Long-Term Cyclic Performance Assessment of Micropile Systems ...

Test ScheduleTest Number Designation Applied Displacement Rate Cyclic Displacement Rate Frequency Rate Q Peak q p Peak f s Peak δ max δ e δ p q p,res f s,res(mm/min) (mm/cycle) (cycle/min) (kN) (MPa) (kPa) (mm) (mm) (mm) (MPa) (kPa)1 MDRC-0 1 na na 5.06 6.85 68.37 5.13 4.64 4.64 0.88 -0.442 MDRC-1 1 na na 4.38 6.26 60.96 59.80 59.80 59.80 1.13 -1.863 MDRC-1b 1 na na 4.34 6.58 43.06 24.92 24.92 24.92 0.90 -2.484 MDRC-1c 1 na na 4.59 6.31 62.52 24.90 24.90 24.90 0.89 -1.765 MDRC-3 0.2 na na 4.14 5.22 54.22 24.91 24.91 24.91 0.75 -0.486 MDRC-3a 0.2 na na 5.01 5.98 73.07 19.93 19.93 19.93 0.69 -1.547 MDRC-3b 0.2 na na 4.38 5.45 66.03 19.92 19.92 19.92 1.03 -0.638 CDRC-1 1 0.2 5 4.84 4.84 75.91 3.58 3.23 3.23 0.57 0.619 CDRC-2 0.25 0.05 5 4.61 4.01 86.43 2.49 2.23 2.23 0.56 1.1810 CDRC-3 0.02 0.004 5 3.40 3.13 0.96 0.78 0.78 0.5911 FDRC-1 1 1 1 4.69 5.82 67.10 10.98 10.63 10.6312 FDRC-2 1 0.1 10 4.21 4.50 57.57 9.99 9.72 9.72 0.13 0.1813 FDRC-2a 1 0.1 10 1.10 1.1014 FDRC-3 1 0.02 50 3.56 3.89 56.47 10.86 10.66 10.6615 FDRC-4 1 0.004 250 2.55 2.88 54.95 1.07 0.94 0.94 0.83 0.8316 FDRC-4a 1 0.004 250 1.20 1.2017 FDRC-5 1 0.002 500 2.29 2.92 55.34 1.02 0.83 0.83 0.79 0.7918 FDRC-6 1 0.001 1000 2.04 2.79 51.74 1.00 1.00 1.00 0.22 0.2219 FDRC-8 1 0.0004 2500 1.87 2.64 47.63 0.53 0.45 0.4520 FLC-1 1 na na 3.17 4.21 45.07 17.47 17.29 17.2921 FLC-2 1 na na 1.82 3.05 52.22 0.77 0.67 0.67Testing Summary1. Monotonic displacement rate control – Effect of rate2. Cyclic displacement rate control – Effect of frequency3. Cyclic load control – Validation of testing methodology & modelEstablishment of Critical Cyclic Load