API REPORT 84-54
Bending Capacity of Fabricated Pipe at Fixed Ends
|Publication Date:||1 December 1985|
The current test series is comprised of the eight cantilever specimens described in Table 1. Four different wall slendernesses are included by using three D/t ratios of 29, 48 and 72 with nominal yield strengths of 36 ksi and one size with D/t of 48 and a yield strength of 50 ksi.
The shear and moment gradient influences are studied by testing each slenderness in two lengths. A survey of platform designs by several members of the TAC revealed that the shear stress to bending stress ratios typically ranged from 0.01 to 0.16 with most at 0.04 to 0.08. The test lengths were chosen to produce shear stress to bending stress ratios of 0.046 and 0.080 with the former selected to restrict the specimen fabrication to two ten foot long cans. (Due to limits in equipment capacity, the test length was increased for one short specimen that had a higher yield strength than anticipated, resulting in a ratio of 0.067 rather than 0.08.) It can also be noted that data from the constant moment tests with corresponding slenderness provided a third length with a limiting ratio of zero.
The remainder of this report contains information on the fabrication of the test specimens, details of the test instrumentation and procedures, as well as a presentation of the test data for each of the eight tests. The conclusions are based on an evaluation of the results of these tests along with the relevant tests from the constant moment series.