Oblique penetration/perforation of metallic plates by rigid projectiles with slender bodies and sharp noses;

Based on the performance evaluation results by pushover analysis,the elastic stiffness,the design bearing capacity value and the transverse reinforcement characteristic value of beams and columns which influence structural pushover curve are analyzed respectively.

This paper mainly introduces the choice of the structural system, the confirmation of base elastic stiffness,the affection of various base elastic stiffness on the inner force of the latticed shell a.

in this paper, the flexible spring was introduced and the interation of rigid spring and flexible spring was studied to make the contact of blocks more reasonable andpracticalFinally, the stress, strain and breaking of a bric.

The cooperative works of single rank of piles with Mdifferent vertical elastic rigidity under strip beam,is analysed herein and proposals are given here for calculating the load of foundation of single rank of piles under there circumstances.