| Title: | EVALUATION OF TRIGGERING ACCELERATION REQUIRED FOR COMMENCEMENT OF LIQUEFACTION |
| DOI No: | 10.1142/9789812701602_0030 |
| Source: | GEOTECHNICAL ENGINEERING FOR DISASTER MITIGATION AND REHABILITATION (pp 313-318)
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| Author(s): | SNEHAL R. PATHAK
Department of Civil Engineering, Govt. College of Engineering, Pune, 411005, Maharashtra State, India
DHANANJAY R. PHATAK (Retd.)
Department of Civil Engineering, Govt. College of Engineering, Pune, 411005, Maharashtra State, India
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| Abstract: | Earthquake induced liquefaction is one of the most severe seismic hazards that can damage structures founded on both shallow and deep foundations. Significant amounts of damages have been directly or indirectly attributed to the liquefaction phenomenon in several earthquakes. Assessment of liquefaction potential of sandy soils has attracted considerable attention over the past few decades. Number of techniques have been developed to estimate the likelihood that liquefaction may or may not occur at a given site under specified conditions. Richards et. al. (1999) have proposed a new concept of triggering acceleration for commencement of liquefaction. Authors of this paper have carried out the work to investigate a method for evaluating the triggering acceleration for the initiation of liquefaction in fully saturated sands. Once the initial fluidization occurs, the liquefaction is inevitable which ultimately results into considerable damages. The present work deals with the evaluation of triggering acceleration indicating initiation of liquefaction. Authors have developed a method to compute this acceleration based on model already established by them (1999); which has been used to demarcate “yes” and “no” zones of liquefaction in terms of earthquake magnitude, standard penetration values, initial overburden stress on level ground and epicentral distance. |
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