Assessment of the Effect of Redundancy Factor for Seismic Performance of Moment Resisting Reinforced Concrete Buildings
Assessment of the Effect of Redundancy Factor for Seismic Performance of Moment Resisting Reinforced Concrete Buildings
Elham kalatearabi1
1) Master student, Civil Engineering, Structural Orientation, Sajjad University of Mashhad, Mashhad,
Publication :
2 nd Scientific Research Conference on Urbanism, Civilization, Architecture and Environment Monaco(ucaeconf.com)
Abstract :
The redundancy factor is applied to increase the redundancy of structures
that not had a sufficient degree of static indeterminacy in many
international standards. The redundancy factor is different in the design
standards. In the fourth edition of the standard No. 2800, the redundancy
factor is proposed to improve the seismic performance of buildings that
are considered with two values 1 and 1.2. Therefore, the base shear can
be increased to a maximum of 20%, according to the standard No. 2800.
In this paper, the effect of the redundancy factor on the seismic
performance of the moment resisting concrete structures is investigated
using nonlinear static analysis. Also, the numerical evaluation of the value
provided by the standard No. 2800 for the redundancy factor is assessed.
The studied models have 4, 6 and 8 stories with a story height h=3.2 m
where 1, 2, 3 or 4 bays have to be located. ETABS software used for
modeling and analysis. Then, the performance of the structures is
evaluated by applying once a redundancy factor 1 and again the
redundancy factor 1.2. Based on the results of this research, it can be
concluded that it is justified to account directly structural redundancy in
the design by using a redundancy factor, as proposed in some
international building codes.
Keywords :
Nonlinear analysis
Redundancy factor
Seismic performance
Moment resisting frames
Standard No.