Civil Engineering Reference
In-Depth Information
Figure 10.17
Finite element model of post-tensioned columns
10.5 Framed Shear Walls under Shake Table Excitations
Two low-rise shear walls with a height-to-width ratio of 0.5 were tested on a shake table
simulating seismic excitations at NCREE. Both specimens were designed with a scale factor
of 1:2 according to the capacity limit of the shake table, and both had the dimensions of 625 mm
in height, 1400 mm in length, and 60 mm in thickness. The two specimens were designed
identically, with the exception of the steel grid orientation in the walls. While one specimen
(STC) was designed as a conventional shear wall with the steel bars in the horizontal and
vertical directions (Figure 10.20a), the wall reinforcement in the other specimen (STN) was
oriented at 45
◦
to the horizontal (Figure 10.20b). The wall panels in both specimens were
designed with a 120
120 mm boundary column with four D16 bars (diameter 16 mm) as
the longitudinal steel. The walls in the specimens had a steel ratio of 0.5%. The concrete
compressive strength for the two specimens was 34.0 MPa. The yield stress and ultimate
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