The behavior of PBPD frame is quite stable, and drift is considerably less as compared with the baseline frame.
On the other hand, in 6 story baseline frame, the maximum value of interstory drift ratio in Borrego record is 5.1 % in baseline frame, but in PBPD frame, it is 2.12 % in Imperial record.
Open image in new window Fig. 7 Story drift time histories for both 6-story PBPD frame and baseline frame (the Loma record) baseline frame PBPDframe.
Figure 9 shows the residual drift ratio of baseline frame and PBPD frame under eleven records.
In 9-story frame, the maximum value of interstory drift in baseline frame is 5.62 % in Borrego record but in PBPD frame, it is 2.6 % in Borrego record.
Figure 10 shows the formation of plastic hinges in 9 story baseline frame and PBPD frame under Loma record.
a PBPD frame, b baseline frame.
As noted earlier, this time frame is too long, likely allowing for the development of a metabolic syndrome during the ensuing time between the "baseline" MetMon and the index date.
On the other hand, in baseline frames they exceed the target value.
Moreover, there is no distinction between the laboratory reference frame and the lattice reference frame because both frames are associated with the same fixed crystalline sublattice.
