Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Compressibility Characteristics of Low-Plasticity Silt before and after Liquefaction
Low-plasticity silt is known to have a potential to liquefy during earthquakes. The compressibility characteristics could change before and after a dynamic event that produces liquefaction. This research investigates the liquefaction resistance and postliquefaction reconsolidation characteristics of Mississippi River Valley (MRV) silt using laboratory cyclic triaxial compression testing. The MRV silt experienced initial liquefaction under cyclic loading, and the results are presented as cyclic stress ratio versus loading cycle curve. After cyclic loading, the liquefied specimens were reconsolidated. Permeability did not change significantly as a result of liquefaction. The reconsolidation curves are more parallel to the compression line than the recompression line in space, suggesting reconsolidation behaved more like preliquefaction compression. The postliquefaction compression and recompression indexes show less compressibility when compared with preliquefaction conditions. These characteristics of MRV silt suggest that reconsolidation after liquefaction should be a consideration during design of civil infrastructure.
Compressibility Characteristics of Low-Plasticity Silt before and after Liquefaction
Low-plasticity silt is known to have a potential to liquefy during earthquakes. The compressibility characteristics could change before and after a dynamic event that produces liquefaction. This research investigates the liquefaction resistance and postliquefaction reconsolidation characteristics of Mississippi River Valley (MRV) silt using laboratory cyclic triaxial compression testing. The MRV silt experienced initial liquefaction under cyclic loading, and the results are presented as cyclic stress ratio versus loading cycle curve. After cyclic loading, the liquefied specimens were reconsolidated. Permeability did not change significantly as a result of liquefaction. The reconsolidation curves are more parallel to the compression line than the recompression line in space, suggesting reconsolidation behaved more like preliquefaction compression. The postliquefaction compression and recompression indexes show less compressibility when compared with preliquefaction conditions. These characteristics of MRV silt suggest that reconsolidation after liquefaction should be a consideration during design of civil infrastructure.
Compressibility Characteristics of Low-Plasticity Silt before and after Liquefaction
Wang, Shuying (Autor:in) / Luna, Ronaldo (Autor:in)
10.10.2013
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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