Provisions chapter 4 presents design coefficients and system limitations for various seismic design categories.
Special reinforced concrete shear wall design example.
Bending strengthof the section has been reduced by about 15 shear strengthat wall base has been reduced by about 14.
Strength reduced from 136 7 to 116 8 in kips.
A reinforced concrete load bearing shear wall supporting for a four story building.
P d 40 kips.
Based on aci 18 10 4 1 nominal shear strength v n of structural walls is not to exceed vn acv c f c t fy where c is a coefficient defining the relative contribution of concrete.
Special reinforced wall shear walls 87 example.
In reinforced concrete buildings the vertical elements are usually either moment resisting frames or structural walls sometimes referred to as shear walls.
Wall thickness 10 in.
The requirements of this section apply to special reinforced concrete structural walls serving as part of the earthquake force resisting system.
On centers in each face a s vertical 5 18 in.
Special reinforced concrete structural walls are walls that have been proportioned and detailed to meet special code requirements.
Service load dead load at each floor and roof.
Ordinary special precast shear walls.
Shear in k in ksi in v a f d f d s s a v ns v y v y v v ns 33 1 54 0 0 5 0 5 0 31 60 192 0 5 use 5 bars in bond beams in psi k kips a f p.
Design of reinforced concrete load bearing shear wall.
Reinforced concrete mechanics and design 7th edition 2016 james wight pearson example 18 2 design data f c 4 000 psi normal weight concrete f y 60 000 psi slab thickness 7 in.
Special intermediate ordinary two possible seismic resisting systems using reinforced concrete are moment frames and shear walls.
Precast walls can be.
5 bars at 18 in.
3500 psi concrete 5 10.
Shear strength reduced from 7654 lbs to 6589 lbs.
A guide for practicing engineers nist gcr 14 917 31 prepared by the applied technology council for the national institute of standards and technology gaithersburg md.
Special r c shear walls.
P l 25 kips.
In this example design for 200 kips or 10 greater than 181 kips example.
Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads.
Seismic design of special reinforced masonry shear walls.
The design and detailing requirements for special reinforced concrete shear walls have undergone significant changes from aci 318 11 to aci 318 14.
Reinforced concrete shear wall analysis and design.
Aci 318 05 design data.
A structural reinforced concrete shear wall in a 5 story building provides lateral and gravity load resistance for the applied load as shown in the figure below.
The changes are a result of the unsatisfactory performance of many shear walls in the chile earthquake of 2010 and the christchurch new zealand earthquake of 2011.
