16 



VI. CONCLUSIONS 



The following conclusions can be drawn: 



( 1) The maximum stress in the Configuration A model was the 

 membrane stress, and this stress was almost equal to the 

 theoretical membrane stress. 



(2) The maximum stress in the Configuration B model, except 

 at the cable penetrations, was the membrane stress, and 

 this stress was of about the same intensity as that with 

 Configuration A. 



(3) The cable penetrations caused a stress of higher nnagnitude 

 than the membrane stress, with the higher stress concen- 

 tration factor for the larger size of hole. 



(4) The stress concentration factor at the cable penetration was 

 decreased when bolt holes were used, and decreased further for 

 the case of the bolt holes located closer to the cable penetration. 



(5) The magnitude of the stresses at the boundaries of the bolt 

 holes was less than the membrane stress. 



