

3.4 



•5 

 S, 

 a 



—, 



3.2 

 3.0 



c 



2.8 



s 



2.6 



c 



g 



2.4 



s 



2.2 





2.0 



J3 

 & 

 c 



1.8 





1.6 



2 1-4 



u 1.2 



















































































overconsolidated clays (OCR 



= 2) or 































normally consolidated, moderate 

 sensitivity (2 - 5) clays 



normally consolidated, non-sensitive 



clays 



— - — all clays with liquidity index 1 

 (Note: When s u is estimated, use normally 























































































































1 

























""*-^ 





-~. 













- 



























— — 



«_ 



















"^ 







































'"— — 



— 





~ 



.... 













« 













































-"■ 





- 



~ l - 



■ ■ «. 





•»., 

























'■"■" 

































- 



" 





^""■"V 



lj 



fc 



0.01 



0.1 



1.0 10.0 



Load Duration (sees) 



100.0 



1000.0 



Figure 6-1. Rate factors for cohesive soils (from Douglas, 1978). 



3.4 

 3.2 

 3.0 

 2.8 

 2.6 

 2.4 

 2.2 

 2.0 

 1.8 

 1.6 

 1.4 

 1.2 



1.0 

 0.001 



































1 































































! 



" 















































' 





B = 



2.1 m( 



7 ft 









































' 

















































































































































. 



' 













































































































































B = 





n 



tNv 



























































































0.01 



0.1 1.0 



Load Duration (sees) 



10.0 



100.0 



Figure 6-2. Inertial factors for sand and clay (from Douglas, 1978). 



49 



