Accession Number:

AD0617718

Title:

STATIC AND DYNAMIC BEHAVIOR OF FIXED-BASE PORTAL FRAMES.

Descriptive Note:

Final technical rept. for May-Dec 61,

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF

Report Date:

1965-06-01

Pagination or Media Count:

149.0

Abstract:

Four steel portal frames, 8 feet high and 12 feet long, fabricated from 10B17 rolled sections, were tested under uniformly distributed static and dynamic loads. The loads were applied to one column of each frame to simulate a horizontal, traveling blast wave. The frames were partially restrained at their bases. Maximum static and dynamic loads of 92,000 and 91,000 pounds, respectively, were applied over one column of each frame. The rise times of the dynamic loads were approximately 2 to 3 milliseconds, and the loads decayed exponentially to zero in about 1 second. An equivalent triangular load-time function was used for analysis. Multiple-mode and simplified methods of dynamic analysis were performed. The simplified analysis adequately described the maximum displacement the multiple-mode analysis was found necessary to determine the locations of maximum moment and either method quite accurately predicted the response of the frames. Good correlation was obtained between theoretical and experimental values. The dynamic response factor was approximately 2.13, which was slightly larger than the theoretical value of 2.00. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE