Browsing by Author "Astroza, Rodrigo"
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Item Adaptive Kalman filters for nonlinear finite element model updatingSong, Mingming; Astroza, Rodrigo; Ebrahimian, Hamed; Moaveni, Babak; Papadimitriou, CostasItem Analysis of fuel storage tanks under internal deflagrations with different venting technologies: an experimental and numerical studyHernandez, Francisco; Carcamo, Luis; Hao, Hong; Zhang, Xihong; Contreras, Nicolas; Astroza, RodrigoItem Auto-regressive model based input and parameter estimation for nonlinear finite element modelsCastiglione, Juan; Astroza, Rodrigo; Eftekhar Azam, Saeed; Linzell, DanielItem Autonomous Sensor System for Low-Capacity Wind Turbine Blade Vibration MeasurementMuxica, Diego; Rivera, Sebastian; Orchard, Marcos E.; Ahumada, Constanza; Jaramillo, Francisco; Bravo, Felipe; Gutiérrez, José M.; Astroza, RodrigoItem Autoregressive model based input and parameter estimation for nonlinear finite element models(Universidad de los Andes) Astroza, RodrigoA novel framework to accurately estimate nonlinear structural model parameters and unknown external inputs (i.e., loads) using sparse sensor networks is proposed and validated. The framework assumes a time-varying auto-regressive (TAR) model for unknown loads and develops a strategy to simultaneously estimate those loads and parameters of the nonlinear model using an unscented Kalman filter (UKF). First, it is confirmed that a Kalman filter (KF) allows to estimate TAR parameters for a measured, earthquake, acceleration time-history. The KF-based framework is then coupled to an UKF to jointly identify unmeasured inputs and nonlinear finite element (FE) model parameters. The proposed approach systematically assimilates different structural response quantities to estimate TARandFEmodelparameters and, asa result, updates the FE model and unknown external excitation estimates. The framework is validated using simulated experiments on a realistic three-dimensional nonlinear steel frame subjected to unknown seismic ground motion. It is demonstrated that assuming relatively low order TAR model for the unknown input leads to precise reconstruction and unbiased estimation of nonlinear model parameters that are most sensitive to measured system response.Item A Bayesian approach for fatigue damage diagnosis and prognosis of wind turbine bladesJaramillo, Francisco; Gutiérrez, José Martín; Orchard, Marcos; Guarini, Marcelo; Astroza, RodrigoItem Bayesian inference for calibration and validation of uniaxial reinforcing steel modelsBirrell, Matias; Astroza, Rodrigo; Restrepo, José I.; Loftizadeh, Koorosh; Carreño, Rodrigo; Bazáez, Ramiro; Hernández, FranciscoItem Bayesian Model-Updating Implementation in a Five-Story BuildingHurtado, Oscar D.; Ortiz, Albert R.; Gomez, Daniel; Astroza, RodrigoItem Bayesian Nonlinear Finite Element Model Updating of a Full-Scale Bridge-Column Using Sequential Monte Carlo(Springer) Ramancha, Mukesh K.; Astroza, Rodrigo; Conte, Joel P.; Restrepo, Jose I.; Todd, Michael D.Item Bayesian parameter and joint probability distribution estimation for a hysteretic constitutive model of reinforcing steelBirrell, Matias; Astroza, Rodrigo; Carreno, Rodrigo; Restrepo, Jose; Araya-Letelier, GerardoItem Bayesian updating and identifiability assessment of nonlinear finite element modelsRamancha, Mukesh K.; Astroza, Rodrigo; Madarshahian, Ramin; Conte, Joel P.Item Biopolymer-waste fiber reinforcement for earthen materials: Capillary, mechanical, impact, and abrasion performanceGonzalez-Calderon, Héctor; Araya-Letelier, Gerardo; Kunze, Sabine; Burbano-Garcia, Claudia; Reidel, Úrsula; Sandoval, Cristián; Astroza, Rodrigo; Bas, FernandoItem Calibration of a large nonlinear finite element model of a highway bridge with many uncertain parameters(Springer New York LLC) Astroza, Rodrigo; Barrientos, Nicolás; Li, Yong; Saavedra Flores, ErickItem Correction to: Evolution of modal parameters of composite wind turbine blades under short- and long-term forced vibration tests (Journal of Civil Structural Health Monitoring, (2024), 14, 4, (1059-1074), 10.1007/s13349-024-00773-1): Evolution of modal parameters of composite wind turbine blades under short- and long-term forced vibration tests (Journal of Civil Structural Health Monitoring, (2024), 14, 4, (1059-1074), 10.1007/s13349-024-00773-1)Gutiérrez, José M.; Astroza, Rodrigo; Jaramillo, Francisco; Orchard, Marcos; Guarini, MarceloItem Cyclic Behavior of U-Shaped Flexural Plates for Their Implementation in Multidirectional Energy Dissipation DevicesGonzález, Jorge; Barriuso, Fernando; Bazáez, Ramiro; Pérez, Luis; Lara-Rodríguez, Gabriel; Astroza, Rodrigo; Heresi, PabloItem Data-driven analysis of crustal and subduction seismic environments using interpretation of deep learning-based generalized ground motion modelsFayaz, Jawad; Astroza, Rodrigo; Angione, Claudio; Medalla, MiguelItem Effect of Bidirectional Hysteretic Dampers on the Seismic Performance of Skewed Multi-Span Highway BridgesAldea, Sofía; Bazáez, Ramiro; Heresi, Pablo; Astroza, RodrigoItem Effects of soil spatial variability on the seismic response of multi-span simply-supported highway bridgesGuajardo, Benjamín; Pinto, Francisco; Astroza, RodrigoItem Estimation of Empirical Response Spectrum and local responses of the Justicia Espada Acuña Mena building using the Mod-?(var) method for the 2010 central Chilean mega-earthquake (Mw=8.8)Arellano, Benjamín; Hernández, Francisco; Massone, Leonardo M.; Astroza, Rodrigo; Soto, Pedro; Contreras, Nicolás; Garrido, BastiánItem Evolution of modal parameters of composite wind turbine blades under short- and long-term forced vibration testsGutiérrez, José M.; Astroza, Rodrigo; Jaramillo, Francisco; Orchard, Marcos; Guarini, Marcelo
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