Downhole Data Dictionary and Data Formatting Requirements Jamison Steidl. University of California at Santa Barbara Institute for Crustal Studies

Transcription

1 Downhole Data Dictionary and Data Formatting Requirements Jamison Steidl University of California at Santa Barbara Institute for Crustal Studies

2 OUTLINE Geotechnical and Earthquake Engineering Database Needs Why Downhole Data - Justification Database Structure, Dictionary, & Formatting Examples Garner Valley Downhole Database COSMOS VDC Database

3 Geotechnical and Earthquake Engineering Database Needs

4 Geotechnical and Earthquake Engineering Database Virtual Data Center Working Group Integration and Coordination Geotechnical Database Field Data and Laboratory Data COSMOS VDC Strong Motion Data Structural Array Database Downhole Array Database

5 A Geotechnical and Earthquake Engineering Database is: A Multi-Agency and Disciplinary Need An Integrated Research Tool A Comprehensive Data Product for the Practicing Engineer Agencies that would benefit from an integrated data center CDMG, FEMA, FHWA, USGS/ANSS, NSF-Geosciences NGES, SCEC, NSF-Engineering/NEES, PEER/PEARL, Could be part of a large Internet Technology Research(ITR) Program Integration & Visualization Tools to Link the Related Databases

6 Why Downhole Data - Justification

7 Borehole Seismic Instrumentation & The Earthquake Hazard Problem 1) Direct Estimation of Site Effects 1-D modeling of waveforms using physical models of near-surface structure. Estimation of attenuation effects. Separating 1-D and 3-D effects in ground motion recordings. 2) Nonlinear Effects on Ground Motion What is the degree of nonlinearity Numerical modeling of nonlinear soil dynamics-code validation/calibration 3) Ground Motion Prediction - Scenario Earthquakes Borehole data as empirical Green s functions for the surrounding region Borehole bedrock coherence Difference between borehole input ground motion and surface rock sites Basin borehole coherence 4) Details of the Earthquake Source Improved Imaging (removing surface effects) Earthquake Nucleation and Stopping Rupture Dynamics and Physics of the Earthquake Source

8 Ground Motion Deconvolution

9 Understanding Site Effects Using Downhole Array Observations

10 Understanding Site Effects and Soil Behavior Using Surface and Borehole Observations

11 Understanding Site Effects Using Surface and Borehole Observations

12 NOAH Wave Propagation NOnliear Anelastic Hysteretic finite difference code Strain space multi-shear mechanism (Towhata & Ishihara, 1985; Iai et al., 1990) Undrained Condition

13 Understanding Site Effects Using Surface and Borehole Observations

14 UC Riverside Library Station Site Characterization Drilling, SPT Pitcher Tube Sampling Logging Lab Testing Borehole Installation & Network Integration

15 UCR Site Characterization Validation Archuleta et al., 2000

16 UC/CEP Multi-Disciplinary Project Scenario Earthquakes UC Riverside Empirical Greens Function Finite Fault Simulation Cross section Map view Archuleta et al., 2000

17 UCR EGF Estimates and UBC, PSHA, DBE These types of studies could become state-of-the-practice with an integrated strong motion, downhole array, geotechnical site characterization, and structural array database. Archuleta et al., 2000

18 Database Structure, Dictionary, & Formatting Examples Garner Valley Downhole Database COSMOS VDC Database

19 Garner Valley Downhole Array Database Strong- & weak-motion 5 Tables 1162 Events 23 Instruments 102 Channels Over 30,000 Accelerograms Garner Valley DataBase Table: Event Table: Trace Column: Datatype: Column: Datatype: Constraint: *event_code varchar _ *filename varchar year integer _ **event_code month integer npoints integer >0 day integer samp_rate integer >0 hour integer min_value varchar min integer max_value varchar sec real edistance real >0 magnitude real azim real 0<=val<=360 latitude real back_azim real 0<=val<=360 longitude real peakval varchar depth real trigger_time integer 0<=val<=60 _ **err_flag Table: Error _ **chan_name Column: Datatype: *err_flag integer _ message varchar Table: Channel Column: Datatype: Constraint: Table: Station _ *chan_name varchar Column: Datatype: _ **err_flag *sta_name varchar **sta_name depth real tustin_chan integer 0<=val<=96 inst_type varchar sac_chan integer 1<=val<=6 beg_date date segy_chan integer 0<=val<=96 end_date date gain integer >0 geol varchar vertical integer 0<=val<=180 sta_loc varchar horizontal integer 0<=val<=360 sta_lat real serial_no varchar sta_long real sensitivity real >0 sta_elev real natural_freq real >0 sta_comments varchar damp_ratio integer 0<=val<=100 component varchar * = primary key chan_comments varchar ** = foreign key

20 Simple search page for the GVDA database WWW Interface Advanced search is currently only available with command line SQL queries

21 Example of the future downhole array database structure Strong Motion Data COSMOS VDC Database Structure 12 Tables 199 Earthquakes 1744 Stations 11,537 Accelerograms

22 Advanced Search - Choose Parameters Select the database parameters that you wish to se COSMOS VDC Advanced Search Page Search on any parameter or combination of parameters in the tables Event Parameters Event Code Event Date Earthquake e Nam Event Latitude (North) Event Longitude (West) Event Depth (km) Preferred Magnitude Moment Magnitude Surface MagnitudeLocal Magnitude Other Magnitude St r i k e Ra k e Region Parameters Re g i o n Seismic Moment Dip Mechanism Station Parameters Station Name Location Address Agency Number Auxillary Location Ge o l o g y Los Angeles Basin California Geology Geology S-wave velocity V30 St a t u s Structure Web Address

23 APPE N DIX B : COSMOS VDC DA TA FORMA T AD NDICTION A RY Data Dictionary & Formatting Details Table B1: Network Column: Dataty pe: D i ctionar y *net_id integer Networ k ID ndex i net_name var char Networ k name owner var char Networ k owner url var char U RL for networ k web s ite net_ac ronym var char Networ k acron ym last_update time stamp Last update time for network ID Table B2 Event Column: Dataty e: D i ctionar y event_name var char E vent name event_code char E vent code *event_id integer E vent ID ndex i event_date datetime E vent date event_lat dec i mal E vent latitude event_long dec i mal E vent longitude event_depth dec i mal E vent depth best_mag dec i mal Best magnitude moment_mag dec i mal Moment magnitude surface_mag dec i mal Surfac e wave magnitude local_mag dec i mal Loc al networ k magnitude other_mag dec i mal Open magnitude field sei smi c_moment real Sei smi c moment region_id char E vent region ID strike decimal E vent fault stri ke dip dec i mal E vent fault dip ra ke dec i mal E vent s lp i rake me chani sm var char E vent mechani s m type last_update time stamp Last update time for ev ent ID Table B3: Region Column: Dataty pe: D i ctionar y *region_id char Region ID ndex i region_name var char Region name last_update time stamp Last update time for region ID

24 Seismological Representation Theorem u(x,t) = s(ζ,t) δg(ζ,x,t-τ)/δζ Seismology Future Engineering Engineering Representation Theorem υ(dv) = G DV DM dg DM IM dυ(im) PEER Framing Equation for Performance Based Design

25 Downhole Arrays Future Development Include multiple downhole arrays in a database with the COSMOS VDC database structure California data, US, International.. Integration - Geotechnical and Earthquake Engineering VDC? Coordination of efforts into a coherent program. Develop a broad coordinated funding base. Create an interface between individual databases that includes dissemination and visualization tools. A Internet Technology Research (ITR) Program that is focused on Geotechnical and Earthquake Engineering needs?