000022253 001__ 22253
000022253 005__ 20170622150004.0
000022253 04107 $$aeng
000022253 046__ $$k2015-05-25
000022253 100__ $$aRicles, James
000022253 24500 $$aDEVELOPMENTS IN COMPUTATIONAL DYNAMICS TO ENABLE LARGE-SCALE REAL-TIME HYBRID SIMULATION FOR ADVANCING PERFORMANCE-BASED EARTHQUAKE ENGINEERING

000022253 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022253 260__ $$bNational Technical University of Athens, 2015
000022253 506__ $$arestricted
000022253 520__ $$2eng$$aHybrid simulation is a method where a structural system is discretized into two domains, namely, an analytical substructure and an experimental substructure. The two domains are linked through their common degrees of freedom of the system, where the former substructure is modeled numerically (typically using the finite element method) and the later substructure modeled physically by constructing a test specimen in the laboratory. The necessity to physically model a part of the structural system stems from the lack of a computational dynamic model that can accurately model that portion of the system. By including both substructures the complete structural system is accounted for in the simulation. Hybrid simulation is performed in real-time (and referred to herein as real-time hybrid simulation (RTHS)) to account for load-rate dependency of the system and thereby obtain accurate and reliable results under dynamic loading. RTHS is a new technique that had gained considerable interest by researchers for experimentally evaluating the performance of structural systems under dynamic loading, particularly that involving earthquake loading conditions. The advancement of RTHS will enable the experimental evaluation of new forms of structural systems to be assessed, including innovative structural designs that increase the resiliency of modern society. To achieve accurate results in a real-time hybrid simulation the integration scheme used to integrate the equations of motion must be robust, stable, and of higher order since the time step is limited by the speed of the servo-hydraulic control system used in the simulations (which typically limit the time step to be no smaller than 1/1024 sec.). This lecture will present recent developments in explicit integration algorithms that enable RTHS of nonlinear complex structural systems subject to earthquake loading to be achieved. The development and implementation of explicit unconditionally stable algorithms possessing controlled numerical damping are discussed. The interaction of the algorithms and effects of experimental error and noise in restoring forces, nonlinear states in the substructures, and servo-hydraulic actuator delay compensation is presented and means to minimize these effects to arrive at an accurate simulation are discussed. Examples of RTHS of steel and reinforced concrete structures subject to strong ground motions from earthquakes are provided to illustrate the success of the algorithms in advancing RTHS.

000022253 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022253 653__ $$a

000022253 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022253 720__ $$aRicles, James
000022253 8560_ $$ffischerc@itam.cas.cz
000022253 8564_ $$s9963$$uhttp://invenio.itam.cas.cz/record/22253/files/C1677_abstract.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022253 962__ $$r22030
000022253 980__ $$aPAPER