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Resume
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Objectives
of Benchmark Problem on Structural Control
Structural
control systems, such as passive dampers, tuned mass dampers, active/hybrid and
semi-active control systems, have been widely accepted as effective means for
protection of civil engineering structures against earthquakes and wind
loads. While many structural control devices and control algorithms have been
proposed for such applications, a systematic study to investigate advantages
and disadvantages of these devices and algorithms is yet to be conducted. The
objectives of benchmark studies are to make direct comparisons between
performance of devices and algorithms using a particular benchmark structure,
a set of external excitations and a set of performance criteria. Such studies
are important for successful development of structural control devices and
algorithms, and resolve issues that are critical in practical applications of
structural control systems.
In this regard, the
following two generations of benchmark problems have been proposed and
investigated.
1.
The
first generation of benchmark problem consisted of two benchmark structures, both
scale models of a three-story building, employing an active mass driver (AMD) controller (in the Structural
Dynamics and Control / Earthquake Engineering Laboratory (SDC/EEL) at the University of Notre
Dame); and an active tendon controller (at the National Center for Earthquake
Engineering Research (NCEER) in Buffalo, New York). These benchmark problems
were proposed to investigate the effectiveness of structural control devices
and algorithms for protection against earthquakes. Detailed information about
these benchmark problems can be found at http://www.nd.edu/~quake/.
2.
The
second generation of benchmark problem consists of Earthquake-Excited
20-Story Building (http://www.nd.edu/~quake/) and a 76-story concrete tower, proposed for
construction in Melbourne, Australia. A tuned mass damper (TMD) is
installed on the top floor of the building. A sample problem using LQG
control theory is presented to demonstrated the effectiveness of the
performance of the active tuned mass damper (ATMD) in reducing wind-induced
dynamic excitations. However, the designer has the flexibility to
choose a different type of device (e.g., active mass driver (AMD), passive dampers, semi-active
control devices, etc.). A paper about the detailed development of the
benchmark 76-story wind-excited building is available for download from this
site.
3.
In the
third generation of benchmark problem for response control of
wind-excited tall buildings, wind tunnel testing has been conducted on a
scaled model of the benchmark problem building to experimentally measure
along and across wind loading time histories. Based on the
experimentally measured loading time-histories, the second generation benchmark
problem has been reformulated to include performance criteria using peak and
temporal rms values of response, control force and control power. A
detailed information about the package, including Matlab based computer
programs, wind load time histories and the benchmark paper is available for
download from this site. Please click on the benchmark problem button
to further information.
Please feel free to contact
us if you are interested in
participating in the benchmark study or if you encounter any problem in
downloading the data.
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