Considérant les preuves sur le terrain de plusieurs, l'interaction cinématique a été reconnue comme un mode de défaillance potentiel de la fondation empilés pendant les séismes. Les données accumulées ont suscité beaucoup d'intérêt à explorer les aspects théoriques et analytiques du phénomène et d'élaborer des règlements sismiques de l'incorporer dans les procédures de conception. Modernes codes sismiques tels que Eurocode 8 (EN 1998-5) ou, entre autres, le nouveau code italien (M.LL.PP., 2008), demande, par exemple, cette pile désigne doit également tenir compte des déformations du sol résultant du passage des ondes sismiques lorsque particulier conditions du sol et la sismicité de la zone de se produire. En dépit de l'effort de recherche important sur une telle question et de nombreuses avancées réalisées, deux thèmes principaux devraient être mieux traitées dans les codes sismiques. Le premier consiste à établir un critère simple pour évaluer le potentiel de développement significatif cinématique flexion par rapport à l'interaction d'inertie. Pour une telle ampleur, l'accélération du temps historique, en plus d'accélérations du sol de pointe, devrait être disponible dans le cadre du processus de conception. La dernière question consiste à établir pré-prédictive équations, élaboré à l'échelle régionale, pour calculer les moments transitoires cinématique dans sols stratifiés
Based on worldwide field evidence, kinematic interaction has been recognized as a potential cause of failure for piled foundation during earthquakes. The accumulated evidence has generated significant interest in exploring theoretical and analytical aspects of the phenomenon and developing seismic regulations with the aim of incorporating it into design procedures. Modern seismic codes such as Eurocode 8 (EN 1998-5) or, among others, the new Italian building code (M.LL.PP., 2008), demand, for example, that pile design should also account for soil deformations arising from the passage of seismic waves when particular subsoil and seismicity conditions of the area occur. In this framework, at the present stage two main topics could be better addressed in seismic codes. The former consists in establishing a simple criterion to assess the potential of developing significant kinematic pile bending compared to its inertial counterpart. To such a scope, acceleration time-histories, in addition to peak ground accelerations, should be available as part of the design process. The latter issue is providing simple predictive equations, elaborated on regional scale, to compute the transient kinematic pile bending moments in layered soils.
Based on worldwide field evidence, kinematic interaction has been recognized as a potential cause of failure for piled foundation during earthquakes. The accumulated evidence has generated significant interest in exploring theoretical and analytical aspects of the phenomenon and developing seismic regulations with the aim of incorporating it into design procedures. Modern seismic codes such as Eurocode 8 (EN 1998-5) or, among others, the new Italian building code (M.LL.PP., 2008), demand, for example, that pile design should also account for soil deformations arising from the passage of seismic waves when particular subsoil and seismicity conditions of the area occur. In this framework, at the present stage two main topics could be better addressed in seismic codes. The former consists in establishing a simple criterion to assess the potential of developing significant kinematic pile bending compared to its inertial counterpart. To such a scope, acceleration time-histories, in addition to peak ground accele-rations, should be available as part of the design process. The latter issue is providing simple predictive equations, elaborated on regional scale, to compute the transient kinematic pile bending moments in layered soils.
Soil-pile kinematic interaction: new perspectives from recent analyses
SIMONELLI A;SICA S;
2011-01-01
Abstract
Based on worldwide field evidence, kinematic interaction has been recognized as a potential cause of failure for piled foundation during earthquakes. The accumulated evidence has generated significant interest in exploring theoretical and analytical aspects of the phenomenon and developing seismic regulations with the aim of incorporating it into design procedures. Modern seismic codes such as Eurocode 8 (EN 1998-5) or, among others, the new Italian building code (M.LL.PP., 2008), demand, for example, that pile design should also account for soil deformations arising from the passage of seismic waves when particular subsoil and seismicity conditions of the area occur. In this framework, at the present stage two main topics could be better addressed in seismic codes. The former consists in establishing a simple criterion to assess the potential of developing significant kinematic pile bending compared to its inertial counterpart. To such a scope, acceleration time-histories, in addition to peak ground accelerations, should be available as part of the design process. The latter issue is providing simple predictive equations, elaborated on regional scale, to compute the transient kinematic pile bending moments in layered soils.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
