Structural Design Codes Verifier

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Marylou Cain
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1 Wouter van den Bos, SDC Verifier Owner Structural Design Codes Verifier Femap Symposium 2014 May 14-16, Atlanta, GA, USA FEMAP SYMPOSIUM 2014 Discover New Insights

2 What is SDC Verifier? The goal of SDC Verifier is checking structures according to standards and report generation. Page 2

3 Practical use of SDC Verifier Recognition tools Beam Member Y and Z Length Plate Length and Width Weld Classification (Customizable) Checks Reporting Page 3

4 Femap and SDC Verifier Model Data; Boundary Conditions; Analysis Results; Plotting; Export Extra Results; Apply Complicated Loads; Page 4

5 SDC Verifier Separate and Embed Mode Separate GUI Embedded Page 5

6 History January 2009 : December 2011: Start of SDC Verifier program development SDC Verifier 1.3 first commercial version Key features: report generation, standard based calculation structure, fatigue. April 2012: SDC Verifier 2.0 Key features: report generation, report previewer, overall tables, custom checks July 2012: SDC Verifier 2.1 Key features: report designer improvements,plate buckling, rule base selector. November 2012 : SDC Verifier Key features: beam length recognition(basic), panel finder(basic), API 2A standard September 2013: SDC Verifier 3.0 Key features: model recognition tools, standard checks, SDC embedded in Femap April 2014: SDC Verifier 3.5 Key features: weld recognition, histogram, opened plate buckling, Plate Buckling DNV2010; Page 6

7 19 Individual loads 18 Load Sets 3 Load Groups Load combinations: example from Standard A lot of loads and combinations should be checked according to standards. SDC Verifier implements: Individual Loads; Load Sets; Load Groups. Page 7

8 Load combinations: Add/Edit Multiple Create/edit few Load combinations at once. Import Load Sets or Load Groups from MS Excel Page 9

9 Tools Panel Finder; Weld Finder; Beam Member Finder; Complicated Loads: Wind, Buoyancy and Tank Load; Moment Shear and Force; Rule Based Selector. Page 10

10 Panel finder Sections X vs Elements Count Plates plot Frames Page 11

11 Weld finder Recognizes all welds and updates weld direction automatically. Fatigue check on single weld Fatigue check EN13001 Check static weld strength (eurocode) Page 12

12 Beam Member Finder Helps to define beam length. Can be used in Beam Buckling Check and custom checks. Beam Length Plot User can modify joints manually or even define own (user) joints. Types of Joints Page 13

13 Example: AISC Buckling Check Buckling check Beam members Length of beam members Page 14

14 Wind and Buoyancy Loads Wind Buoyancy (water level calculation) Pressure (depend on height) Water pressure including wave parameters. Page 15

15 Tank Ballast Load Tank Load Global and local waterline Accelerations on tank content included Applied force and volume Height along vertical axis Page 16

16 Moment and Shear Force At section Shear Force Moment Page 17

17 Rule based Selector Rule Types: - Materials; - Properties; - Groups; - Coordinate; - Element Types; - Element Shapes. Operations: - Add; - Remove; - Exclude; - Reselect. Always Up to date Coordinate Rule Page 18 Element Types Rule

18 Standards and Custom Checks Fatigue check according to different methods and standards; Plate Buckling according to ABS and DNV standards; Custom Checks (anything can be checked as long as the formula is known); Custom Checks Examples; API RP 2A Tubular Joint Check; Page 19

19 Fatigue Check example (mean stress correction) Used by standards as DIN 15018, FEM 1.001, NEN 2018/2019 and FKM Fatigue Allowable Stress Design (Goodman relation) Allowable Stress depends on classification For single stresses Combined Element Group 6 more than 2 millions cycles K4 welds example Page 20

20 Fatigue Example Allowable Fatigue Stress depends on Weld Class and Kappa=Smin/Smax Notch group/weld Class Weld Class K3 - Green Weld Class K2 - Red Allowable Stress vs Kappa Utilization Factor (Smax/Sallow) Page 21

21 Plate Buckling Check (ABS, DNV) Automatically convert element stresses into plate direction. Automatically recognized dimensions of plates Results over sections. Values which do not pass the check are highlighted in red. Page 22

22 SDC Verifier is customizable If check is missing use custom check Page 23

23 Simple example 1: Static Stress Check Lloyds criteria Different factors for different Stress directions Page 24 Overall Utilization Factor

24 API RP 2A Tubular Joint Check Recognize Joint Type (based on Forces) Recognize Brace, Chord and Gap Page 25

25 SDC Reporting Standard reports Report Wizard; Report Designer. Report Wizard easy step by step report Report Designer previewer. Advanced report Page 26

26 Report Generation in Designer Export To Word/pdf Toolbox with all available items Menu structure report Context menu Extra Items Manage /preview etc Properties items Preview document Page 27

27 Open with template: re-use calculation First model (template) New Model Two models. Same report 31 Page 31

28 Conclusions SDC Verifier the add-on for: Verification of structure according to standards Simple application of complicated loads Translation of FEM results in (complicated) code checking results Complete documentation of model and results Focus on engineering lets SDC Verifier do the bookkeeping Use 45 days trial to check it yourself (download SDC Verifier on and request trial at Page 32

29 Standards in progress Plate Buckling DNV RP-C (Stiffener and Girders checks); AISC LRDF (tension and compression checks are already implemented); EN 13001; F.E.M ; Plate Buckling ABS 2013; Eurocode 3; Suggestions? Page 33

30 Improvements Panel Finder improvements: recognition of Panels and plates (currently only plates), stiffeners and girders; Update Plate Buckling Calculation approach: use plate edge stresses; Weld Finder: Recognition of Weld Types; Reading op2 files; Unit system; Suggestions? Page 34

Structural Design Code Verifier. Be an analyst not an admin

Structural Design Code Verifier Be an analyst not an admin SDC Verifier Embedded 2 Separate GUI What is SDC Verifier? The goal of SDC Verifier is checking structures according to standards and report generation.