Pyramid Structural Engineering Applications By Dr.Daoud Jabaji

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RC section flexural analysis and design.
RC section design for shear and torsion Flexural crack width calculation.
Punching Shear design
Design of corbels
Design of freestanding stairs
Design of helical stairs
Design of two-way slabs
Design of cantilevers and simply supported beams Analysis and design of one-way and ribbed slabs Analysis and design of continuous beams and sub-frames subjected to uniform, triangular and concentrated loads Flat slab design by the equivalent frame method
Design of single story or multi-story short or slender columns of rectangular, circular or irregular section under axial load and uniaxial or biaxial bending
Centroidal and offset pad footings. Adjacent column footings. Combined footings Wall footings
Retaining Walls
Gravity walls.
Sloped cantilever walls. Stepped cantilever walls.
Boundary walls.
Pyramid is a collection of structural engineering computer applications under Windows for the analysis and design of reinforced concrete framings and elements. It has been under continuous development by the author during the past 30 years for use in his design work and is now being made available to all free of charge. The applications comply with 4 codes at the present. They include simple calculations like the design of reinforced concrete sections subjected to flexure, shear and torsion; crack width determination; punching shear; free standing and helical stairs; and two way slabs. The applications also include more complex computations like beams and sub-frames of variable sections subjected to uniform, triangular and concentrated loads; columns of rectangular, circular and irregular sections subjected to biaxial bending; pad footings of various configurations; and earth retaining walls. The interface is user friendly and the calculations are interactive, permitting the user to explore design alternatives with relative ease.

The author has been a structural designer for more than 40 years and has been continuously developing computer programs to reduce calculation effort. With retirement approaching, these programs in their refined form are being made available to all free of charge under the name Pyramid. Powerful structural engineering software now exists where applications like ETABS and Robot can be employed to model a complete building in all its components and analyze the building under both gravity and lateral loading including P-delta effects and construction sequence. Pyramid cannot be compared to such applications. It can only model individual framings and only for gravity loading. Nonetheless Pyramid remains relevant. Its strength lies in its simplicity and user friendly interface. A structural designer is often faced with simple or small scale calculation needs which do not justify recourse to a super program. Furthermore, although designing a building for lateral loading can only be performed using a super program, Pyramid can be used for preliminary sizing of members and for design verification. Creating a complete building model requires a huge volume of data, is time consuming and not easy to perfect. Using a super program to size members can be an exasperating task. Furthermore the volume of data required for a complete building model permits a higher possibility for human error, requiring design verification by alternative means. In addition to the design of beams, slabs and columns, Pyramid tackles the design of simple members which are not addressed by today's super programs. These include corbels, freestanding stairs, irregular column sections, column pads, combined and adjacent footings and retaining walls. The author is aware of one commercial program which is similar to Pyramid. The name of the program is PROKON. In fact Pyramid was checked against PROKON as well as against ETABS and SAP2000. It is the author's opinion that the interface of Pyramid is more user friendly and can serve as an effective calculation tool for structural engineers everywhere. The Codes covered by Pyramid at the present are ACI318-11, BS8110-97, Jordan JBC5-08 and Saudi SBS304. Planned future developments include the addition of the Eurocode and other Arab codes as they become available.

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The Pyramid setup is a free installer obtained from

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