Development of a simplified analytical procedure for determining the inelastic response of piping systems. Summary report

Evaluations of the Piping System Inelastic Analysis Computer Program PIRAX2

“…Equation (8). Agreement is deemerl to be very gJod even though, at the maximt~m load of 5145 lb, the strain gages indicated about* 0.045 to 0.048 percent whereas Equation (8) gives 0.065 percent at that load.…”

“…l(a)]. e = 2.931 X 10-7 F + 1.322 x l0-57 F 14 · 705 (8) Figure 6(a) shows comparisons of. measured* strains and those calculated by.…”

“…The details of the model of the three-anchor piping system are shown in Figure 32. The branch (Nodes 2, 3, 5, 7) was made smaller than th~· run (Nodes 1, 2, 4, 6,8,9) and elbows were included so that, quoting from -3138 of Code Case 1592, "a small portion of the structure undergoes inelastic strains while th~ major portion of the structt·ral system behaves in an elastic manner ••• In these cases, certain areas may be subjected to strain concentrations due to the elastic follow-up of the rest of the connected structure. "…”