Evaluation Of Liquefaction Potential On Selected Sites Of Hawassa City

A city of high population growth and rapid development founded on top of soft, lacustrine andrnalluvial deposit, Hawassa is located in a seismically active area of the country. On top of this, thernfact that it is a lakeside city makes liquefaction a potential hazard that calls for seriousrnconsideration. This thesis evaluates the potential of liquefaction of Hawassa city based on datarnacquired after selecting sites in and around the city. Based on these data, the level of hazard withrnrespect to magnitudes of earthquakes and vulnerable layers thickness with depth is assessed. SPTrnand shear-wave velocity based simplified procedure methods are used to evaluate thernliquefaction potential of the study area. This study evaluates liquefaction resistance of the soilrnagainst earthquake induced loads expressed in terms cyclic shear stress of the study area. Thernresults of the analyses are compared with factor of safeties recommended by ES-EN1998:2015rnand BSSC 2000. Majority of the results indicated liquefaction hazard is minimal within the cityrnwith some parts showing marginal signs of liquefaction, leading to the recommendation of siternspecific studies for important structures.

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