.27 19.5 0.15 Standard no 0.93Min. 3000 0.12 7.5 0.00 16.1 0.08 0.50Max. 9500 0.25 19.7 0.44 52.5 0.46 1.00C.O.V. 0.36 0.19 0.22 1.90 0.36 0.67 0.14Note: A standard drift history comprises 1–3 cycles to increasing maximum drift demands, a high-cyclehistory comprises 10 or more cycles to increasing maximum drift demands, and an unsymmetrical historycomprises multiple cycles to varying maximum and minimum drift demands.212