A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A Hybrid Experiment for Examination of Structural Control Considering Soil-Structure Interaction
Applying advanced hazard mitigation strategies such as structural control can provide protection against seismic excitations and allow engineers to build safer and more economical structures. Structural control increases the safety and performance of a traditional design by redistributing and dissipating the energy of the structure. Experimental verification of structural control can capitalize on the capabilities of NEES to conduct more extensive tests including, for example, the effects soil-structure interaction on the performance of structural control. Soil-structure interaction is the relationship between a structure and its supporting soil. The dynamics of the soil when combined with the dynamics of the structure can lead to significantly increased structural response depending on the frequency matching of soil and structure. One concern is the potential effect of this change in the system on the stability and performance of an applied control strategy. Full-scale or large scale investigation and validation of this complex, combined behavior is difficult to realize due to the expense and risks involved in the testing of such systems. Therefore, multi-site component testing, using interacting computational modules will aid civil engineering researchers in developing an understanding of such behaviors. Herein we demonstrate a step forward toward the realization of this goal. The focus is on an international experimental implementation consisting of a multi-site test performed using the NEES cyberinfrastructure and University Consortium on Instructional Shake Tables (UCIST) bench-scale shake tables controlled through the NEES network (NEESgrid). UCIST has been in existence since 1998 and was developed to facilitate educational efforts to demonstrate structural dynamics and earthquake engineering by introducing these topics at the undergraduate level. Originally consisting of over 23 universities, UCIST now encompasses over 80 shake tables around the world. Only recently was control of the UCIST shake tables through the NEESgrid accomplished at the Smart Structures Laboratory at the Colorado School of Mines. In the multi-site international experiment described in this paper, the effect of soil-structure interaction on the performance of a passive structural control strategy is examined. A substructure approach to soil-structure interaction is employed where the soil and the structure are tested in series. The shaking of the bedrock and alluvium is accomplished on one UCIST shake table at the Colorado School of Mines in Golden, Colorado. The controlled structure is tested on a second UCIST shake table at Nihon University in Tokyo, Japan. The multi-site experiment was successfully coordinated and controlled using the NEES cyberinfrastructure.
A Hybrid Experiment for Examination of Structural Control Considering Soil-Structure Interaction
Applying advanced hazard mitigation strategies such as structural control can provide protection against seismic excitations and allow engineers to build safer and more economical structures. Structural control increases the safety and performance of a traditional design by redistributing and dissipating the energy of the structure. Experimental verification of structural control can capitalize on the capabilities of NEES to conduct more extensive tests including, for example, the effects soil-structure interaction on the performance of structural control. Soil-structure interaction is the relationship between a structure and its supporting soil. The dynamics of the soil when combined with the dynamics of the structure can lead to significantly increased structural response depending on the frequency matching of soil and structure. One concern is the potential effect of this change in the system on the stability and performance of an applied control strategy. Full-scale or large scale investigation and validation of this complex, combined behavior is difficult to realize due to the expense and risks involved in the testing of such systems. Therefore, multi-site component testing, using interacting computational modules will aid civil engineering researchers in developing an understanding of such behaviors. Herein we demonstrate a step forward toward the realization of this goal. The focus is on an international experimental implementation consisting of a multi-site test performed using the NEES cyberinfrastructure and University Consortium on Instructional Shake Tables (UCIST) bench-scale shake tables controlled through the NEES network (NEESgrid). UCIST has been in existence since 1998 and was developed to facilitate educational efforts to demonstrate structural dynamics and earthquake engineering by introducing these topics at the undergraduate level. Originally consisting of over 23 universities, UCIST now encompasses over 80 shake tables around the world. Only recently was control of the UCIST shake tables through the NEESgrid accomplished at the Smart Structures Laboratory at the Colorado School of Mines. In the multi-site international experiment described in this paper, the effect of soil-structure interaction on the performance of a passive structural control strategy is examined. A substructure approach to soil-structure interaction is employed where the soil and the structure are tested in series. The shaking of the bedrock and alluvium is accomplished on one UCIST shake table at the Colorado School of Mines in Golden, Colorado. The controlled structure is tested on a second UCIST shake table at Nihon University in Tokyo, Japan. The multi-site experiment was successfully coordinated and controlled using the NEES cyberinfrastructure.
A Hybrid Experiment for Examination of Structural Control Considering Soil-Structure Interaction
Loebach, Leah (author) / Ward, Christopher (author) / Christenson, Richard (author) / Seto, Kazuto (author) / Dyke, Shirley (author)
17th Analysis and Computation Specialty Conferenc at Structures 2006 ; 2006 ; St. Louis, Missouri, United States
Structures Congress 2006 ; 1-10
2006-10-10
Conference paper
Electronic Resource
English
A Hybrid Experiment for Examination of Structural Control Considering Soil-Structure Interaction
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