D1.1: Activity plan.
Planning of research, test and technological implementation activities. Project management ensures effective financial, scientific and technical coordination, keeping the project focused on primary objectives by means of adequate project planning and continuous evaluation of Project progress.
D1.2: Technology implementation plan.
Technology implementation plan consists of 5 phases:
1. Site selection from the National Accelerometers Network (NNA) (WP2).
2. Complementary field work (geotechnical and engineering geology) and lab tests (WP2 and WP4).
3. Geophysical survey (WP3).
4. Correlation of laboratory and in situ physico-mechanical parameters with geophysical parameters (WP5).
5. Normalized elastic spectra for construction planning (WP6 and WP8).
D1.3: Technical periodic reports.
The technical periodic reports are annual and describe the progress of the on-going WPs including information about the completed deliverables. Two periodic reports have been prepared.
More specifically, the first one reports on the progress of the work packages WP1, WP2, WP3, WP4, WP5, WP6 and WP7 until 31/12/2013. Also, this report summarizes the completed deliverables D1.1, D1.4 and D3.1. Within the framework of WP9 (deliverable D9.4, starting date 1/10/2014), three publications have been completed, two presentations at international conferences (best presentation award) and one paper in a peer reviewed journal.
Within the second periodic report the progress of WP1, WP2, WP3, WP4, WP5, WP6, WP7, WP8, WP9 and WP10 is included until 31/12/2014. Also, this report summarizes the completed deliverables D2.1, D2.2 and D3.2.
D1.4: Financial intermediate report.
The Intermediate Financial Report focuses on the expenditures from the beginning of the project up to the 15th December 2013. These expenditures were low (20.96% of the budget) due to the delay in the approval of the drilling cost.
D2.1: Geotechnical report (including relevant technico-geologic maps).
Complementary geotechnical fieldwork conducted within the framework of D2.1 for the site characterization at the strong motion sites of the Hellenic Accelerometric Network in Crete, included the following:
A) Collection and evaluation of the existing geotechnical and engineering geological data from the archives of the Institute of Geological and Mineral Exploration, the Central Public Works Laboratories and private geotechnical companies.
B) Detailed geological mapping in the vicinity (within 250m) of thirteen strong motion HAN sites in Crete, at a scale of 1:2000.
C) Study of the neotectonic activity.
Six boreholes were drilled for the study of geotechnical characteristics of the formations around selected strong motion sites of HAN in Crete. This study included the selection of representative core samples for lab tests, the lithological description of core samples and a number of in situ tests such as SPT and MAAG for the evaluation of the geotechnical parameters .
D3.1: Report on the description of the selected areas.
WP3 involves the selection of the pilot sites for the application of the proposed methodology. Initially, we proposed 17 sites of the HAN on Crete. The site selection criteria included:
- Amount and quality of records with seismic events
- Sites located at urban areas
- Sites located at outcropping rocks
- Availability of geophysical/geotechnical data
- Drilling a borehole at distance less than 100-150 m from the site
- Conducting geophysical survey at distance less than 100-150 m from the site
The number of pilot sites was initially set to ten (10). For safety reasons three more sites were selected and at Chania (CHN2), at Palaiochora Chania (PLC1), at near Rethymnon the Archaeological Museum (RTHE) and near the Hospital (RTH1), at Siva Herakleion (SIVAS), at Herakleion near TEI-CRETE Herakleion (HER1) and Herakleion city center (HER2), at Giofyros Herakleion (HER3), at Agios Nikolaos near the City Hall (AGN1) and near the National Telephony Company building (AGNA), at Sitia near the City Hall (SIT2) and near the National Telephony Company building (SIT1) and at Zakros (ZKR).
D3.2: Geophysical processing and interpretation report.
Geophysical experiments for the selection of the most appropriate acquisition parameters as well as one and two dimensional geophysical techniques have been performed. Following geological mapping, geophysical measurements were acquired in the vicinity (within 50m) of the selected strong-motion stations. The seismic methods of active source Multichannel Analysis of Surface Waves (MASW) and passive source Microtremor Array Measurements (MAM) provided information about the VS30 for the areas under investigation. From the available seismic, geoelectrical and electromagnetic data, subsurface models were constructed for the selected sites where permanent strong motion stations of HAN are installed on Crete.
D4.1:Laboratory tests report.
This deliverable describes the results from laboratory tests on selected core samples or samples from open excavations for both soils and rocks for the determination of the physico-mechanical parameters. Representative core samples from each lithostratigraphic unit undergone a number of lab tests for the evaluation of the geotechnical parameters such as Gmax, ν, E, Vp, Vs, qu and c’.
D5.1:Empirical equations relating geophysical parameters (resistivity, seismic velocity) with geotechnical parameters.
WP5 employs data collected during the geotechnical and engineering-geological field work (WP2), geophysical survey (WP3) and laboratory tests (WP4).
This deliverable involves the classification of geophysical, geological and geotechnical data from the sites PLC1, CHN2, RTH1, SIVA and SIT2. Initially, the algorithms of K-means and neural networks (SOM-Self Organizing Maps) classified seismic tomography and electrical tomography data. SOM-Self Organizing Maps classification technique controls better the organization of points in a multi dimensional scatter plot and it was selected to classify the geophysical data in 6 and 12 classes. These classes were correlated with geotechnical and geological data for the geotechnical interpretation of geophysical sections.
Additionally, cross plots appropriate for certain lithologies were employed for the geotechnical characterization of the subsurface. These cross plots correlate Vs, Nspt and cU.
D6.1: Report on the theoretical and experimental analysis of soil enforcement.
Comparisons were made between elastic response spectra according to EC8 and observed spectral values, which have been recorded by accelerographic instruments installed in the Chania, Heraklion, Agios Nikolaos and Sitia sites in Crete. In these comparisons, the observed spectral values were derived from accelerograph records of strong intermediate depth earthquakes. In most cases, the observed spectral values are not in agreement with the EC8 spectral ones. The only exception is the Sitia stations SIT1 and SIT2, where observed and normalized corresponding EC8, spectral shapes are similar. The persistence of medium to long period (0.5 sec – 2.0 sec) spectral amplitudes that surpass the corresponding normalized EC8 elastic spectra is an indication of significant divergence of observed data from seismic actions proposed by the code. This difference may be due either to source effects or to a combination of source, path and site effects.
This deliverable is a web-database containing geophysical and geotechnical data as well as seismic events records from HAN sites. An updated strong motion record database was developed for the broader Aegean area using data from the national strong motion network. This database is comprised of high-quality and efficiently processed strong motion recordings as well as of updated and more accurate metadata information such as, source parameters (magnitude, fault plane solutions etc) and site characterization (Vs30 for most of the sites of the network).
D7.2: Technical description of the buildings hosting the accelerometers network of the HAN network on Crete.
This deliverable describes the assessment of the seismic vulnerability of the buildings that house the stations and the evaluation of the effect of the building’s response on the recorded excitation at its base. A multi-stage building investigation methodology was developed including a first-stage rapid visual screening (RVS) procedure. The results of the RVS investigations led to a quantification of the seismic vulnerability of each inspected building, allowing the prioritization for more detailed, second-stage inspections. Data sheets, photos and drawings are incorporated and accessed from a GIS database which contains a comprehensive ‘structural profile’ of each building that can be used for future investigations beyond the scope of the current research effort.
D7.3: Technical report including records of large seismologic events and their normalized response spectrum.
Intermediate depth seismic events highlighted due to their relation with the African plate and extended damages on Crete. Simulation for similar seismotectonic environments utilizing seismotectonic models of the south Aegean arc.
D8.1: Normalized elastic spectra
Derived and proposed normalized elastic spectra for construction planning in Crete and comparison with the ones from Greek Seismic Code 2000 and EC8.
D9.1: Web page.
D9.2: Brochures and CDs.
Kouli, M., Loupasakis, C., Soupios, P., Rozos, D., Vallianatos, F. (2014) Landslide susceptibility mapping by comparing the WLC and WofE multi-criteria methods in the West Crete Island, Greece. Environmental Earth Sciences, Springer, Article in press, DOI 10.1007/s12665-014-3389-0.
Savvaidis A., Margaris B., Theodoulidis N., Lekidis V., Karakostas Ch., Loupasakis C., Rozos D., Soupios P., Mangriotis M-D., Dikmen U., Tsangaratos P., Kokinou E., Vafidis A., Rondoyanni Th., Kalogeras I., Koutrakis S., Sarris A., Papadopoulos N. (2014) Geo-Characterization at selected accelerometric stations in Crete (Greece) and comparison of earthquake data recordings with EC8 elastic spectra, Central European Journal of Geosciences, Versita-Springer, 6:1, pp 88-103.
Savvaidis A., Margaris B., Theodoulidis N., Lekidis V., Karakostas , Ch., Mangriotis M-D., Kalogeras I., Koutrakis S., Vafidis A., Steiakakis M., Agioutantis Z., Rozos D., Loupasakis C., Rondoyanni Th., Tsangaratos P., Dikmen U., Papadopoulos N., Sarris A., Soupios P., Kokkinou E., Papadopoulos I., Kouli M., and Vallianatos F. (2013) Geo-characterization according to recent advances of Eurocode (EC8). Proceedings of First International Conference on Remote Sensing and Geoinformation of Environment. (Best Paper Award)
Vafidis A., Steiakakis M., Agioutantis Z., Andronikidis N., Kritikakis G., Economou N., Pandi K., Spanoudakis N., Savvaidis A., Margaris B., Theodoulidis N., Lekidis V., Karakostas Ch., Mangriotis M-D., Kalogeras I., Koutrakis S., Rozos D., Loupasakis C., Rondoyanni Th., Tsangaratos P., Dikmen U., Papadopoulos N., Sarris A., Soupios P., Kokkinou E., Papadopoulos I., Kouli M., and Vallianatos F., (2013). “GEO-CHARACTERIZATION” of selected areas in Crete, Greece, towards realistic assessment of seismic design actions. Proceedings of the 13th International Congress of the Geological Society of Greece, Bulletin of the Geological Society of Greece, vol. XLVII, Pre-Congress Proceedings’ CD – Paper Number 326.
Kaitantzian A., Loupasakis C., Rozos D. (2014) Assessment Of Geo-hazards Triggered By Both Natural Events And Human Activities In Rapidly Urbanized Areas. Proceedings of 12th International IAEG Congress IAEG XII – Engineering Geology for Society and Territory.
Karakostas Ch., Savvaidis Al., Lekidis V., Margaris B., Theodoulidis, N., Vafidis A., Loupasakis C., Soupios P., Papadopoulos N. (2014) A proposal for accelerometric station validation procedures : application to representative sites in Crete (Greece). Second European Conference on Earthquake Engineering and Seismology.
Kouli, M., Loupasakis, C., Soupios, P., Rozos, D., Vallianatos, F. (2014) “Comparing multi-criteria methods for landslide susceptibility mapping in Chania Prefecture, Crete Island, Greece” , Natural Hazards and Earth System Sciences.
A. Savvaidis, G. Kritikakis, I. Papadopoulos, N. Papadopoulos, U. Dikmen, M.D. Mangriotis , P. Soupios & A. Vafidis (2014) Different Processing and Inversion Methods for Resolving Vs Profiles in Engineering Geophysics Using Surface Wave Data. 20th European Meeting of Environmental and Engineering Geophysics – Athens, September 2014, electronic proceedings Mo PA1 04.
Loupasakis C., Tsangaratos P., Rozos D., Rondoyianni Th., Vafidis A., Kritikakis G., Steiakakis M., Agioutantis Z. , Savvaidis A., Soupios P., Papadopoulos I., Papadopoulos N., Sarris A., Mangriotis M-D. and Dikmen U., (2015) Cross validation of ge otechnical and geophysical site characterization methods. near surface data from selected accelerometric stations in Crete (Greece). Proc. of RSCy 2015 – Third International Conference on Remote Sensing and Geoinformation of Environment. Ed: Hadjimitsis D., Themistocleous K., Michaelides S., Papadavid G., Proc. of SPIE Vol. 9535, 95351T-1.
Loupasakis C., Tsagaratos P., Rozos D., Rondoyanni Th., Vafidis A., Steiakakis M., Agioutantis Z., Savvaidis A., Soupios P., Papadopoulos I., Papadopoulos N., Sarris A., Mangriotis M-D, Dikmen U.f, (2015) Near surface geotechnical and geophysical data cross validated for site characterization applications. The cases of selected accelerometric stations in Crete island (Greece). EGU General Assembly 2015, Geophysical Research Abstracts, Vol. 17, EGU2015-7442.
Tsangaratos P., Loupasakis C., Rozos D., Rondoyanni Th., Vafidis A., Savvaidis A., Soupios P., Papadopoulos N., Sarris A., (2015) The importance of geological data and derived information in seismic response assessment for urban sites. An example from the Island of Crete, Greece. EGU General Assembly 2015, Geophysical Research Abstracts, Vol. 17, EGU2015-13047.
Loupasakis C., Tsagaratos P., Rozos D., Vafidis A., Steiakakis M., Savvaidis A., Soupios P., Papadopoulos I., Papadopoulos N., Sarris A., Mangriotis M.-D., Dikmen U. (2015) Site characterization of selected accelerometric stations’ sites in Crete island (Greece) founded on rock and soft rock formations. Proc. of 11th EURO-conference on Rock Physics and Geomechanics 2015, pp.75.
D10.1: Final report.