Special Reinforced Concrete Shear Wall Design

Strength of reinforced concrete sections amount of rebar a s the project calls for 5 10 and 5 12 are used.

Special reinforced concrete shear wall design.

Seismic design of special reinforced masonry shear walls. Seismic design of cast in place concrete special structural walls and coupling beams. 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. The design process is illustrated with examples.

Both the design for overturning and the design for shear are explained. The design and detailing requirements for special reinforced concrete shear walls have undergone significant changes from aci 318 11 to aci 318 14. Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads. 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.

Strength reduced from 136 7 to 114 9 in kips. Similarly when designing special reinforced masonry shear walls by the allowable stress design method the shear and diagonal tension stresses resulting from in plane seismic forces are required to be increased by a factor of 1 5. 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. Reinforced concrete shear wall analysis and design.

The requirements of this section apply to special reinforced concrete structural walls serving as part of the earthquake force resisting system. A guide for practicing engineers the basic structural elements of an earthquake resistant building are diaphragms vertical framing elements and the foundation. 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. 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.

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. Each of these checks is intended to increase flexural ductility while decreasing the potential for brittle shear.