차체구조물의 붕괴거동에 관한 연구

In this study, collapse behavior of frame composed of thin-walled rectanguIar tube is investigated. Considering the collapse of frame, the bending and compression members undergo argedeformation. The stiffness of the compound element is obtained from analytical moment-rotation relationship and approximated load-deflection relationship of thin-walled rectangular tube. A computer program is developed for the large deformation analysis of frame. A ncremental displacement method is used in the program and at each incremental stage, the stiffness matrix of the total structure is checked with the state of each element for bendign and compression.