Implementation and verification of real-time hybrid simulation (RTHS) using a shake table for research and education

Ashasi-Sorkhabi, Ali; Malekghasemi, Hadi; Mercan, Oya

doi:10.1177/1077546313498616

Cited by 39 publications

(23 citation statements)

References 21 publications

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“…In this study, the modified approach of adding a velocity feedforward gain in is adopted. The block diagram of the modified controller with velocity feedforward gain K v is given in Figure .…”

Section: Test Setupmentioning

confidence: 99%

“…In order to evaluate the effectiveness of TLDs on seismic response reduction of structures, the substructure shake table testing (SSTT) method, which belongs to the up-to-date real-time hybrid simulation (RTHS) techniques, 6 attracts considerable attention in recent years. [7][8][9][10] When conducting a substructure shake table test for a TLD-structure system, the TLD and the main structure are regarded as the experimental and the analytical substructure, respectively. The experimental substructure is loaded through a shake table, whereas the analytical substructure is numerically simulated in a computer.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of seismic response reduction effects of particle damper using substructure shake table testing method

Jiang

2018

Struct Control Health Monit

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Summary In order to evaluate the effectiveness of particle dampers (PDs) on seismic response reduction of structures, a series of substructure shake table tests have been conducted. A new family of explicit model‐based integration algorithms is used to develop the substructure shake table testing (SSTT) method. To implement the SSTT method, a testing system on the basis of the Quanser shake table II is constructed. The effectiveness and accuracy of the proposed SSTT method and the testing system are verified by comparing the results of complete structure shake table tests and the corresponding substructure shake table tests. Mass ratio, which is defined as the ratio of the damper mass to the structural mass and structural damping ratio are taken as two main parameters in the parametric analyses. Twelve cases of PDs, which are categorized into three patterns, with different materials, sizes, and amounts of particles are selected as the experimental substructures. The substructure shake table test results indicate that the overall seismic response reduction effects of three different types of PDs are very close with same mass ratio. Two seismic response reduction ratios in terms of reducing peak and root‐mean‐square relative structural displacements are defined to quantify the seismic response reduction effects of the dampers. It can be concluded from the experimental studies that both seismic response reduction ratios increase as the mass ratio increases and decreases as the structural damping ratio increases.

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Section: Test Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental study of seismic response reduction effects of particle damper using substructure shake table testing method

Jiang

2018

Struct Control Health Monit

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“…[ 19 ] In this approach, a building that generally behaves linearly under wind loadings is modeled on a computer, and a TSD system is physically modeled using a scale model. More recently, Lee et al [ 20 ] Ashashi‐Sorkhabi et al [ 21,22 ] and Malekghasemi et al [ 23 ] have performed similar HIL simulations to demonstrate its feasibility as a proof‐of‐concept in terms of example models and a pure TSD (without screen) under sinusoidal and earthquake loads. Wang et al [ 24 ] has compared the HIL to pure shake table test results obtained through the two‐story shear frame model and showed its effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Hybrid simulation of a tall building with a double‐decker tuned sloshing damper system under wind loads

Kwon

Kareem

2020

Structural Design Tall Build

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Summary This study presents an advanced experimental system, hardware‐in‐the‐loop (HIL), recently referred to as hybrid testing, to validate the effectiveness of a double‐decker tuned sloshing damper (TSD) system with screens applied to a recently constructed tall building. The HIL simulation facilitates a performance analysis of a combined structure‐damper system in which the nonlinear behavior of liquid motion in a TSD is physically modeled, whereas a building system under wind loads that behaves linearly is embedded virtually utilizing a computer model. The scaled model of the TSD is composed of a computer‐controlled system with a shaking table, sensors, and a real‐time communication link. The virtual building system on the computer communicates in real time with the hardware, that is, the physical model of TSD to evaluate on‐the‐fly the performance of a combined building‐TSD system. External excitation including random loading characteristics of winds, waves, or earthquakes can be implemented in HIL to observe the dynamics of the building‐damper system under a host of loading scenarios. An example of a recently completed tall reinforced concrete building with multiple TSDs placed side by side in double‐decker configuration under a suite of external loads and the proposed damping estimation procedure to evaluate the amount of auxiliary damping with TSD for ensuring the TSD design is presented. It examines the habitability of the building in winds and evaluates the effectiveness of the TSD system as well as the efficacy of the first HIL simulation for an actual tall building‐TSD system equipped with screens inside.

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“…[10]. In RTHS, as only the critical components of the test structure need to be built and tested physically and remaining parts are modelled analytically, a wide range of influential parameters and loading cases could be considered in a timely and cost-effective manner [11].…”

Section: Introductionmentioning

confidence: 99%

The effects of measurement errors in the restoring force feedback during real-time hybrid simulations

Sorkhabi¹,

Mercan²

2013

WIT Transactions on the Built Environment

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Real-time hybrid simulation (RTHS) is a practical and economical experimental technique that integrates physical testing with computer simulation. In this method by dividing the structure into two parts, known as the experimental and analytical substructures, and synchronizing them, the equations of motion are solved in real-time. Thus, RTHS can capture the load-rate dependencies in an accurate manner. The implementation of RTHS involves challenges in accurate control of experimental substructure, execution of the testing algorithms in realtime as well as the synchronization of signals. One of these challenges is the measurement errors in restoring force feedback resulting from the random electrical noise that is usually inevitable in these testing platforms. Since the measured restoring force is used in command generation, RTHS suffers from error propagation affecting the accuracy and in some cases the stability of the simulation results. In this paper, using a recently developed user-reconfigurable computational/control platform at the University of Toronto, the effects of force feedback errors on the RTHS results will be investigated considering a wide range of experimental to analytical stiffness ratios. The accuracy of the RTHS results will be assessed using tracking indicators that reveal the phase and amplitude errors between the RTHS results and exact numerical solutions.

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Implementation and verification of real-time hybrid simulation (RTHS) using a shake table for research and education

Cited by 39 publications

References 21 publications

Experimental study of seismic response reduction effects of particle damper using substructure shake table testing method

Experimental study of seismic response reduction effects of particle damper using substructure shake table testing method

Hybrid simulation of a tall building with a double‐decker tuned sloshing damper system under wind loads

The effects of measurement errors in the restoring force feedback during real-time hybrid simulations

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