Guidance on the utilisation of ground motion simulations in engineering practice
This poster presents ongoing work to develop guidance on the utilization of ground motion simulations for engineering practice. The two central ideas in the guidance are, firstly, the indended use of the simulations: For hazard analysis and/or providing ground motion records for use in seismic response analysis of engineered structures. Secondly, a heriarichal validation matrix to systematically develop predictive confidence in the simulated motions in generic regions through to site-specific applications. There are two principal manners in which simulated ground motions can be utilized: In determination of the seismic hazard: Most rigorously, the seismic hazard would be directly obtained from ground motion simulation-based PSHA (e.g. CyberShake). Alternatively, simulations can inform the functional form in empirical ground motion models. Ground motions for seismic response analysis: Simulated ground motions can supplement existing empirical (as-recorded) ground motion databases (e.g. for large Mwsmall Rrup cases which are poorly represented). Target amplitudes can be defined from traditional or simulation-based PSHA, or a code-based response spectrum.