Abstract:
Reinforced concrete structural walls are widely used in design of the lateral load resisting
systems. Reinforced concrete structural walls allowed to economic and architectural designs in
accordance with directions in especially multistory reinforced concrete building systems.
Design shear forces are assumed to be proportional to the design base moment in the traditional
design of structural walls that are based on forced based methods. However, studies reveal that
considerable wall shear forces develop during nonlinear response due to higher mode effects
that are not predicted by the force based design methods. This situation can lead to significant
errors in the design. In this study, in order to prevent errors, dynamic shear force amplification
factor had been studied to obtain by using real seismic accelerations.
In this parametric study, 4,8 and 16 story typical wall buildings were designed for covering
strength reduction factors of R=2,4,6,8 and 10 using Mode Superposition Method that forcebased
method. Designs were taken into consideration 1st earthquake area and Z3 local site
class in Turkish Seismic Design Code (2007). Designed walls were analyzed with nonlinear
time history analyses and the dynamic shear force amplification factor () were obtained from
the base shear forces were proportioned the design base shear forces. As a result, relations
among strength reduction factor (R), first mode period and dynamic shear amplification factor
() were determined.
