1. 6/25/20081 Soil-Structure Interaction Analysis of a Composite Structure on a Backfill Hilltop WSRC-STI-2008-00269 Rev 0 Lisa Anderson, Bechtel National, Inc. Jay Amin, Washington Savannah River Co. June 25, 2008 2008 GT STRUDL Users Group Meeting & Training Seminar

2. 26/25/2008 Overview Scope of Analysis Building Description AnalysisConclusions

3. 6/25/20083 Scope of Analysis

4. 46/25/2008 Scope of Analysis Assess feasibility of adding new process to this complex Building complex constructed in 1980’s Building complex constructed in 1980’s Not designed to resist current seismic loads or wind loads Not designed to resist current seismic loads or wind loads Lateral load path is not well defined Lateral load path is not well defined

5. 56/25/2008 Scope of Analysis Evaluate the structures for Normal operating dead and live loads Normal operating dead and live loads PC-3 seismic loads* PC-3 seismic loads* PC-2 wind loads* PC-2 wind loads* administrative controls will stop process prior to tornado events II/I concerns* II/I concerns* *DOE Standard 1020

6. 6/25/20086 Building Description

7. 76/25/2008 Building Complex Split up for analysis Filter Cells and Hold Tank Room (Concrete) Filter Cells and Hold Tank Room (Concrete) Enclosure Building (Steel) Enclosure Building (Steel) Benzene Stripper Building (Composite) Benzene Stripper Building (Composite)

8. 86/25/2008 Building Complex

9. 96/25/2008 Building Complex

10. 6/25/200810 Analysis

11. 116/25/2008 Finite Element Models Create finite element models in GT STRUDL using a model builder program Filter Cells and Hold Tank Room Filter Cells and Hold Tank Room Convert Filter Cells and Hold Tank Room to SASSI House Model STRUSASSI Enclosure Building Enclosure Building Benzene Stripper Building Benzene Stripper Building

12. 126/25/2008 Filter Cells and Hold Tank Room 1:1 Mesh except column support SBHQ6 Elements

13. 136/25/2008 Enclosure Building

14. 146/25/2008 Benzene Stripper Building < 2:1 Mesh SBHQ6 Concrete Elements

15. 156/25/2008 General Site Analysis Generation of time histories Amplified for hilltop Free-field soil analysis

16. 166/25/2008 Amplified Hilltop Response Spectra

17. 176/25/2008 Horizontal Hilltop Time History Time History Plot

18. 186/25/2008 Soil Profile

19. 196/25/2008 Soil Profile

20. 206/25/2008 Free-Field Soil Analysis Best Estimate Soil (Upper and Lower Bound not shown) High Strain Low Strain

21. 216/25/2008 Filter Cells and Hold Tank Room Analysis Perform Soil-Structure Interaction (SSI) on the Filter Cells and Hold Tank Room SASSI model Obtain response at connection points of Enclosure Building Obtain response at connection points of Enclosure Building Apply response to FEM of Enclosure Building and Benzene Stripper Building Apply response to FEM of Enclosure Building and Benzene Stripper Building

22. 226/25/2008 Filter Cells and Hold Tank Room Mode Shapes EW Frequency 26 Hz NS Frequency 28 Hz E-W N-S

23. 236/25/2008 Filter Cells and Hold Tank Room Transfer Functions Frequency 26 Hz Fixed-Base Frequency 7 Hz Soil Structure Interaction

24. 246/25/2008 In-Structure Response Spectra at Top of Filter Cells

25. 256/25/2008 In-Structure Response Spectra at Top of Hold Tank Room Spectra Amplifies at Thin Wall of Hold Tank Room

26. 266/25/2008 Filter Cells and Hold Tank Room Analysis Perform SSI on the House model Obtain zero-period accelerations at each node Obtain zero-period accelerations at each node Apply as equivalent static loads in GT STRUDL Run GT STRUDL stiffness analysis Apply section cuts to obtain demands Apply section cuts to obtain demands Compute capacities based on existing conditions Compute capacities based on existing conditions Shear wall demand to capacity spreadsheet macro Report demand to capacity ratios Report demand to capacity ratios

27. 276/25/2008 Filter Cells and Hold Tank Room Shear Demands

28. 286/25/2008 Enclosure Building Analysis Run GT STRUDL response spectra analysis Using the soil-structure interaction input motion Using the soil-structure interaction input motion Check ASD9 code Check ASD9 code Check ASCE 7-05 wind loads Check ASCE 7-05 wind loads Report demand to capacity ratios Report demand to capacity ratios

29. 296/25/2008 Enclosure Building Mode Shapes N-S EW Frequency 2.9 HzNS Frequency 4.3 Hz

30. 306/25/2008 Enclosure Building Mode Shapes at Stairwell Occurs at NS Frequency 1.8 Hz

31. 316/25/2008 Enclosure Building ASD9 Code Check Members in red fail due to seismic F  factor is necessary

32. 326/25/2008 Enclosure Building F  Factor The elastically calculated PC-3 seismic responses can be reduced by the inelastic energy absorption capacity factor (Fμ).

33. 336/25/2008 Enclosure Building ASCE 7 Wind Loading 107 mph

34. 346/25/2008 Enclosure Building Wind Demand to Capacity Ratios

35. 356/25/2008 Enclosure Building Shear Comparison PC-2 Wind Base Shear EW 137 kips < PC-3 Seismic Base Shear 150 kips PC-2 Wind Base Shear NS 68 kips < PC-3 Seismic Base Shear 112 kips

36. 366/25/2008 Benzene Stripper Building Analysis Run GT STRUDL response spectra analysis Using the soil-structure interaction input motion Using the soil-structure interaction input motion Including ASCE 7-05 wind Including ASCE 7-05 wind Check ASD9 code Check ASD9 code Report demand to capacity ratios Report demand to capacity ratios Apply section cuts to obtain concrete demands Apply section cuts to obtain concrete demands Compute capacities based on existing conditions Compute capacities based on existing conditions Shear wall demand to capacity spreadsheet macro Report demand to capacity ratios Report demand to capacity ratios

37. 376/25/2008 Benzene Stripper Building Mode Shapes EW Frequency 3.9 HzNS Frequency 3.0 Hz

38. 386/25/2008 Benzene Stripper Building Seismic Demand to Capacity Ratios

39. 396/25/2008 Benzene Stripper Building ASCE 7 Wind Loading 107 mph

40. 406/25/2008 Benzene Stripper Building ASCE 7 Wind Loading

41. 416/25/2008 Benzene Stripper Building Wind Demand to Capacity Ratios Braces that exceed 1.0 are qualified as tension members

42. 426/25/2008 Seismic Displacements Enclosure Building Displacement Wind Seismic NS 0.07 in 0.26 in EW 0.18 in 0.97 in Vertical 0.98 in 1.21 in Stripper Building Displacement Wind Seismic 0.001 in 0.001 in Enclosure North

43. 6/25/200843 Conclusions

44. 446/25/2008 Conclusions Adequate for PC-3 seismic and PC-2 wind loads Enclosure Building Enclosure Building Filter Cells and Hold Tank Room Filter Cells and Hold Tank Room Benzene Stripper Building Benzene Stripper Building No pounding occurs

45. 6/25/200845 Questions?