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A platform for research: civil engineering, architecture and urbanism
Geosynthetics for earthquake hazard mitigation
Shaking table tests were carried out to demonstrate the effectiveness of using a smooth geosynthetic liner as foundation isolator that will reduce earthquake energy prior to being transmitted to a building structure. Various geosynthetic interfaces were investigated to identify a liner that is best suited for foundation isolation. Based on the experimental test results, Ultrahigh Molecular Weight Polyethylene (UHMWPE)/nonwoven geotextile interface was selected to be ideally suited for foundation isolation. A model building structure was fabricated and tested on the shaking table to investigate the benefits of using UHMWPE/geotextile liner as foundation isolator. The column shears forces, the acceleration of the roof mass, and the slip along the liner interface were measured and analysed under three earthquake excitations. The results show that through slip deformations the UHMWPE/geotextile liner reduces seismic energy, thus dramatically reducing the dynamic response of the building model. At a base acceleration of 0.40 g, the column shear force in the building model on the UHMWPE/geotextile liner was 35 % of that corresponding to a conventionally built, fixed base structure. Associated with this reduction in the column shear force was a permanent slip deformation measured to be about 4 cm. In addition, using geosynthetics for foundation isolation to reduce seismic energy transmitted to buildings can be very cost effective. It is also a simpler alternative to earthquake hazard mitigation measures conventionally used in current engineering practice.
Geosynthetics for earthquake hazard mitigation
Shaking table tests were carried out to demonstrate the effectiveness of using a smooth geosynthetic liner as foundation isolator that will reduce earthquake energy prior to being transmitted to a building structure. Various geosynthetic interfaces were investigated to identify a liner that is best suited for foundation isolation. Based on the experimental test results, Ultrahigh Molecular Weight Polyethylene (UHMWPE)/nonwoven geotextile interface was selected to be ideally suited for foundation isolation. A model building structure was fabricated and tested on the shaking table to investigate the benefits of using UHMWPE/geotextile liner as foundation isolator. The column shears forces, the acceleration of the roof mass, and the slip along the liner interface were measured and analysed under three earthquake excitations. The results show that through slip deformations the UHMWPE/geotextile liner reduces seismic energy, thus dramatically reducing the dynamic response of the building model. At a base acceleration of 0.40 g, the column shear force in the building model on the UHMWPE/geotextile liner was 35 % of that corresponding to a conventionally built, fixed base structure. Associated with this reduction in the column shear force was a permanent slip deformation measured to be about 4 cm. In addition, using geosynthetics for foundation isolation to reduce seismic energy transmitted to buildings can be very cost effective. It is also a simpler alternative to earthquake hazard mitigation measures conventionally used in current engineering practice.
Geosynthetics for earthquake hazard mitigation
Geokunststoffe für die Minderung von Erdbebengefahren
Yegian, M.K. (author) / Kadakal, U. (author) / Catan, M. (author)
1999
14 Seiten, 13 Bilder, 4 Quellen
Conference paper
English
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