One of the problems faced by civil engineers is the proper design of structures. In the Ecuadorian standard NEC-SE-DS where the seismic hazard is quantified, there is a soil typology identified as F1 in which it is established that when in the geotechnical profile there are soils that under seismic action are susceptible to liquefaction, particular studies must be carried out to evaluate the dynamic response of the profile and establish the spectral shape and the horizontal acceleration coefficient to be used in the design. The present research will analyze the dynamic response of potentially liquefiable loose sands using the Cyclic 1-D program, which allows to consider the increase of pore pressure under seismic action, the decrease of effective stresses in the soil and consequently the reduction of shear resistance, as well as the change of stiffness and damping with deformation. For this purpose, lithological profiles were defined of loose liquefiable sands, of variable thickness between 5 and 30 m, which were subjected to instrumental earthquakes of variable intensity, frequency and duration, which defined the design spectra as a function of the level of seismic acceleration.
|Translated title of the contribution||Response Spectrum of Liquefiable Loose Sands-Profile F1 (Seismic Hazard)|
|Original language||Spanish (Ecuador)|
|Title of host publication||Specter response from loose sand liqueforable-profile F1 (seismic danger)|
|State||Published - 30 Aug 2019|