# V. 2D Portal Reactions 2

Find the maximum moment due to a uniform load on the horizontal member in a 1x1 bay plane frame.

## Reference

McCormac, J. C., Structural Analysis, Intext Educational Publishers, 3rd edition, 1975, page 383, example 22 - 5.

## Problem

Determine the maximum moment in the frame.

E and I same for all members.

L = 20 ft

w = 2 kips/ft

## Comparison

Table 1. Comparison of results
MMax (kipÂ·ft) 44.40 44.44 negligible

The file C:\Users\Public\Public Documents\STAAD.Pro CONNECT Edition\Samples\ Verification Models\03 Frames\2D Portal Reactions 2.STD is typically installed with the program.

``````STAAD PLANE : 2D PORTAL REACTIONS
START JOB INFORMATION
ENGINEER DATE 17-Sep-18
END JOB INFORMATION
*
*  REFERENCE 'STRUCTURAL ANALYSIS' BY JACK C. McCORMACK,
*  PAGE 383 EXAMPLE 22-5, PLANE FRAME WITH NO SIDESWAY
*  ANSWER - MAX BENDING = 44.4 FT-KIP
*
UNIT FEET KIP
JOINT COORDINATES
1 0 0 0; 2 0 20 0; 3 20 20 0; 4 20 0 0;
MEMBER INCIDENCES
1 1 2; 2 2 3; 3 3 4;
MEMBER PROPERTY AMERICAN
1 TO 3 PRIS AX 1 IZ 0.05
DEFINE MATERIAL START
ISOTROPIC MATERIAL1
E 4.132e+06
POISSON 0.3
END DEFINE MATERIAL
CONSTANTS
MATERIAL MATERIAL1 ALL
SUPPORTS
1 4 FIXED
2 UNI Y -2
PERFORM ANALYSIS
PRINT MEMBER FORCES
FINISH
``````

```   MEMBER END FORCES    STRUCTURE TYPE = PLANE