http://www.uni-weimar.de

Lehre

Projekt Azur I

 http://www.edac.biz
http://www.edac.biz deutschenglish http://www.edac.biz

Regional Ground Motion Prediction and database (engl.)

(as Part of NHRE: “Seismic monitoring”)

 

(I) Overview and Motivation

Abb. 1 Schwarz et al. (2007), Schwarz et al. (2009)

Students have to be trained in the data elaboration and handling of ground motion records to come up with realistic (data-proven) and site-specific elastic design spectra. The target area corresponds to the home countries. The students have to contact national institutions and responsible authorities concerning the data availability. The outcome should be design spectra for the representative hazard and site categories (see Fig. 1)

 

The Tasks are specified in (II) for different Sub-Tasks (see the scheme below).

 

Sub-Tasks

Keywords and explanation of basic elements

Points of discussion and elements of presentation
Recommended procedure, required decisions and discussion of evaluation criteria
Check lists

 

 

(II) Specification of Tasks

The participants of the project should deal with the following tasks:

 

Task 1.1 − Identification of Primary input parameters (1): seismic action classes

Decision upon the Type of spectrum Comparable to Eurocode 8: Magnitude Ms ≥ 5.5: Type I; Ms < 5.5: Type II Location of major cities (⇒ Selection of Reference Sites)

Decision upon typical and relevant magnitude-distance categories Definition of seismic action classes (SAC)

 

 

Task 1.2 − (optional) Identification of Primary input parameters (2): subsoil conditions

Geological and topographical maps

Decision upon typical and relevant site categories Comparable to Eurocode 8: Table of ground classes (⇒ script Seismic Monitoring) Check of national code and applied classification schemes

 

 

Task 2 − Ground Motion Prediction Models (GMPE)

Selection of ground motion prediction equation (GMPE) for the study area: Peak Ground Acceleration (PGA) - rock Spectral Acceleration

GSHAP input parameters for regional centers and Publications Database for code spectra

 

 

Task 3.1 − Ground Motion Data and Records (1): Data Collection (check of availability)

Elaboration of a representative database of ground motion records Decision on appropriate Ground Motion Prediction Equations (GMPE) [if not otherwise defined, GMPE should be taken from Annex]

Search for National or International Data Centers Search for Database and National Weak and Strong Motion Networks GIS-based illustration of available information for the study area (location of recording stations, subsoil conditions according to geological maps etc.)

 

 

Task 3.2 − Ground Motion Data and Records (2): Elaboration and data handling

Time Histories and Response spectra

Acceleration response spectra for horizontal and vertical components Time-History related parameters (Arias-Intensity IA, strong motion duration ts, Cumulative Absolute Velocity CAV) Comparison of spectra for these SAC being of relevance for study area Site amplification (normalization to PGA = 1.0 g)

 

 

Task 4.1 − Application of ground motions models and tools to the study area (1): GMPE

Prediction of site specific spectra using different GMPE Comparison of results and definition of final output

Discussion of spectrum shape and smoothing procedures

 

 

Task 4.2 − (optional) Application of ground motions models and tools to the study area (1): Statistical Procedures following EC 8 approach (cf. Schott and Schwarz, 2004)

Statistical Elaboration of database including - regional data - data from EMSD, NGA and other databases

Fractiles of spectra and spectral amplification

 

 

Task 5 − Presentation of results

⇒ (III) Deliverables

USE - Keywords and explanation of basic elements - Points of discussion and elements of presentation - Recommended procedure   COMPARE the Tables for the different Sub-Tasks as Templates and TAKE them as Check list for the completeness

 

 

 

(III) Deliverables (Results)

National Database:

Institutions, Networks, Overview of activities and requests

Maps:

Earthquakes (epicenters) and locations of major cities

Ranking of seismicity and definition of reference site(s)

Records:Time histories, spectra, amplification
Database:Composition of database (Magnitude-Distance)

Ground Motion Prediction Equation:

Decision about appropriateness of existing proposals

Design Ground Motion:

Design Spectra for reference site (rock) and different subsoil conditions

Comparison with code spectra

 

 

 

References

Ambraseys, N.N., K.A. Simpson, and J.J. Bommer (1996):
Prediction of horizontal response spectra in Europe. Earthquake Engineering and Structural Dynamics 25, 371–400.

Ambraseys, N.N., J. Douglas, S.K. Sarma, and P.M. Smit (2005):
Equations for the estimation of strong ground motions from shallow crustal earthquakes using data from Europe and the Middle East: Horizontal peak ground acceleration and spectral acceleration. Bulletin of Earthquake Engineering 3(1), 1–53. 

Douglas, J. (2003):
Reissue of ESEE Report No. 01-1 `A comprehensive worldwide summary of strong-motion attenuation relationships for peak ground acceleration and spectral ordinates (1969-2000)` with corrections and additions. Department of Civil and Environmental Engineering. Imperial College London. 03 September, 2003.

Schott, C. ,and J. Schwarz (2004):
Reliability of Eurocode 8 spectra and the problems of their applicationto Central European earthquake regions. Proceedings of the 13th World Conference on Earthquake Engineering (WCEE), Vancouver/ Canada 2004. Paper No. 3403.

Schwarz, J., C. Ende and D.H. Lang (2005):
Site-dependent ground motion data recorded by German TaskForce in Turkey. In: P. Gülkan and J.G. Anderson (eds.), Directions in Strong Motion Instru­men­tation. 2005 Springer, 223–239.

Schwarz, J., Lang, D.H., Kaufmann, Ch., and C. Ende (2007):
Empirical ground-motion relations for Californian strong-motion data based on instrumental subsoil classification. 9th Canadian Conference on Earthquake Engineering, Ottawa, Ontario, June 25-29, 2007, Paper 1359, 12 pp.

Schwarz, J., Golbs, Ch., Kaufmann, Ch, and G. Roth (2009):
Site-specific ground motion models for soil sites with thick sedimentary layers. 20th International Conference on Structural Mechanics in Reactor Technology (SMiRT 20) Espoo, Finland, August 9-14, 2009 SMiRT 20-Division VII, Paper 1795, 10 pp.