Task 2.1: Definition of engineering requirements (LNEC, UPAV)
The main objective of this task is to ensure the compatibility of the SHARE hazard output specifications with the Eurocode 8 application requirements by conducting annual review meetings jointly with the CEN/TC250/SC8 Committee. A first meeting was planned in the DoW to serve to draft a hazard output specification requirement document; a second meeting to report progress; and a third meeting to review and validate hazard products.
The first activity towards fulfilling the objectives of this task was undertaken by LNEC, through the presentation of the SHARE project and in particular WP2 to the CEN/TC250/SC8 Committee in their annual meeting in July 2009. The next step was to organise a focus meeting with the EC8 Committee and LNEC and UPAV in January 2010 in Pavia which was attended by Eduardo Carvalho, Thomas Wenk, Alain Pecker, Michael Fardis as representatives of CEN/TC250/SC8 and WP4 and WP2 representatives from METU, LNEC and UPAV. The objective of this meeting was to discuss the hazard output requirements of EC8. Following this meeting Deliverable D2.1 was drafted by UPAV and LNEC and was shared with the EC8 committee for their feedback.
The main specifications can be summarised as follows:
The first activity towards fulfilling the objectives of this task was undertaken by LNEC, through the presentation of the SHARE project and in particular WP2 to the CEN/TC250/SC8 Committee in their annual meeting in July 2009. The next step was to organise a focus meeting with the EC8 Committee and LNEC and UPAV in January 2010 in Pavia which was attended by Eduardo Carvalho, Thomas Wenk, Alain Pecker, Michael Fardis as representatives of CEN/TC250/SC8 and WP4 and WP2 representatives from METU, LNEC and UPAV. The objective of this meeting was to discuss the hazard output requirements of EC8. Following this meeting Deliverable D2.1 was drafted by UPAV and LNEC and was shared with the EC8 committee for their feedback.
The main specifications can be summarised as follows:
- Hazard maps for a range of return periods between 25 and 5000 years for the median (from the logic tree) of PGA at a reference bedrock level.
- Hazard maps for return periods between 25 and 5000 years for median spectral ordinates (acceleration and displacement) on type A ground (reference bedrock) for a range of period ordinates (those covered by all GMPEs in logic tree)
- Hazard maps, for aforementioned return periods, of median F0, TB, TC*, at a reference bedrock level.
- Hazard maps, for the aforementioned return periods, for values of median PGV and median PGD (or appropriate proxies).
- Maps, for the aforementioned return periods, of median TD* (if possible) at bedrock level.
- Zonation Map for Europe based on PGA (EN 1998-1 3.2.1 (1)P, EN 1998-1 3.2.1 2), corresponding to the no collapse requirement (EN 1998-1 3.2.1 3).
- Zonation map for Europe considering both PGA and spectral shape PSHA disaggregation in terms of PGA and spectral ordinates (i.e. for the results of the maps of output 2). Note, the surface-wave magnitude (Ms) is needed as output of the disaggregation, though this may be obtained from a conversion of Mw.
- Estimation of “k” value1 (a parameter to allow for the scaling of hazard to intermediate return periods) for median hazard, and indication of uncertainty and applicable return period range.
- Portal with access for engineers to the above output (details to be determined between WP2 and WP6).
- Proposals for new spectral shapes for EN 1998 for both acceleration and displacement spectra.
- The final version of the deliverable was submitted in March 2010.
