Case Study of a Heavily Damaged Building during the 2016 MW 7.8 Ecuador Earthquake: Directionality Effects in Seismic Actions and Damage Assessment

In this work, the directionality effects during MW 7.8 earthquake, which occurred in Muisne (Ecuador) on 16 April 2016, were analyzed under two perspectives. The first one deals with influence of these seismic intensity measures (IMs), while second refers to assessment expected damage a specific building located Manta city, Ecuador, as function its azimuthal orientation. records strong motion 21 accelerometric stations used analyze actions. At closest station epicenter (RRup = 20 km), peak ground acceleration was 1380 cm/s2 (EW component APED station). A detailed study response spectra ratifies importance and confirms need consider hazard studies. Differences between IMs values that those obtained from as-recorded accelerograms are significant they agree studies carried out other regions. Concerning variation respect orientation, reinforced concrete building, seriously affected by taken case study. For analysis, recorded at nearby structural documentation used. ETABS software for analysis. Modal pushover analyses performed, obtaining capacity curves main axes building. Two advanced methods obtain fragility mean state curves. performance points through linear equivalent approximation. This allows estimation analysis probability complete functions Results show actual is close 60%. fact mainly due greater severity action results accordance produced earthquake confirm risk assessments.