# FRAME (metric).xls

Rating:
19

### Description

"FRAME" --- PORTAL AND GABLE RIGID PLANE FRAME ANALYSIS
Program Description:
"FRAME" is a spreadsheet program written in MS-Excel for the purpose of plane frame analysis of portal and gable rigid plane frames subjected to various types of loading.  Specifically, the "stiffness matrix" method of analysis is used to determine the unknown joint displacements, support reactions, and member end forces.  Individual frame members are also analyzed to determine the shears and intermediate moments.  Plots of both the shear and moment diagrams are also produced.  Also, the frame is drawn for visual confimation of geometry/configuration.
Note: this is a metric units version, converted from the original "FRAME.xls" spreadsheet workbook.
This program is a workbook consisting of three (3) worksheets, described as follows:
Doc - This documentation sheet
Portal Frame - Portal rigid plane frame analysis
Gable Frame - Gable rigid plane frame analysis
Program Assumptions and Limitations:
1.   This program uses the "stiffness matrix" method of analysis and four (4) following basic analysis assumptions:
a.  Members must be of constant cross section (E and I are constant for entire length).
b.  Deflections must not significantly alter the geometry of the problem.
c.  Stress must remain within the "elastic" region.
d.  Since this analysis is "first-order", the effects of "P-D", "P-d", and shear deformation are not included.
(See below for the iterative, manual procedure to approximate the P-D effects in columns of a frame.)
(Significant effects due to shear deformation are limited to very short and deep members.)
2.   Additional assumptions and features are as follows:
a.  Frame support joints may each be either fixed or pinned.
b.  Frame support joints may be at different levels (elevations).
c.  Columns must be vertical (cannot be sloped).
c.  For a portal frame, the top (roof) member may be flat or sloped in either direction.
3.   A vertical load, horizontal load, and externally moment may be applied to any of the joints of the frame.  These joint loads are to be applied in "global" axes directions.  Note: Joint loads applied directly at supports are merely added directly to support reactions and are not reflected in member end force values.
5.   This program will calculate the member end reactions, the member end forces (axial, shear, and moment), the member maximum positive and negative moments (if applicable), and the joint displacements. The calculated values for the maximum moments are determined from dividing the member into fifty (50) equal segments with fifty-one (51) points, and including all of the point load and applied moment locations as well.  (Note: the actual point of maximum moment occurs where the shear = 0, or passes through zero.)
6.   The user is also given the ability to select an AISC W, S, C, MC, or HSS (rectangular tube) shape to aide in obtaining the required moment of inertia for input.  (This facility is located off to the right of the main page.)
7.  This program contains numerous “comment boxes” which contain a wide variety of information including explanations of input or output items, equations used, data tables, etc.  (Note:  presence of a “comment box” is denoted by a “red triangle” in the upper right-hand corner of a cell.  Merely move the mouse pointer to the  desired cell to view the contents of that particular "comment box".)

Calculation Reference
Structural Frames
Frame Design
Structural Steelwork

11 Oct 2016
11 Oct 2016
File Size:
3,882.50 Kb
358
File Version:
1.2
File Author:
Alex Tomanovich
Rating:
19