Crimson Publishers-Civil Engineering Journal

Recovery Period of Fluvial Sediment Transport after a Major Earthquake - Crimson Publishers Recovery Period of Fluvial Sediment Transport after a Major Earthquake by Guan-Wei Lin* and Hsien-Li Kuo in Advancements in Civil Engineering & Technology Fluvial sediment transport reflects the rate of geomorphic change in river catchment. By retrospection long-term observation data of fluvial sediment, the recovery period of sediment transport after a large earthquake can be assessed. We proved that the recovery period in a given catchment is positively correlated with the peak ground motions triggered by an earthquake. The correlation indicates that a recovery period of more than four years is required if a catchment is affected by an earthquake with a ground acceleration greater than 400gal. Major earthquake is an important factor for sediment yield, especially within a few years after a large earthquake. Therefore, within a few years after a major earthquake, fast geomorphic...

Experimental Calculation of the Damping Ratio In Buildings Hosting Permanent GPS Stations During the Recent Italian Earthquakes - Crimson Publishers Experimental Calculation of the Damping Ratio In Buildings Hosting Permanent GPS Stations During the Recent Italian Earthquakes by Marco Gatti in  Civil Engineering During the recent earthquakes in Italy, the contemporary presence of about 40 permanent GPS and 40 accelerometric stations of the national seismic network made it possible to estimate the value of the damping ratio of the buildings hosting the GPS stations. This value was calculated as the minimum of a function (parabola) constructed step by step from the relations between the ordinates of the pseudo-acceleration spectra extracted from the GPS and accelerometric measurements. For both construction material and building geometry, the results indicate values that differ by at least two percentage points from the values imposed by the technical regulations. https:/...