Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Assessment of liquefaction potential based on peak ground motion parameters
AbstractConventionally, evaluation of liquefaction potential of loose saturated cohesionless deposits as specified in Japanese design codes employs peak ground acceleration (PGA). However, recent large-scale earthquakes in Japan revealed that liquefaction at some sites did not occur even though large PGAs were recorded at or near these sites. As an alternative approach, an evaluation procedure based on peak ground motion parameters, i.e. incorporating both PGA and the peak ground velocity (PGV), is proposed. By performing parametric studies using one-dimensional seismic response analysis and formulating regression models, seismic-induced shear stresses within the deposit are expressed in terms of peak ground motion parameters at the surface, and these are used to calculate the factor of safety against liquefaction. Application to case histories in Japan indicates that the proposed two-parameter equation can adequately account for the occurrence and non-occurrence of liquefaction at various sites as compared to the conventional PGA-based approach. Moreover, analyses of several strong motion records at various sites show that liquefaction may occur when PGA≥150gal and PGV≥20kine, indicating that these values can serve as thresholds in assessing the possible occurrence of liquefaction.
Assessment of liquefaction potential based on peak ground motion parameters
AbstractConventionally, evaluation of liquefaction potential of loose saturated cohesionless deposits as specified in Japanese design codes employs peak ground acceleration (PGA). However, recent large-scale earthquakes in Japan revealed that liquefaction at some sites did not occur even though large PGAs were recorded at or near these sites. As an alternative approach, an evaluation procedure based on peak ground motion parameters, i.e. incorporating both PGA and the peak ground velocity (PGV), is proposed. By performing parametric studies using one-dimensional seismic response analysis and formulating regression models, seismic-induced shear stresses within the deposit are expressed in terms of peak ground motion parameters at the surface, and these are used to calculate the factor of safety against liquefaction. Application to case histories in Japan indicates that the proposed two-parameter equation can adequately account for the occurrence and non-occurrence of liquefaction at various sites as compared to the conventional PGA-based approach. Moreover, analyses of several strong motion records at various sites show that liquefaction may occur when PGA≥150gal and PGV≥20kine, indicating that these values can serve as thresholds in assessing the possible occurrence of liquefaction.
Assessment of liquefaction potential based on peak ground motion parameters
Orense, Rolando P. (Autor:in)
Soil Dynamics and Earthquake Engineering ; 25 ; 225-240
18.10.2004
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Assessment of liquefaction potential based on peak ground motion parameters
| British Library Online Contents | 2005
Assessment of liquefaction potential based on peak ground motion parameters
| Online Contents | 2005
| British Library Conference Proceedings | 2021