Influence of joint's position and rigidity on precast box structure's internal force

Taking a subway project as an example, a precast double-scan box structure was divided into five parts by using elastic double-dimension finite-element-method, those five parts included top-board, bottom-board and side-wall. The position and rigidity of the joints of those five parts have a great influence on the structure's internal force. The calculation results show that the joint's rigidity can affect the max positive moment of side-wall, the max negative moment and max positive moment of top-board; the joint's position also have influence on the max positive moment and max negative moment of top-board and side-wall; the joint's position should be located on side-wall where its moment is negative.