Ingeniería Civil-Pregrado

Permanent URI for this collectionhttps://dspace-test.ucuenca.edu.ec/handle/123456789/36

Browse

Browsing Ingeniería Civil-Pregrado by Subject "Aceleraciones de piso"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Efectos de aislamiento de base elastoméricos en las aceleraciones de piso de una estructura para componentes no estructurales
    (2018) Lasso Lazo, Edgar Patricio; Vázquez Flores, Fabricio Andrés; Flores Solano, Francisco Xavier
    Nowadays in Latin America, non-structural components (NSC) do not get as much importance as they should within seismic design codifications. This added to the lack of seismic protection systems, increase the probability of damage on NSCs during an earthquake. In the past, during the events of USA (1994), Japan (1995) and Chile (2010), neglecting the NSCs from seismic designs led to significant economic losses. This losses were due to primarily: 1) the cost of inoperativeness post-event and 2) the replacement of expensive equipment. For this reason and in order to prevent a similar scenario, this thesis has the goal to quantify the effectiveness of using an elastomeric base-isolation system on floor accelerations for NSC within the structure, compared to a non-isolated structure. Floor accelerations are the base input to calculate demands on rigid and flexible NSCs. To calculate demands on flexible and rigid NSCs, the Floor Response Spectrum (FRS) and Peak Floor Acceleration (PFA) methods were used respectively, both consist of a time-history analysis. This analysis was performed considering an elastic and inelastic behavior of the isolated and non-isolated structure. The results obtained show a reduction in acceleration of 87% when comparing the isolated and non-isolated elastic models, meanwhile a reduction of about 81% when comparing the inelastic models respectively. From the results obtained, it is concluded that the inclusion of isolation on the structure decreases in more than an 80% the demands of acceleration that affect NSCs within the structure. This also proves the effectiveness of using this type of seismic protective systems
  • Thumbnail Image
    Item
    Evaluación del comportamiento sísmico y aceleraciones de piso en pórticos de acero resistentes a momento, bajo la asignación de distintos factores de importancia
    (Universidad de Cuenca, 2021-03-11) Cepeda Loja, Jhon Marcelo; Vintimilla Ulloa, Jorge Eduardo; Flores Solano, Francisco Xavier
    The research is based on the analysis of steel special moment frames (SMF); for this purpose, two models are defined with the implementation of the seismic response spectrum of the ASCE / SEI 7-16 standard, designed with importance factors (I) of 1.0 and 1.5. The study analyzes the behavior of non-structural components (CNEs) sensitive to floor accelerations, which are affected by the variation of seismic design forces. The analysis considers that an increase in the (I) value causes bigger steel sections of the structural system, modifying the dynamic behavior of the building that affects CNEs included in the study models. Damage to CNEs causes economic and material losses, as well as possible obstruction of escape routes during a seismic event. This study uses a base model to establish the geometry and design live loads, according to the SEAOC IBC document (2012). With the geometry established in each study model, service design criteria are performed implementing the considerations of the ASCE / SEI 7- 16 standard, which defines the required steel sections of structural elements. Resistance checking and capacity-based design of structural elements are verified through ANSI / AISC code. With verified models, the PFA and FRS method is applied for checking the behavior of CNEs present on each floor of the building. The research results establish that CNEs have a more critical behavior in the model designed with a bigger (I) value; since the increase of this parameter causes greater floor accelerations, being evident in those zones where the CNE period equals the period of one of the structure's vibration modes.