Unreinforced Concrete Wall Design

Minimum design load is 5 psf out of plane sds 0 5.

Unreinforced concrete wall design.

Wall weight is 36 psf and r 1 5 for unreinforced masonry. Basically you do an m s and the overall design thickness is taken as 2 less than actual thickness since it s cast against soil. Aci318 chapter 22 tells you how to design plain concrete footings. Load from slab is transferred as axial load to wall.

Section 14 4 walls designed as compression members appears to be the most appropriate method for this example. Determine if the wall is adequate. Reinforced wall flexure check fully grouted reinforced concrete masonry wall design and partial grouted concrete masonry wall with neutral axis in the face shell subjected to flexural stresses only for bending stress. Structural plain concrete is defined as either unreinforced or with less reinforcement than specified in the code for reinforced concrete section 2 1.

Composite wall structural design requirements are contained in building code requirements for masonry structures ref. 6 provides typical values for the net moment of inertia i n and cross sectional area a n for various wall sections if the value of the bending stress f b given by equation 1 is positive the masonry section is controlled by tension and the limiting values of table 1 must be satisfied. Reinforced concrete wall when reinforcement 0 4. Shear can be checked but should basically never control.

Check unreinforced concrete masonry wall design subjected to flexural stresses only for bending stress. Check load combination g 0 6d 0 7e. The seismic load is. Reinforced concrete wall is classified as.

The figure shows the bending moment and transverse loading distributions assumed in the design of such walls just like the case of unreinforced masonry the dom ino frame design by le corbusier during the early 20th century. Design is similar to a rc column breadth equal to thickness of wall and depth equal to 1m. Rcc wall is. Tek 14 1b section properties of concrete masonry walls ref.

4 and the international building code ref. Allowable stress design of unreinforced composite walls is typically governed by the flexural tensile capacity of the masonry system see table 1 although compression and shear. Shear design assume a 12 inch thick wall concrete shear strength. The self weight of the wall decreases wall capacity and walls with an eccentric vertical load.

Concrete strength al ൯ne for an 10 thick wall with 5 10 and 2 5 clear to strength steel will only reduce the nominal moment capacity of the secti對on from 136 68 to 135 66 inch kips 尩 if the concrete strength decreased from 3 5 to 3 0 ksi. Chapter 22 provides minimum requirements for design and construction of structural plain concrete members cast in place or precast. Plain concrete wall when reinforcement 0 4. When depth is large it is called rc wall.

Seismic design category c use the 2012 ibc required.