Special Reinforced Concrete Shear Wall Design

A guide for practicing engineers the primary seismic force resisting elements in buildings are horizontal diaphragms vertical framing elements and foundations.

Special reinforced concrete shear wall design. Nist technical brief no. What is the difference in detailing for intermediate precast shear walls ipsw vs special reinforced concrete walls srcw made from precast elements. 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 and detailing requirements for special reinforced concrete shear walls have undergone significant changes from aci 318 11 to aci 318 14.

Two weeks ago i had the chance to present to the young members group of the structural engineering association of metro washington on the topic of multi story light frame shear wall design with all of the large firms in the d c. 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 to wall strength given as follows. Be familiar with the special reinforced masonry shear wall design process 2. Be alert to unique issues that make design of special reinforced masonry shear walls different from other.

Reinforced concrete shear wall analysis and design. Together these elements comprise the seismic force resisting system sfrs. Strength reduced from 136 7 to 114 9 in kips. The requirements of this section apply to special reinforced concrete structural walls serving as part of the earthquake force resisting system.

Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads. Area it wasn t a big surprise to find out that only about one third of the group had experience with light frame shear wall design. 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. Shear wall section and assumed reinforcement is investigated after analysis to verify suitability for the applied loads.

Special reinforced concrete structural walls are walls that have been proportioned and detailed to meet special code requirements for resisting combinations of shear moment and axial force that result as a building sways through multiple displacement cycles during strong earthquake ground shaking. A guide for practicing engineers learning objectives participants will 1. Strength of reinforced concrete sections amount of rebar a s the project calls for 5 10 and 5 12 are used. Seismic design of special reinforced masonry shear walls.

C 0 80 for hw. Seismic design of special reinforced masonry shear walls. 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. Specifically is monolithic emulation required for ipsw or is that the difference between the two systems.