![]() In the "Uniaxial" and "Biaxial" worksheets, for cases with axial load only (compression or tension) and no moment(s) the program calculates total reinforcing area as follows:Īst = (Ntb*Abt) + (Nsb*Abs), where: Abt and Abs = area of one top/bottom and side bar respectively.ġ0. In the "Uniaxial" and "Biaxial" worksheets, this program assumes a "short", non-slender rectangular column with symmetrically arranged and sized bars.ĩ. In the "Uniaxial" and "Biaxial" worksheets, the CRSI "Universal Column Formulas", which are used by this program, assume the use of the reinforcing yield strength, fy =60 ksi.Ĩ. In the "Uniaxial" and "Biaxial" worksheets, the CRSI "Universal Column Formulas" are used by this program to determine points #1 through #7 of the 10 point interaction curve.ħ. ![]() In the "Flexure(Mn)", "Uniaxial", and "Biaxial" worksheets, when the calculated distance to the neutral axis, 'c', is less than the distance to the reinforcement nearest the compression face, the program will ignore that reinforcing and calculate the ultimate moment capacity based on an assumed singly-reinforced section.Ħ. ![]() In the "Flexure(As)" worksheet for a singly reinforced beam/section, when the required flexural reinforcing is less than the Code minimum, then the program will use the lesser value of either 4/3 times the required value or the minimum value as the amount to actually use for design.ĥ. Then a doubly-reinforced design is performed.Ĥ. In the "Flexure(As)" worksheet, the program will display a message if compression reinforcing is required, when the beam/section cannot handle the ultimate design moment with tension reinforcing only. Thus, any items below pertaining to any of the similar individual worksheets included in this one are also applicable here.ģ. This includes member flexural moment capacity, as well as shear, crack control, and inertia calculations. The "Complete Analysis" worksheet combines the analyses performed by four (4) of the individual worksheets all into one. This program follows the procedures and guidelines of the ACI 318-99 Building Code.Ģ. Uniaxial - Combined uniaxial flexure and axial loadīiaxial - Combined biaxial flexure and axial loadġ. Inertia - Moments of inertia of singly or doubly reinforced beams/sections This program is a workbook consisting of eleven (11) worksheets, described as follows:Ĭomplete Analysis - Beam flexure, shear, crack control, and inertiaįlexure(As) - Flexural reinforcing for singly or doubly reinforced beams/sectionsįlexure(Mn) - Ultimate moment capacity of singly or doubly reinforced beams/sectionsĬrack Control - Crack control - distribution of flexural reinforcing Specifically, the required flexural reinforcing, ultimate moment capacity, bar spacing for crack control, moments of inertia for deflection, beam shear and torsion requirements, and member capacity for flexure (uniaxial and biaxial) with axial load are calculated. Integrating curvatures over beam length, the deflection, at some point along x-axis, should also be reversely proportional to I."RECTBEAM" is a spreadsheet program written in MS-Excel for the purpose of analysis/design of rectangular beam or column sections. Therefore, it can be seen from the former equation, that when a certain bending moment M is applied to a beam cross-section, the developed curvature is reversely proportional to the moment of inertia I. Making similar considerations, the moment of inertia of the angle, relative to axis y0 is:
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