Benchmark Problem for Cable-Stayed Bridges
At the Second International Workshop on Structural Control (Dec. 18-20, 1996, Hong Kong), the Working Group on Bridge Control developed plans for a "first generation" benchmark study on bridges. This problem focuses on seismic response control, and was released to the control research community in September 2000. The second phase of this problem is now being developed. Several conference sessions have been organized on this problem (including those at the 7th US National Conf. of Earthquake Engineering and at at the 3rd World Conference on Structural Control).
Web Page: Benchmark Bridge Problem Page
Benchmark Problems in Structural Health Monitoring
The ASCE Task Group on Structural Health Monitoring (formed in 1999) has developed benchmark problems on structural health monitoring. The focus is to provide a means to compare and contrast methodologies on a single problem with realistic, but progressively more challenging, damage scenarios. Both analytical and experimental benchmarks have been proposed. The result for the 1st phase of this problem will be published as a special issue of the Journal of Engineering Mechanics in the near future. Experimental studies were conducted in the summer of 2001 at the University of British Columbia, and analysis of this data is underway.
Web Page: Task Group Page and Problem Definition
Benchmark Problem of Smart Base Isolation
The objective of this benchmark study is to provide a well defined base isolated building with a broad set of carefully chosen parameter sets, performance measures and guidelines to the participants, so that they can evaluate their control algorithms. The control algorithms may be passive, active or semi-active. The benchmark structure considered is an eight story base isolated building similar to existing buildings in Los Angeles, California. The base isolation system includes both linear and nonlinear bearings and control devices. The superstructure is considered to be a linear elastic system with lateral-torsional behavior. A new nonlinear dynamic analysis program has been developed and made available to facilitate direct comparison of results of different control algorithms.
Web Page: Problem Definition for Smart Base Isolation
Benchmark Problem on Health Monitoring of Highway Bridges
Description.
Web Page: Web page
First Generation Benchmark for Structural Control of Buildings
The ASCE Committee on Structural Control initiated the first benchmark study in structural control, considering two benchmark structures, both scale models of a three-story building, employing
Active mass driver (AMD) control system at Notre Dame's Structural Dynamics and Control / Earthquake Engineering Laboratory (SDC/EEL).
Active tendon control system at the Multidisciplinary Center for Earthquake Engineering Research (MCEER) in Buffalo, New York.
These structures were chosen because of the widespread interest in controllers and buildings of these types.
To achieve a high level of realism, evaluation models for these structural system, including the actuator and sensors, were developed directly from experimentally obtained data and form the basis for the benchmark study. In general, controllers that are successfully implemented on the evaluation model can be expected to perform similarly in the laboratory setting (verification of this expectation are in progress in our laboratory). Realistic control constraints and evaluation criteria are included in the benchmark problem definition.
Web Page: Problem Definition for the 1st Generation Benchmark Control Problems.
Papers relating to the these problems from the 1997 ASCE Structures Congress Conference are also available.
Some additional papers and simulation results were presented in a special issue of Earthquake Engineering and Structural Dynamics (Dec. 1997).
Second Generation Benchmark for Structural Control of Buildings
At the Second International Workshop on Structural Control (Dec. 18-20, 1996, Hong Kong), the Working Group on Building Control developed plans for the "second generation" benchmark studies to include not only competing control algorithms, but entire control strategies, including actuator devices, sensors, etc. Two benchmark problems for the control of buildings were developed from this initiative and presented at the Second World Conference on Structural Control (Kyoto, Japan, June 28 - July 1, 1998).
Earthquake-Excited 20-Story Building
This study considers a 20-story steel structure typical of mid- to high-rise buildings designed for the Los Angeles region. The benchmark problem requires a designer to specify actuator type(s) and location(s), controller algorithms, and sensor type(s) and location(s).
Web Page: Problem Definition for the 20-story steel structure representing a typical mid- to high-rise building designed for Los Angeles, California.
Wind-Excited 76-Story Building
A 76-story (36 meter) concrete tower, proposed for Melbourne, Australia, subject to wind excitation is the subject of this benchmark problem. A tuned mass damper (TMD) or an active mass driver (AMD) may be installed on the top floor. The designer must choose controller parameters and algorithms.
Web Page: Wind Benchmark Page where you can download problem definition paper and MATLAB files.
Third Generation Benchmark for Structural Control of Buildings
At the First World Conference on Structural Control held in Pasadena, the necessity of taking into account the structural non-linearity was identified. During the 2nd World Conference on Structural Control, as a result of the success of the linear benchmark's presented, it was decided to pursue the nonlinear analysis for the seismically excited buildings. Also as a result of the success at the 2nd World Conference on Structural Control, a third generation wind-excited benchmark model was developed. Both benchmark models are listed here.
Earthquake-Excited 3-Story, 9-Story and 20-Story Nonlinear Buildings
This study considers three typical steel structures, 3-, 9- and 20-story buildings designed for the SAC project for the Los Angeles, California region. A nonlinear evaluation model has been developed that portrays the salient features of the structural system. The task of each participant in this benchmark study is to define (including sensors and control algorithms), evaluate and report on their proposed control strategies.
Web Page: Problem Definition for the Third Generation Seismic Benchmark Building.
Wind-Excited 76-Story Building
Following the development of the benchmark problem for the response control of a 76-story building in December 1997, wind-tunnel testing has been conducted recently on a 1:400 scale model of the 76-story building to measure wind-load time-history on different floors of the building. The response control performance criterion have been reformulated using experimentally measured wind loads.
Web Page: Problem Definition for the Third Generation Wind Benchmark Building.