Models for Simulating the Seismic Response of Concrete Structures - Dynamic Behavior of Concrete and Seismic Engineering - page 253

case during the tests. We should note that the damage mode with conventional linear
calculations is hardly ever predictable.
Figure 7.14. Test-calculation comparison for the unfilled structure
and the 475 sequence period earthquake
Within the frame of para-seismic regulations, the justification of that structure
with elastic calculation would involve using behavior coefficients respectively of 2.9
and 4.3 for earthquakes with 475 sequence periods (peak ground acceleration equal
to 2.18 m/s 2 ) and 975 year sequence periods (peak ground acceleration equal to 2.88
m/s 2 ). For the first earthquake level, the steel must have plasticized but no damage
could be observed. The 975 year sequence period test was stopped as initial crush
had started on the second floor, and the structure had to be reinforced before being
submitted to a further series of tests.
7.4.2. Semi-global and local models applied to concrete walls
Reinforced structure walls are quite widely used in France. Recent research has
allowed us to work out their para-seismic efficiency better. We will deal below with
work related to two specific studies: