The estimation of the maximum design responses according to the current Peruvian technical standard NTE E.030 is carried out considering seismic action as unidirectional. The design spectral acceleration parameters are based on Ground Motion Models which use the geometric mean of the EW and NS earthquake components to define the horizontal component of acceleration, which is always less than the maximum component; hence they are on the unsafe side. Furthermore, even with the correct seismic intensity, the simultaneous action of both components may result in larger demands than those computed by considering only one component at a time. Buildings that would be most affected would be those with torsional irregularity. In this article the most used definitions of horizontal seismic component have been revised, comparing seismic records of events from subduction sources. Then, using both rec...

The social, economic, and environmental consequences of the failure of an arch dam make it essential to evaluate its dynamic response to mitigate the risk of a disaster. Since the slenderness and flexibility of these dams tend to increase the fluid-structure interaction during an earthquake, this work compares the dynamic response of a hypothetical arch dam in the Marañón river, in northern Perú, for both full and empty-reservoir conditions. Three formulations were used to estimate the hydrodynamic pressures: Westergaard’s added mass, Eulerian and Lagrangian. The comparisons were performed for earthquakes of distinct seismogenic sources, previously matched to a uniform hazard spectrum with a return period of 10000 years. The finite element method was used to derive the seismic demands of the dam-reservoir-foundation system in COMSOL Multiphysics software, carrying out time-history a...

This paper aims to study the efficiency of energy dissipators, both fluid viscous and hysteretic, to improve the seismic responses of buildings. To quantify the ability of energy dissipators to reduce seismic responses, a series of time history analyzes were carried out on simplified models of buildings. Said simplified models consist of masses and springs with linear and elastic behavior whose properties are obtained from a shear beam model, joined by link elements with non-linear behavior to simulate energy dissipators. The main study parameters that were considered are the fundamental period of the structure without seismic control devices and the objective reduction factor. Likewise, a procedure is proposed for the dimensioning of the hysteretic dampers that will be incorporated into a building. On the other hand, the main building of the Lima airport was used as a case study, for wh...