Special Reinforced Concrete Shear Wall Design Example

Special reinforced concrete structural walls are walls that have been proportioned and detailed to meet special code requirements.

Special reinforced concrete shear wall design example. Service load dead load at each floor and roof. Bending strengthof the section has been reduced by about 15 shear strengthat wall base has been reduced by about 14. 3 clear rather than the designed 2 clear. 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.

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. Shear strength reduced from 7654 lbs to 6589 lbs. Essential for stability check of reinforced concrete structure. The design and detailing requirements for special reinforced concrete shear walls have undergone significant changes from aci 318 11 to aci 318 14.

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. A reinforced concrete load bearing shear wall supporting for a four story building. 5 bars at 18 in. 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. On centers in each face a s vertical 5 18 in. Live load at each floor and roof. Special reinforced wall shear walls 87 example.

P l 25 kips. 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. Seismic design of special reinforced masonry shear walls. 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.

Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads. In this example design for 200 kips or 10 greater than 181 kips example. P d 40 kips. 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.

Strength reduced from 136 7 to 116 8 in kips. In reinforced concrete buildings the vertical elements are usually either moment resisting frames or structural walls sometimes referred to as shear walls. Wall length 18 ft vertical reinforcement. 3500 psi concrete 5 10.

The requirements of this section apply to special reinforced concrete structural walls serving as part of the earthquake force resisting system.