The programs in this section provide analysis and design for structural elements made of concrete unit masonry.

 

 

Code References

 

Program modules for MASONRY design are designed to be in conformance with the ACI 530-02 Edition. Masonry design is performed using "Allowable Stress Design" analysis & design procedures using factored loads and reduced allowable capacities. Exception : The module titled "Slender Masonry Wall Design" uses an ultimate strength P-Delta analysis.

 

Masonry design procedures in these modules follow the following code requirements:

 

 

 

 

Masonry Wall

Masonry Wall uses non P-Delta working stress design procedures. UBC load combination equations of dead, live, and short term loads at top and mid-height are used to determine adequacy. Items considered include special inspection, solid grouting, eccentric loads, rebar location, and parapet loads.

 

Slender Masonry Wall Design

Slender Masonry Wall Design provides design analysis according to 1994 UBC section 2108.2.4 which considers P-Delta effects on total moment and wall deflection, and uses ultimate strength concepts. Added lateral point and distributed loads may be applied to model jambs at openings. Special inspection, rebar location, seismic factors, wind loads, spacing of grouted cells, and eccentric/concentric vertical loads can be modified and included in analysis. The program iterates until deflection convergence is reached for both service and factored load cases.

 

Masonry Column Design

Masonry Column Design gives design calculations for masonry columns which may or may not be built within a wall. For conditions where a wall does exist, the column analysis can include the effect of tributary lateral wind or seismic loads. A single axial dead and live load with eccentricity is applied to the top. Allowable bending and axial stress is calculated using MIA equations, and combined stress results are given for all combinations.

 

Flush Wall Masonry Column

Flush Wall Masonry Column is similar to the Masonry Column program, except this column is contained entirely within the wall thickness. Axial loads and lateral loads due to wind and seismic forces are included in the analysis. An assumed width based upon bearing length plus four times column thickness is used unless modified. Allowable bending and axial stress is calculated using MIA equations, and interaction equation results are given for four combination conditions.

 

Masonry Shear Pier Analysis

Masonry Shear Pier Analysis can analyze force distribution between collinear shear elements in walls based upon their relative rigidities. Each pier may have a fixed or pinned end, have differing height, length, and thickness, and be of different construction types. Based upon these parameters, a single lateral load is distributed between the piers and required shear and bending reinforcement is given.

 

Masonry Lintel Design

Masonry Lintel Design allows vertical, lateral, and perpendicular loads, flexible rebar locations, and fixed or pinned end conditions.