000019816 001__ 19816
000019816 005__ 20170118182337.0
000019816 04107 $$aeng
000019816 046__ $$k2017-01-09
000019816 100__ $$aÁlvarez, Evelyn
000019816 24500 $$aIdentification of the Dynamic Response Parameters of a Concrete Building During Recent Earthquakes Using Structural Monitoring

000019816 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019816 260__ $$b
000019816 506__ $$arestricted
000019816 520__ $$2eng$$aThe main building of the Faculty of Engineering at Pontificia Universidad Católica de Valparaíso, emplaced in Valparaíso city at central coastal region of Chile, has been instrumented with a vibration sensor network that consists of three synchronized triaxial strong motion accelerometers. This reinforced concrete building structured with shear walls and frames consist in one underground level and five levels over-ground. Since 2015, September to 2016, April, it was subjected to 122 sensible earthquakes with magnitude (MI or Mw) between 4.5 and 8.4. The acceleration records were collected for each earthquake in two orthogonal-horizontal directions and the vertical direction in three different floors of the building: base (-1 level), second floor and fourth floor. Previously, during 2014 the initial conditions of the measure were obtained, before the study of earthquakes occurred, using velocity and acceleration records of micro-tremors: the soil’s resonant period and structure’s vibration periods were obtained using frequency domain analysis. Techniques of dynamic system identification based on both the time domain (space-state equations) and the frequency domain (Fourier analysis, EFDD) have been applied and compared. The correlation of the response parameters with some intensity seismic parameters recommended by the literature also was studied. This enabled the assessment of variation of the parameters of dynamic response, such as the vibration periods in relationship to the variation of the seismic intensity parameters. Also, know the history of the dynamic response parameters under analysis before and after each earthquake enabled the study of damage states in this specific structure. The main results indicate that all the identification used techniques obtain similar estimation for modal vibration periods: these modal vibration periods are not constant during the time and they can be influenced by the seismic intensity although the soil motions have low intensities. Also was observed that the variation of modal vibration periods between before and after of the used earthquakes (soft earthquakes) is on order of the intrinsic variation of the identification methods.

000019816 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019816 653__ $$aStructural health monitoring; dynamic response parameters; identification of dynamic systems

000019816 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019816 720__ $$aÁlvarez, Evelyn$$iOrrego, Tomás$$iAlcaí­no, Pablo
000019816 8560_ $$ffischerc@itam.cas.cz
000019816 8564_ $$s854699$$uhttps://invenio.itam.cas.cz/record/19816/files/4476.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4476.
000019816 962__ $$r16048
000019816 980__ $$aPAPER