Special Reinforced Concrete Shear Wall Design Example

A reinforced concrete load bearing shear wall supporting for a four story building.

Special reinforced concrete shear wall design example.

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. Strength reduced from 136 7 to 114 9 in kips. 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.

Precast walls can be. 2 5 clear to strength steel 5 12 rather than the designed 5 10 bending strength of the section has been reduced by about 16. The prescriptive seismic detailing requirements for each of three reinforced masonry shear walls types ordinary intermediate and special are explained with particular attention to special reinforced shear walls. Reinforced concrete shear wall analysis and design.

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. Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads. P d 40 kips. Ordinary special precast shear walls.

Both the design for overturning and the design for shear are explained. 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 intermediate ordinary two possible seismic resisting systems using reinforced concrete are moment frames and shear walls. A guide for practicing engineers the basic structural elements of an earthquake resistant building are diaphragms vertical framing elements and the foundation.

Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads. In reinforced concrete buildings the vertical elements are usually either moment resisting frames or. Strength of reinforced concrete sections amount of rebar a s the project calls for 5 10 and 5 12 are used. Provisions chapter 4 presents design coefficients and system limitations for various seismic design categories.

Service load dead load at each floor and roof. Special r c shear walls. Live load at each floor and roof. Seismic design of cast in place concrete special structural walls and coupling beams.

The design process is illustrated with examples. Seismic design of special reinforced masonry shear walls. P l 25 kips. Design of reinforced concrete load bearing shear wall.