"MOVLOADS" is a spreadsheet program written in MS-Excel for the purpose of analysis of simple-span members subjected to from one (1) up to eight (8) moving wheel loads with up to seven (7) wheel spacings. Specifically, the maximum moment and location from the left end of the member and wheel postioning, the maximum end shears, the maximum deflection, and the maximum center support reaction for two (2) adjacent simple-span members are calculated.
This program is a workbook consisting of two (2) worksheets, described as follows:
Program Assumptions and Limitations:
1. The following references were used in the development of this program (see below):
a. "Modern Formulas for Statics and Dynamics, A Stress-and-Strain Approach" by Walter D. Pilkey and Pin Yu Chang, McGraw-Hill Book Company (1978), pages 11 to 21.
b. AISC 9th Edition Allowable Stress (ASD) Manual (1989), pages 2-298 and 2-310.
2. This program uses the three (3) following assumptions as a basis for analysis:
a. Beams must be of constant cross section (E and I are constant for entire span length).
b. Deflections must not significantly alter the geometry of the problem.
c. Stress must remain within the "elastic" region.
3. To determine the value of the maximum moment and location from the left end of the left span for either only one (1) or two (2) wheel loads, those values are calculated directly by formulas.
4. To determine the value of the maximum moment and location from the left end of the left span for three (3) up to eight (8) wheel loads, the group of wheel loads is positioned with wheel load P1 situated directly over the left support. Then the group is moved to the right in 1/200*span increments, and the left and right reactions as well as the moments under each of the wheel loads are calculated. In moving the group of wheel loads incrementally from left to right, any wheels that would drop off of the span are done so. Then this entire procedure is mirrored for the opposite direction, from right to left.
26 Nov 2019
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