PBSDOS · Performance based seismic design of structures
FP6 — Marie Curie Actions (Human Resources and Mobility)
- Duration
- 2005-08-01 → 2007-01-31
- EU contribution
- €156,097
- Participants
- 1
- Scheme
- IIF
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Results in brief
Final Activity Report Summary - PBSDOS (Performance based seismic design of structures)
The objective of the project PBSDOS was to develop and validate an integrated methodology for the performance based seismic design and evaluation of structures, which explicitly accounted for multiple performance objectives with respective acceptable design spectra, based on rates of exceedance of performance levels and, eventually, on risks or target reliabilities. The research emphasis was on reinforced concrete buildings and highway bridges, focussing particularly on three-dimensional asymmetric buildings and bridges subjected to bi-directional earthquake action. To achieve this objective there were a number of tasks that needed to be carried out including: 1. investigation and systematic consideration of uncertainties, random and epistemic, that were relevant to this problem, e.g. those present in the evaluation of seismic hazard and the approximation involved in simplified non-linear methods of analysis used to predict the response, seismic damage and performance of structures; 2. improvement, validation, calibration and generalisation of the preliminary version of a performance based seismic design procedure previously suggested by the grant holder, which was essential for the application of the performance based seismic design methodology to three-dimensional structures subjected to multi-directional shaking; and 3. practical implementation of the resulting methodology placing special emphasis on the reduction of uncertainties attributed to the design methodology and the development of procedures and computational design tools whose use had to be straight ward in order to be easily utilised and appreciated by the profession. The method was developed by taking advantage of the experimental results obtained at the European laboratory for structural assessment, for irregular buildings and irregular bridges in particular, in close collaboration with the staff and the members of the research network 'LessLoss'.
Data: CORDIS, © European Union
Project objective
Structural damage and life losses due to recent earthquakes show that design procedures in current codes throughout the world need to be improved to adequately consider the non-linear behaviour of the structures and control their performance when subjected to demands which may occur during their design life. This proposal addresses the problem of defining a consistent performance based seismic design methodology and developing design methods which guarantee that, under design actions, the structures perform as expected.The project involves: Definition and validation of seismic design and performance levels applicable to structures in Mexico and the EU using field and experimental damage data and probability concepts. Validation of a recently proposed design method based on concepts of structural performance evaluation, an approximate non-linear procedure for the determination of seismic performance, and advanced concepts on dynamics and probability. Improvement and modification of this method to consider the design of asymmetric buildings and irregular bridges subjected to bidirectional earthquake action. Development of uniform hazard design spectra using a probabilistic formulation based on rates of exceedence of the performance indices. The procedure to obtain these spectra will consider all known uncertainties on the parameters of the seismic sources, their annual rate of exceedence of magnitudes and the characteristics of the structures.To calculate the probability that a structure exceeds a given performance level, the Monte Carlo method will be used with the responses of equivalent single degree of freedom systems subjected to a large number of records of different magnitudes simulated for particular earthquake generation processes and methods such as the empirical Green ' s function. Once the method is developed, and only after an extensive validation programme, discussions and presentations will start with EC8 committees for future code implementations.
Original text from CORDIS.
Participants
- COMMISSION OF THE EUROPEAN COMMUNITIES - DIRECTORATE GENERAL JOINT RESEARCH CENTRE - JRC · BRUSSELSCoordinatorCity levelBelgium
Links
Data: CORDIS, © European Union