Rainbow bridge



This project aims at developing the necessary technical resources and an integrated methodology to take into consideration the effects of long period ground motions on the response of large-scale infrastructures.

It involves five partners with extensive experience in implementing activities of different type and complexity, such as data and signal processing, geophysical characterization, numerical methodologies and algorithms, modeling of stochastic processes, structural modeling and performance based design procedures.

The general objectives of the project are:

  • Systematic study of surface waves characteristics: dispersion, non-stationarity, duration, etc.
  • Development of a stochastic model for long-period ground motion linked to the physical parameters of sedimentary basins and the seismic input.
  • Implement the stochastic model to generate synthetic large-band ground motion.
  • Evaluate the seismic performance of large-scale infrastructures excited by generated broadband ground motion.



    This project aims at developing a physical model for surface waves based on a systematic analysis of strong ground motions recorded on the floor of sedimentary basins using evolutionary stochastic processes. The stochastic model will then be superimposed to standard simulations of body waves (to generate time histories as shown schematically in the figure below) for the performance-based reliability assessment of large-scale structures, with emphasis on the effects of resonance and exposure to excitation of longer duration.

    wave types
    Schematic of the composition of an acceleration record.