Extensive Seismic Investigation To Determine Bedrock Depth And Dynamic Soil Properties For 1d Site Response Analyses In The Heart Of Rome

Data from an intensive soil investigation within the 1876 large complex of the Italian Ministry of Economy and Finance are presented and discussed. The investigation aimed at obtaining subsoil data for a preliminary 1D site response analysis, part of an initial study of the seismic vulnerability of this extended structure in central Rome. Attention focuses on the results of down hole and cross hole tests, performed with different techniques, dynamic laboratory tests, microseismic tremor records. In situ and laboratory tests have been interpreted to obtain shear wave velocities with depth, define the cyclic response of different soils, estimate the depth to bedrock. The results of the 1D site response analyses are examined as a preliminary estimate of the effects of soil variability on the distribution of seismic actions around the building.