Example of Field Seismic and Dynamic Laboratory Procedures for …sshac.ncree.org.tw/download/20190731_Kenneth_The... · 2019-10-29 · Examples: Field Seismic Testing for NQA-1 Projects

The University of Texas at Austin

Civil, Architectural and Environmental Engineering

Example of Field Seismic and Dynamic

Laboratory Procedures for NQA-1 Projects

July 31, 2019

National Center for Research on

Earthquake Engineering (NCREE)

Taipei, Taiwan

Kenneth H. Stokoe, ll

University of Texas at Austin

1



What is NQA-1?

ASME NQA-1 (Nuclear Quality Assurance-1) is a regulatory standard created

and maintained by ASME (American Society of Mechanical Engineers).

The ASME Nuclear Quality Assurance (NQA-1) Certification Program providescentralized, independent, third-party certification for quality assurance programs inconformance with the ASME NQA-1 standard, "Quality Assurance Requirements forNuclear Facility Applications". It entails a full audit of the Quality Assurance Programperformed by trained ASME auditors with an extensive background in quality assurance.A successful audit will yield a NQA-1 Quality Program Certificate.

The ASME NQA-1 Certification Program seeks to meet the needs of the nuclear industryby expanding the supply chain with organizations who are committed to understandingquality and providing high quality products and services.

Reference: The American Society of Mechanical Engineers website

2

http://www.asme.org/kb/standards#des=NQA



NQA-1 Process

Calibration: Performed yearly by the “contractor” conducting

the testing. Most test equipment has a 1-year cycle (some have

2-year cycles) involved in the testing program. However,

calibration may also have to be verified at a field site just

before the field testing begins and immediately after the field

testing is completed.

External Calibration: Laboratories that have NIST traceable

calibrations are generally used to calibrate “local standards”

that are, in turn, used to calibrate all other equipment at the

project facility. The “local standards” are then quarantined

during the year-long testing cycle.

Internal Calibration: Performed by the “contractor”3



Examples: Field Seismic Testing

for NQA-1 Projects

(SASW, Crosshole and

Downhole Testing)

4



External Calibration of Equipment Used in Field Seismic Testing

EQUIPMENT DESCRIPTIONSERIAL

NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF

USE

COMPANY SPECIAL STATUS

Agilent 35670ADynamic Signal

AnalyzerMY41005676 MY41005676 2016-04-22 2017-04-22

See Report

#3397920004RETRIEVABLE

Agilent 34401A Digital Multimeter US36105870 US36105870 2016-04-21 2017-04-21See Report


Columbia Model 3021 Accelerometer 2120 2120 2016-04-27 2017-04-27See Report


Columbia Model 4102M Charge Amplifier 813 813 2016-05-16 2017-05-16See Report


Agilent 33120A Function Generator SG40019058 SG40019058 2016-04-19 2017-04-19See Report


L.S. Starrett 465M Micrometer Head 99061016 993873 2016-04-28 2018-04-28See Report


UT MASTER M&TE LIST For FIELD SEISMIC TESTING - NIST TRACEABLE M&TE

Trescal, Inc

Certificate :

#2516.01

#1022.01

Standard NIST Traceable M&TE

*

*

**

* (2 pgs) Included in this Package as an Example

* * (27 pgs) Not Included in this Package

5



External Calibration – Charge Amplifier

6



External Calibration – Accelerometer

7




NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF

USE


Lamda Model LL-902Regulated Power

SuppplyUT408705 UT408705 2016-05-21 2017-05-21 RETRIEVABLE

Bently Nevada 19049Proximitor

(11mm Probe #3)120137 120137 2016-05-21 2017-05-21 RETRIEVABLE

Mark Products L4 1-Hz Geophone 1067 1067 2017-03-28 2018-03-28 RETRIEVABLE





Brown and Sharpe Micrometer 2 2 2016-05-21 2017-05-21

See Report

Calibration Procedure

Micrometer

RETRIEVABLE

Quattro4-Channel Signal

Analyzer20891 20891 2016-05-21 2017-05-21

See Report


4-Channel Signal

Analyzer

RETRIEVABLE

Quattro4-Channel Signal

Analyzer21279 21279 2016-05-21 2017-05-21

See Report


4-Channel Signal

Analyzer

RETRIEVABLE

UT MASTER M&TE LIST For FIELD SEISMIC TESTING - CALIBRATED By UT

Items Calibrated by UT

See Report


See Report

Laboratory Calibration

Procedure of Vertical

1-Hz Geophones

University of

Texas at

Austin

*

**

* (7 pgs) Included in this Package as an Example

* * (6 pgs) Included in this Package as an Example

Internal Calibration of Equipment Used in Field Seismic Testing

8




NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF

USE


Geospace GS-11D 4.5-Hz Geophone 1 1 2017-03-28 2018-03-28 RETRIEVABLE



Agilent 33120A16-Channel Signal

Analyzer6003043 6003043 2013-10-31 2014-10-31

See Report


16-Channel Signal

Analyzer

RETRIEVABLE

3-D Receiver3 Geospace 101 LT,

14-Hz GeophonesUT2005-CH02 UT2005-CH02 2016-12-19 2017-12-19 RETRIEVABLE





Crosshole Source

Mechanical Clamping

and Drop-Weight

System

UTCHS01 UTCHS01 2016-12-19 2017-12-19 RETRIEVABLE

Trigger 28-Hz Geophone UTXT03 UTXT03 2016-12-19 2017-12-19 RETRIEVABLE

See Report

Laboratory Calibration

Procedure of Vertical

4.5-Hz Geophones

See Report

Crosshole

Source/Receiver

Verification

Measurements

University of

Texas at

Austin

UT MASTER M&TE LIST For FIELD SEISMIC TESTING - CALIBRATED By UT

Items Calibrated by UT

Internal Calibration of Equipment Used in Field Seismic Testing

9



The SASW test set-up and example data

10



Internal Calibration – 1-Hz Geophone (pg. 1/4)

11




12




13



Internal Calibration – 1-Hz Geophone (pg. 4/4) Pg.10 shows a typical set-up and

where each piece of equipment fits

14

(Note: Geophone outputs normalized to geophone 1091)

Key measurement



Internal Calibration – 4-Channel Signal Analyzer (pg. 1/4)

15




16




17




18



Internal Calibration – 4-Channel Signal Analyzer Software

19



SASW Software(WINSASW) Verification

20



SASW Software(WINSASW) Verification (pg. 1/4)

21




22




23




24



SASW Testing and Analysis Procedures

25



26



27



28



29



30



31



32



33



Crosshole Calibration Activities

- Initial Calibration (Lab)

- Pre-Calibration (Before Field Testing)

- Post-Calibration (After Field Testing)

34



Initial Calibration (Lab) – Crosshole source/receiver (pg. 1/2)

35



Initial Calibration (Lab) – Crosshole source/receiver (pg. 2/2)

36



Internal Pre/Post Calibration (Field) – Crosshole source/receiver (pg. 1/3)

37




38

Pre-Calibration (Before Field Testing)




39

Post-Calibration (After Field Testing)



Example of Dynamic Laboratory

Calibration Procedures for NQA-1

Projects

40



41

1. Laboratory NQA Calibration

1.1 Laboratory Calibration Organization

1.1 NIST Traceable Calibration

1.2 Internal Calibrations

2. Technical Procedures for RCTS Testing

2.1 Specimen Preparation

2.2 Resonant Column Testing Procedure

2.3 Resonant Column Testing Examples

2.4 Torsional Shear Testing Procedure



42

Laboratory Testing Set-Up: Combined Dynamic Torsional Resonant Column and Cyclic Torsional Shear Device (RCTS Device)

(a) Reconstituted sand

specimen on base pedestal and

confined using a vacuum

(b) Driving and monitoring

systems on support cylinder

(c) Simplified schematic of

RCTS confining system



43

UT Soil and Rock Dynamic Laboratory and RCTS Equipment



Laboratory Calibration Organization

44



45

UT MASTER M&TE LIST


NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF USE

SPECIAL

STATUS

HP 53131A Universal Counter 3416A05562 3416A05562 2016/7/8 2017/7/8 See Report #1938001 RETRIEVABLE

Agilent 34401A Digital Multimeter US36105870 US36105870 2016/4/21 2017/4/21See Report


Agilent 33120AFunction/Arbitrary

Waveform GeneratorSG40019058 SG40019058 2016/4/19 2017/4/19

See Report


HP 3562ADynamic Signal

Analyzer2502A00579 2502A00579 2016/7/11 2017/7/11 See Report #1938002 RETRIEVABLE

Columbia Model 3021 Accelerometer 2120 2120 2016/4/27 2017/4/27See Report


Columbia Model 4102M Charge Amplifier 813 813 2016/5/16 2017/5/16See Report


Omega PX309-150G5VDifferential Pressure

Transducer031814D264 031814D264 2016/7/8 2017/7/8 See Report #1938003 RETRIEVABLE

Sensotec Z/0761-29ZG Pressure Transducer 756196 756196 2016/7/8 2017/7/8 See Report #1938004 RETRIEVABLE

Sensotec 060-3147-01 Readout Unit 783809 783809 2016/7/8 2017/7/8 See Report #1938004 RETRIEVABLE

L.S. Starrett 465M Micrometer 99061016 993873 2016/4/28 2018/4/28See Report


Mitutoyo Digital Caliper 6283603 6283603 2016/7/8 2017/7/8 See Report #1938008 RETRIEVABLE

RH520Temperature Humidity

RecorderCH05770 CH05770 2016/8/2 2017/8/2 See Report #1938011 RETRIEVABLE


NIST Traceable Calibration - 20 pieces of equipment

*

Included in this Package as an Example*



NIST Traceable Calibration – 20 pieces of equipment

46


NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF USE

SPECIAL

STATUS

Troemner (1g - 100g) Calibration Weight Set 17723 17723 2016/7/8 2017/7/8 See Report #1938015 RETRIEVABLE

Ohaus (200 g) Calibration Weight GEC-99002 GEC-99002 2016/7/8 2017/7/8 See Report #1938021 RETRIEVABLE

Ohaus (500 g) Calibration Weight GEC-99003 GEC-99003 2016/7/8 2017/7/8 See Report #1938022 RETRIEVABLE

Ohaus (1 kg) Calibration Weight GEC-99004 GEC-99004 2016/7/8 2017/7/8 See Report #1938028 RETRIEVABLE

Ohaus (2 kg) Calibration Weight GEC-99005 GEC-99005 2016/7/8 2017/7/8 See Report #1938031 RETRIEVABLE

Ohaus (2 kg) Calibration Weight 4684 4684 2016/7/8 2017/7/8 See Report #1938035 RETRIEVABLE

Ohaus (5 kg) Calibration Weight 3105 3105 2016/7/8 2017/7/8 See Report #1938038 RETRIEVABLE

Troemner (10 kg) Calibration Weight 2530 2530 2016/7/8 2017/7/8 See Report #1938042 RETRIEVABLE




NIST Traceable Calibration – Micrometer

47



Internal Calibrations – 61 pieces of equipment


NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF USE

SPECIAL

STATUS

Sartorius MSE8202S Weight Balance 31913378 2017-1 2017/3/22 2018/3/22See Project Document

App. 2RETRIEVABLE

Ohaus Champ Square CQ25R Weight Balance 06573236DG 2017-2 2017/3/22 2018/3/22See Project Document

App. 2RETRIEVABLE

University of Texas (TC)2.5 in. Stainless Steel

Top Cap2 2017-3 2017/3/23 2018/3/23

See Project Document

App. 2RETRIEVABLE


Top Cap3 2017-4 2017/3/23 2018/3/23


App. 2RETRIEVABLE

University of Texas (TC)2.8 in. Aluminum Top

Cap6 2017-5 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap7 2017-6 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap8 2017-7 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap9 2017-8 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap10 2017-9 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap11 2017-10 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap12 2017-11 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap13 2017-12 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap14 2017-13 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap15 2017-14 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap16 2017-15 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap17 2017-16 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap A18 2017-17 2017/3/23 2018/3/23


App. 2RETRIEVABLE

**Items Calibrated by UTA**

48





NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF USE

SPECIAL

STATUS

Sartorius MSE8202S Weight Balance 31913378 2017-1 2017/3/22 2018/3/22See Project Document

App. 2RETRIEVABLE

Ohaus Champ Square CQ25R Weight Balance 06573236DG 2017-2 2017/3/22 2018/3/22See Project Document

App. 2RETRIEVABLE


Top Cap2 2017-3 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap3 2017-4 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap6 2017-5 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap7 2017-6 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap8 2017-7 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap9 2017-8 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap10 2017-9 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap11 2017-10 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap12 2017-11 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap13 2017-12 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap14 2017-13 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap15 2017-14 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap16 2017-15 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Cap17 2017-16 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap A18 2017-17 2017/3/23 2018/3/23


App. 2RETRIEVABLE


49





NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF USE

SPECIAL

STATUS


Top Cap B19 2017-18 2017/3/23 2018/3/23


App. 2RETRIEVABLE


Top Cap C20 2017-19 2017/3/23 2018/3/23


App. 2RETRIEVABLE

University of Texas (CP)Stainless Steel

Calibration Plate1 2017-20 2017/3/23 2018/3/23


App. 2RETRIEVABLE




App. 2RETRIEVABLE




App. 2RETRIEVABLE

L.S. Starrett 763 Micrometer 1 2017-23 2017/3/23 2018/3/23See Project Document

App. 2RETRIEVABLE

Brown and Sharpe Micrometer 2 2017-24 2017/3/23 2018/3/23See Project Document

App. 2RETRIEVABLE

Agilent E3620A DC Power Supply LR38497C 2017-25 2017/3/26 2018/3/26See Project Document

App. 2RETRIEVABLE

Lambda Model LL-903Regulated Power

SupplyUT238462 2017-26 2017/3/26 2018/3/26


App. 2RETRIEVABLE

Bently Nevada 330100--50-05 Proximitor (Probe 3-Y) FEB G106073 2017-27 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Bently Nevada 330100--50-05 Proximitor (Probe 4-R) FEB G106076 2017-28 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Bently Nevada 330100--50-05 Proximitor (Probe 5-Y) 04H006X9 2017-29 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Bently Nevada 330100--50-05 Proximitor (Probe 6-R) 04H006XT 2017-30 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Bently Nevada 330100--50-05 Proximitor (Probe 7-Y) 07B003X9 2017-31 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Bently Nevada 330100--50-05 Proximitor (Probe 8-R) 07B003XP 2017-32 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Bently Nevada 330100--50-05 Proximitor (Probe 9-Y) 07B003Y5 2017-33 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Bently Nevada 330100--50-05 Proximitor (Probe 10-R) 07B003XN 2017-34 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE


50




NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF USE

SPECIAL

STATUS

Columbia Model SH-200-S3R LVDT 7907 2017-35 2017/3/23 2018/3/23See Project Document

App. 2RETRIEVABLE


App. 2RETRIEVABLE


App. 2RETRIEVABLE

Heise CM-60750 (0 - 6.1 psi) Vacuum Gage (No. 3) UT409547 2017-38 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Ashcroft (0-73psi) Pressure Gage (No. 1) UT279327 2017-39 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

Ashcroft (0-500psi) Pressure Gage (No. 2) UT289551 2017-40 2017/3/27 2018/3/27See Project Document

App. 2RETRIEVABLE

HP 6824A Power Supply Amplifier 1716A02655 2017-41 2017/3/28 2018/3/28See Project Document

App. 2RETRIEVABLE

HP 6824A Power Supply Amplifier 1027A01995 2017-42 2017/3/28 2018/3/28See Project Document

App. 2RETRIEVABLE

Columbia Model 4102MCharge Amplifier

(w/Accel 2919)119 2017-43 2017/4/10 2018/4/10


App. 2RETRIEVABLE

Columbia Model 302-6 Accelerometer (No. 1) 2919 2017-44 2017/4/10 2018/4/10See Project Document

App. 2RETRIEVABLE


(w/Accel 3878)849 2017-45 2017/4/10 2018/4/10


App. 2RETRIEVABLE


App. 2RETRIEVABLE


(w/Accel 3878)604 2017-47 2017/4/10 2018/4/10


App. 2RETRIEVABLE


App. 2RETRIEVABLE


(w/Accel 3879)850 2017-49 2017/4/10 2018/4/10


App. 2RETRIEVABLE


App. 2RETRIEVABLE

NI PXI-6251 #1M Series DAQ -

Multimeter01A29AFB 2017-51 2017/4/11 2018/4/11


App. 2RETRIEVABLE



Included in this Package as Examples

*

*

*

51




Sixty-one (61) pieces of equipment are calibrated in the internal calibration effort.

Different equipment have different required accuracies of equipment in the

procedure.

In the internal calibration, the percent difference is calculated to verify the

equipment performance.


NUMBER

CALIBRATION

I.D. NUMBER

CALIBRATION

DATE

EXPIRATION

DATE

CALIBRATION

TOLERANCE OR

LIMITATIONS OF USE

SPECIAL

STATUS


Multimeter01837EC9 2017-52 2017/4/11 2018/4/11


App. 2RETRIEVABLE


Function Generator01A29AFB 2017-53 2017/4/11 2018/4/11


App. 2RETRIEVABLE


Function Generator01837EC9 2017-54 2017/4/11 2018/4/11


App. 2RETRIEVABLE

NI PXI-4462 #1 DSA - Multimeter 019A1FAA 2017-55 2017/4/11 2018/4/11See Project Document

App. 2RETRIEVABLE

NI PXI-4462 #2 DSA - Multimeter 01A7E02C 2017-56 2017/4/11 2018/4/11See Project Document

App. 2RETRIEVABLE

NI PXI-4462 #1DSA - Function

Generator019A1FAA 2017-57 2017/4/11 2018/4/11


App. 2RETRIEVABLE

NI PXI-4462 #2DSA - Function

Generator01A7E02C 2017-58 2017/4/11 2018/4/11


App. 2RETRIEVABLE

University of Texas (DP) Drive Plate 4 2017-59 2017/4/15 2018/4/15See Project Document

App. 2RETRIEVABLE


App. 2RETRIEVABLE


App. 2RETRIEVABLE


52



Internal Calibration of the Low-Pressure Gage

53



Internal Calibration of the Power Supply Amplifier

54



RCTS Equipment

(a) Top View of RCTS Set-Up (b) Section A-A of RCTS Set-Up

55



RCTS Specimen Preparation Procedure

56



Intact Specimen Preparation

57

Cutting An Intact Specimen from A Shelby Tube



Reconstituted Specimen Preparation

58

(a) Split Compaction Mold (b) Compaction Tamper

(c) One Reconstituted Sandy Specimen



Resonant Column Testing Procedure

(a) Schematic Diagram of the Dynamic

Monitoring System in the RC Test

(b) Example of A Small-Strain Frequency Response

Measured in the Fix-Free Resonant Column Test.

59



Resonant Column Testing Procedure


Monitoring System in the RC Test

(b) Example of the Free-Vibration Decay Curve

Measured in the Fix-Free Resonant Column Test.

60



Resonant Column (RC) Device

61

2 4 6

102 4 6

1002 4 6

10002

Duration of Confinment, t, minutes

400

300

200

100

0

Sm

all

-Str

ain

Sh

ear

Wa

ve

Vel

oci

ty, V

s , m

/sec

Specimen D

Depth = 7.8 m

0.0004%

Confining Pressure 14 kPa 28 kPa 55 kPa 110 kPa 221 kPa

(a) RC Device(b) Vs – Log Time



Consolidation and Secondary Consolidation

62(a) Log Gmax – Log Time (b) Void Ratio – Log Time



Small-Strain Behavior

63(a) Log Vs – Log s0’ (b) Void Ratio – Log s0’



Modulus Reduction Behavior

64(a) G – Log (b) G/Gmax – Log



Nonlinear Behavior

65(a) G/Gmax – Log (b) D – Log



RC Measurements: Nonlinear Shear Modulus Versus Strain at One Pressure

66(a) G/Gmax – Log (b) Frequency Sweeping

1.0

0.8

0.6

0.4

0.2

0.0

No

rma

lize

d S

hea

r M

od

ulu

s, G

/Gm

ax

10-5

10-4

10-3

10-2

10-1

100

Shearing Strain, , %

Sample Type: D: ~ 11.3 m, USCS: MHSample ID. UTA-82-G(7C)

s0 = 13 psi (1.87 ksf = 89.6 kPa)

Notes:

1. (1) Starting Data Point for Response Curves Plot

2. (3) Final Data Point for Response Curves Plot

(1)

(2)

(3)



RC Measurements: Nonlinear Damping Ratio Versus Strain at One Pressure

67(a) G/Gmax – Log (b) Free-Vibration Decays

Qu

ality

Facto

r, Q

10-5

10-4

10-3

10-2

10-1

100

Shearing Strain, , %

14

12

10

8

6

4

2

0

Mate

ria

l D

am

pin

g R

ati

o, D

, %

Sample Type: D: ~ 11.3 m, USCS: MHSample ID. UTA-82-G(7C)

s0 = 13 psi (1.87 ksf = 89.6 kPa)

?Plotted Free-Vibration Signals

3.33

6.67

(1)

Shearing Strains in RC Test werecorrected to the average of thefirst 3 free-vibration cycles

Notes:

1. (1) Starting Data Point for Free-Vibration Signals Plot

2. (3) Final Data Point for Free-Vibration Signals Plot3. Free-Vibration Signals are plotted vertically in consecutive order

(2)

(3)

Norm

ali

zed

Free-V

ibrati

on

Sig

nals

, V

ou

t/V

max

1.00.80.60.40.20.0

Time, t, seconds

(2)

Shearing Strains in RC Test werecorrected to the average of thefirst 3 free-vibration cycles

(1)

(3)Sample Type: D: ~ 11.3 m, USCS: MHSample ID. UTA-82-G(7C)

s0 = 13 psi (1.87 ksf = 89.6 kPa)



Torsional Shear Testing Procedure


Monitoring System in the TS Test

(b) Example of A Stress-Strain Curve Measured in the

Torsional Shear Test.

68



References• Keene, A. (2017). Next-Generation Equipment and Procedures for Combined

Resonant Column and Torsional Shear Testing. The University of Texas at Austin.

• Wang, YN. (2018). Development of Constitutive Models for Linear and Nonlinear

Shear Modulus and Material Damping Relationships of Uncemented Soils. The

University of Texas at Austin.

• Ni, S.H. (1987). Dynamic Properties of Sand Under True Triaxial Stress States

from Resonant Column/Torsional Shear Tests. Ph.D. Dissertation, The University

of Texas at Austin.

• Stokoe, K.H., Choi, W.K., Jeon, S.Y., and Lee, J.J. (2006). Test Procedures and

Calibration Documentation Associated with The RCTS and URC Tests at The

University of Texas at Austin. Geotechnical Engineering Report GR06-04,

Geotechnical Engineering Center of the Civil Engineering Department of The

University of Texas at Austin.

69

Documents

Example of Field Seismic and Dynamic Laboratory Procedures for …sshac.ncree.org.tw/download/20190731_Kenneth_The... · 2019-10-29 · Examples: Field Seismic Testing for NQA-1 Projects