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u� <br /> Based on avallat a <br /> O <br /> rn Rock ,yip h- --- Estimation <br /> Z 0.5 j � cc <br /> W 0.8 <br /> i J <br /> r <br /> LLi <br /> W0.4 i� e`a Q `� ``�q�\��8 <br /> W Stiff SOUS Q <br /> i° <br /> U e Z 0.4 <br /> i i° <br /> Q 0.3 - O <br /> cc <br /> Q 0.2 i'� Q 0.2 SO <br /> Deep cohesionless soils w <br /> �\ <br /> V ,. 1 <br /> at <br /> ° 0.1 - ° <br /> c0 <br /> 0 <br /> 2 5 10 20 50 100 <br /> CLOSEST HORIZONTAL DISTANCE FROM ZONE <br /> OF ENERGY RELEASE (mi) <br /> 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 <br /> BFigure 10.22 Average values of maximum accelerations in rock. (From Seed and Idriss, <br /> rock - MAXIMUM ACCELERATION ON ROCK, g 1982. Reproduced by permission of Earthquakes Engineering Research Institute.) <br /> Figure 10.20 Approximate values for ground acceleration. (From Seed and Idriss, 1982. <br /> Reproduced by permission of Earthquake Engineering Research Institute.) 1000- <br /> T r- <br /> o.s \� M ® 8 1/4 <br /> 1007 N M - 71/2 <br /> rn 0.5 <br /> z g <br /> pa 0.4 _---"" 10 <br /> CCz <br /> W 1989 tome Prlete „�''� --- I W <br /> L U 0.3 W <br /> Q U _ <br /> p W � Median relationship recommended J 1 M 6 1/2 <br /> g Q 02 tl <br /> for use in empirical correlations <br /> �W �.. <br /> wcc O <br /> ttf <br /> rn 0.1 0.1 <br /> / 1985 Mexico City { <br /> 0 <br /> 0 0.1 0.2 0.3 0.40.5 0.8 I 0.0 1 <br /> ACCELERATION ON ROCK SITES, g 0 0.2 0.4 o.s 0.8 1.0 <br /> ky/kmax <br /> Figure 10.21 Variations of acceleratons on soft soil sites versus rock sites. (From ldriss, Figure 10.23 Variation of permanent displacement with yield acceleration. (From Makdisi <br /> 1990 ) and Seed, 1977.) <br /> i <br /> ? <br /> 641 <br />