6/25/13 - updated mpower presentation slides, 'generation ... · to the same design response...

generation

Implementation of Random Vibration Theoryfor Seismic Soil-Structure Interaction

C 2013 bcock & Wilcox mPower Inc. and 0 2013 Bechtel Power Corporton. Al resre.

generation

InPower RVT Topical Report

Presentation Outline

* Introduction / Background

• RVT for SSI Analysis

0 Verification

• Summary and Conclusion

0 2013 Babcock & Wilcox mPower Inc. and 0 2013 Bechtel Power Corporation. All rights reserved. 85

generation

ZPO we RVT Topical Report

Introduction / Background

" Current practice for seismic SSI analysis utilizes time historiesgenerated to match design response spectra

" Several methods are available to generate time histories

• The number of time histories required to obtain a stable meanresponse has been challenged recently in several studies involving SSIanalysis

" The new ASCE 4 standard to be issued in 2013/2014 [

I

" The newly issued draft SRP 3.7.1 asks for closer inspection of powerspectral density before a time history is used for design

[CCI per Affidavit 4(a)-(d)]

0 2013 Babcock & Wilcox mPower Inc. and C 2013 Bechtel Power Corporation. All rights reserved. 86

generation

mMo rRVT Topical Report

Introduction / Background* The choice of appropriate seed time histories for CEUS sites is very

limited* Structural responses can vary considerably depending on the time

history used as input, even when the input time histories are matchedto the same design response spectrum

" For design, mean seismic responses are required" Obtaining stable mean structural responses with limited time histories

is challenging* The RVT methodology avoids using time histories as input and works

directly with the design response spectrum

[[CCI per Affidavit 4(a)-(d)]

© 2013 Babcock & Wilcox mPower Inc. and Q 2013 Bechtel Power Corporation. All rights reserved. 87

generation

",PE RVT Topical Report

Introduction / Background

" RG 1.208 permits RVT-based site amplification analysis

" RVT has been used in several recent COL applications for siteresponse analysis and development of GMRS and FIRS

• The NRC has evaluated the RVT approach used by COL applicants byan independent program based on the RVT approach as reported inSERs

* One of the early applications of RVT for SSI analysis was formulated inthe computer program PLUSH (1977)

© 2013 Babcock & Wilcox mPower Inc. and © 2013 Bechtel Power Corporation. All rights reserved. 88

generation

mIPOWe RVT Topical Report

RVT Approach

The main computational steps in the RVT approach are:

[

I[CCI per Affidavit 4(a)-(d)]


generation

mIPowe RVT Topical Report

RVT Approach

I



generation

JL~wvA RVT Topical Report

RVT Formulation

[

I


© 2013 Babcock & Wilcox mPower Inc. and 0 2013 Bechtel Power Corporation. All rights reserved. 91

generation

miJower RVT Topical Report

RVT Formulation

I[CCM per Affidavit 4(a)-(d)]


generation

mTPowe RVT Topical Report

RVT Process Steps


93Q 2013 Babcock & Wilcox mPower Inc. and 0 2013 Bechtel Power Corporation. All rights reserved.

generationRVT Topical Report

RVT Process Steps

I



generationRVT Topical Report

[ I



generation...... ew...... RVT Topical Report

--- - IVERIFICATION

Earlier Discussion on[

RVT Topical Report Examples

](May 2012)

I



generation

miPower SASSI2010 - RVT

[

][CCI per Affidavit 4(a)-(d)]


generationmr we SASSI2010 - RVT



generation

m~ower SASSI2010 - RVT

[

I[CMI per Affidavit 4(a)-(d)]


generationSASSI2010 - RVT



generation

mPower SASSI2010 - RVT


101© 2013 Babcock & Wilcox mPower Inc. and © 2013 Bechtel Power Corporation. All rights reserved.


][CC] per Affidavit 4(a)-(d)]

1020 2013 Babcock & Wilcox mPower Inc. and 0 2013 Bechtel Power Corporation. All rights reserved.

generation

m~Pow SASSI2010 - RVT

I[CCM per Affidavit 4(a)-4d)J


generation



104© 2013 Babcock & Wilcox mPower Inc. and C 2013 Bechtel Power Corporation. All rights reserved.

generation

SASS12010 - RVT


© 2013 Babcock & Wilcox mPower Inc. and C 2013 Bechtel Power Corporation. All rights reserved. 105

generationIn! TTww:• SASS12010 - RVT

I[CCM per Affidavit 4(a)-(d)J


generation

"Inpow SASS12010 - RVT




I[CCI per Affidavit 4(a)-dl]


generationmPower SASSl2010 - RVT

I[CCI per Affidavit 4(a),-(4)f


generationmr we SASSI2010 - RVT

I[CCM per Affidavit.4(aHd)l


generation

in~ower SASSI201 0 - RVT

[


0 2013 Babcock & Wilcox mPower Inc. and © 2013 Bechtel Power Corporation. All rights reserved. ill

generationSASS12010 - RVT

[




[

I[CCM per Affidavit 4(arid)l

1130 2013 Babcock & Wilcox mPower Inc. and C 2013 Bechtel Power Corporation. All rights reserved.


[



I -


[



generationmJ•owe" SASS12010 - RVT

[



generation


[




[

I[CCI per Affidavit 4(a)-(d)J


generation

mPower RVT Summary

" RVT has been used extensively for development of GMRSand FIRS

" A number of Safety Evaluation Reports have endorsed theresults of RVT for site response analysis

[



generation

mnPower. RVT Summary

[



generation

m17n r RVT Summary

* Obtaining mean seismic responses for design using the timehistory approach would require multiple sets of time histories

[


124© 2013 Babcock & Wilcox mPower Inc. and 0 2013 Bechtel Power Corporation. All rights reserved.

generationRVT Summary

][CCI per Affidavit 4(a)-(d)]


generationmlower

Discussions


6/25/13 - updated mpower presentation slides, 'generation ... · to the same design response...

Documents