Three objectives are set for this year: (1) The development and implementation of probabilistic seismic hazard model for multi-sites with consideration of spatial variation of ground motions; (2) The refinement of the methodology to calculate seismic fragility of water supply systems based on a combination of Monte Carlo simulation and hydraulic network analysis for damaged systems; and (3) The...

Abstract The seismic vulnerability of bridges may be reduced by the application Geotechnical Seismic Isolation (GSI) below foundations columns and abutments. However, role GSI on response has been limitedly examined in literature. Therefore, this research conducted to study effect applying address aforementioned gap knowledge. Advanced nonlinear dynamic three-dimensional finite element analyses...

Finite element analysis is one of the key steps in evaluating effectiveness an isolation system. The aim this paper to research mechanical properties sliding and rolling friction systems their application for isolating frame structures. A hybrid seismic system proposed, which aims protect superstructure by reducing dynamic response. effect different parameters on coefficient bearing was tested ...

Computer-aided fault imaging and interpretation is a fundamental tool for subsurface structure characterization and modeling, and the existing methods are primarily based on seismic discontinuity analysis (e.g., coherence and semblance) that evaluates the lateral variation of waveform and/or amplitude. However, such attributes have a limited resolution on subtle faults without apparent displace...

Experimental proof is provided of an unconventional seismic design concept, which is based on deliberately underdesigning shallow foundations to promote intense rocking oscillations and thereby to dramatically improve the seismic resilience of structures. Termed rocking isolation, this new seismic design philosophy is investigated through a series of dynamic centrifuge experiments on properly s...

This paper conducts a detailed review of the seismic hazard, inventory, bridge vulnerability, and bridge retrofit practices in the Central and Southeastern United States CSUS . Based on the analysis of the bridge inventory in the CSUS, it was found that over 12,927 bridges 12.6% are exposed to 7% probability of exceedance PE in 75-year peak ground acceleration PGA of greater than 0.20 g, and ne...

Recent Italian earthquakes have shown the high seismic vulnerability of pallet racking systems. In down-aisle direction and in absence bracing systems, these structures are very flexible moment-resisting frames. Instead, cross-aisle they consist slender trusses, stiffened by various systems; latter, although necessary for lateral stability, attract significant accelerations, which can cause sto...

The goals of seismic impact assessment can be achieved by seismic monitoring systems and seismic impact simulator. Seismic monitoring system, for the purpose of hazard analysis, local site effects analysis, vulnerability analysis, and estimation of loss, is one application of SHM in earthquake engineering. A prototype, conceptual seismic impact simulator integrating SHM, FEM, GIS, and Virtual R...

The main purpose of this work is to compare different criteria for the seismic strengthening of r.c. framed buildings in order to find the optimal combinations of these retrofitting techniques. To this end, a numerical investigation is carried out with reference to the town hall of Spilinga (Italy), a r.c. framed structure with an L-shaped plan built at the beginning of the 1960s. Five structur...