A computational framework for fast‐time hybrid simulation based on partitioned time integration and state‐space modeling
- 11 July 2019
- journal article
- research article
- Published by Hindawi Limited in Structural Control and Health Monitoring
- Vol. 26 (10), e2419
- https://doi.org/10.1002/stc.2419
Abstract
Hybrid simulation reproduces the experimental response of large- or even full-scale structures subjected to a realistic excitation with reduced costs compared with shake table testing. A real-time control system emulates the interaction between numerical substructures, which replace subparts having well-established computational models, and physical substructures tested in the laboratory. In this context, state-space modeling, which is quite popular in the community of automatic control, offers a computationally cheaper alternative to the finite-element method for implementing nonlinear numerical substructures for fast-time hybrid simulation, that is, with testing timescale close to one. This standpoint motivated the development of a computational framework based on partitioned time integration, which is well suited for hard real-time implementations. Partitioned time integration, which relies on a dual assembly of substructures, enables coupling of state-space equations discretized with heterogeneous time step sizes. In order to avoid actuators stopping at each simulation step, the physical substructure response is integrated with the same rate of control system, whereas a larger time step size is allowed on the numerical substructure compatibly with available computational resources. Fast-time hybrid simulations of a two-pier reinforced concrete bridge tested at the EUCENTRE Experimental Laboratory of Pavia, Italy, are presented as verification example.Keywords
Funding Information
- Dipartimento della Protezione Civile, Presidenza del Consiglio dei Ministri (RELUIS‐DPC 2014‐2018)
This publication has 24 references indexed in Scilit:
- Actuator dynamics compensation based on upper bound delay for real‐time hybrid simulationEarthquake Engineering & Structural Dynamics, 2013
- Monolithic and partitioned time integration methods for real-time heterogeneous simulationsComputational Mechanics, 2012
- Novel generalized-α methods for interfield parallel integration of heterogeneous structural dynamic systemsJournal of Computational and Applied Mathematics, 2010
- REXEL: computer aided record selection for code-based seismic structural analysisBulletin of Earthquake Engineering, 2009
- Effects of Vertical Load, Strain Rate and Cycling on the Response of Lead-Rubber Seismic IsolatorsJournal of Earthquake Engineering, 2009
- The Generalized-α Scheme as a Linear Multistep Integrator: Toward a General Mechatronic SimulatorJournal of Computational and Nonlinear Dynamics, 2008
- Spherical sliding isolation bearings with adaptive behavior: TheoryEarthquake Engineering & Structural Dynamics, 2007
- The analysis of the Generalized -Α method for non-linear dynamic problemsComputational Mechanics, 2002
- Experimental and analytical studies on the performance of hybrid isolation systemsEarthquake Engineering & Structural Dynamics, 2001
- Effect of viscous, viscoplastic and friction damping on the response of seismic isolated structuresEarthquake Engineering & Structural Dynamics, 2000