Special Reinforced Concrete Shear Wall Design Example

Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads.

Special reinforced concrete shear wall design example.

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. P l 25 kips. Design of reinforced concrete load bearing shear wall. Live load at each floor and roof.

3500 psi concrete 5 10. 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. Strength reduced from 136 7 to 116 8 in kips. 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. P d 40 kips. Shear strength reduced from 7654 lbs to 6589 lbs. On centers in each face a s vertical 5 18 in.

Wall thickness 10 in. Special reinforced wall shear walls 87 example. The requirements of this section apply to special reinforced concrete structural walls serving as part of the earthquake force resisting system. Bending strengthof the section has been reduced by about 15 shear strengthat wall base has been reduced by about 14.

In this example design for 200 kips or 10 greater than 181 kips example. 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. A reinforced concrete load bearing shear wall supporting for a four story building. 3 clear rather than the designed 2 clear.

Reinforced concrete shear wall analysis and design. In reinforced concrete buildings the vertical elements are usually either moment resisting frames or structural walls sometimes referred to as shear walls. If you spend hours calculating and then recalculating wall stiffnesses kr2 direct and torsional rotation component of force to then calculate reinforcement and concrete stresses for each wall in turn then this spreadsheet will reduce your design time to as little as. 5 bars at 18 in.

Wall length 18 ft vertical reinforcement. Aci 318 05 design data. Special reinforced concrete structural walls are walls that have been proportioned and detailed to meet special code requirements. 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.

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.