Description: Non-Linear AutoPIPE vs Caesar Guide Explained Product: AutoPIPE Version number: V8i (v9.5) Submitted by: MU Revision: 0.2

Table of Contents

Description: Non-Linear AutoPIPE vs Caesar Guide Explained ..................................... 1 Product: AutoPIPE ................................................................................................ 1 Version number: V8i (v9.5) ................................................................................... 1 Submitted by: MU ................................................................................................ 1 Revision: 0.2 ....................................................................................................... 1 

Table of Contents .............................................................................................. 1 Real-World Guide Supports ................................................................................. 2 

Typical Guide Supports .................................................................................... 2 AutoPIPE Guide .............................................................................................. 2 Real-World Guide Movement Explained .............................................................. 3 Caesar Guide Movement Explained .................................................................... 3 Friction.......................................................................................................... 4 Conclusion ..................................................................................................... 4 Friction Calculation ......................................................................................... 4 Friction Calculation ......................................................................................... 5 Friction.......................................................................................................... 5 Conclusion: .................................................................................................... 5 Caesar II ....................................................................................................... 7 Caesar Output Results: .................................................................................... 8 

AutoPIPE vs Caesar Guide Summary ....................................................................... 9 Conclusion: .................................................................................................... 9 

Real-World Guide Supports Typical Guide Supports

AutoPIPE Guide All four bearing surfaces behave as integral but with independent bearing springs upward and laterally

V-Stop + Guide (large vertical gaps) or horizontal and vertical inclined

AutoPIPE Guide AutoPIPE Guide

AutoPIPE Guide AutoPIPE Guide

Real-World Guide Movement Explained Friction calculated on the vertical bearing spring is 10mm lateral movement i.e. gap. This is a more typical real-world guide. Caesar Guide Movement Explained e.g. Caesar +Y (with friction) and Z guide (10mm gap both sides) Friction incorrectly calculated on the vertical support based on 90mm instead of 10mm lateral movement of the pipe which is NOT modeling a real-world guide

10mm 10mm

Pipe +guide move together 90mm

100mm Structure

20mm 10mm 10mm

Vert Inclined

Horiz. Inclined

Friction due to 90mm

Friction due to 10mm displacement

100mm Structural Displacement

100mm

20mm

No additional friction load

10mm Disp

Structure

100mm

AutoPIPE Model : V_REACTION_CHECK_X_GUIDE_INCL_100_displ 100mm DZ displacement from e.g. Structure movement applied at nodes A04, B04, C04 Node A04 Segment A is an AutoPIPE Guide with zero gaps Node B04 Segment B is an AutoPIPE Guide with 10mm gaps Node C04 Segment C is an Inclined Support (Z) with 10mm gaps plus V-Stop with large gap above the pipe. AutoPIPE : Guide B04

Friction

According to the LOG report resultant friction = 1340.8 due to DeadLoad (DL) i.e. 4469 x 0.3 …Ok X component of DL friction = 39.6/40.84 x 1340.8 = 1300 Add X friction = 260.7 due to bearing of 868.8 = 1560.7 (same AutoPIPE) Z component of DL friction = 10/40.84 x 1340.8 = 328 Add Z bearing of 868.8 = 1196.8 (same as AutoPIPE ) Conclusion: AutoPIPE Guides consider lateral friction from pipe moving across the gap and due to full applied displacement i.e. both vertical and horizontal restraints move together with applied displacement as in real guide cases.

Resultant Disp = 40.84mm

DZ = 10mm gap /Disp [1197N]

DX = 39.6mm [1561N]

Friction Calculation

AutoPIPE : Inclined + V-stop at C04 (2 supports)

Friction

V-Stop C04 (Y) – see below According to the LOG report resultant friction = 1340.8 due to DeadLoad i.e. 4469 x 0.3 X component of DL friction = 39.6/98.33 x 1340.8 = 540 same as AutoPIPE Z component of DL friction = 90/98.33 x 1340.8 = 1228 same as AutoPIPE Inclined C04 ( Z) Z component of DL friction = 90/98.33 x 1340.8 = 1228 is added to Z bearing = 2425 (same as AutoPIPE ) X -friction = 2425 x 0.3 = 727.5 (same as AutoPIPE ) Conclusion: Inclined and V-Stop supports act independently & consider lateral friction from the full applied pipe movement Not Correct for real-world guides

Resultant Disp = 98.33mm

DZ = 90mm Disp [1228N / -2425N (1197N)] Vstop / Inclined

DX = 39.6mm [540N / 727.5N (1268N)] Vstop / Inclined

Friction Calculation

V-Stop Shoe C04 Results

Caesar II Model : SIMPLE GUIDE WITH FRICTION.C2 Caesar guide and + Y support is equivalent to AutoPIPE V-stop + lateral inclined supports

Caesar Output Results:

AutoPIPE vs Caesar Guide Summary

Fx(N) Fy(N) FZ(N) AutoPIPE (B04)

1-Support Guide (‘Real-world’)

1561 -4460 -1197

AutoPIPE (C04)

Inclined-Z+V-Stop

1268 -4460 -1197

Caesar (50) 2 Support Guide (Z+Y)

1226 -4460 -1198

Conclusion: AutoPIPE Guide B04 is a real-world Guide behavior under applied structural movement where the pipe is both guided and supported on the steel structure. Caesar shows a non-conservative FX friction load on the guided support by 23%.