Influence of diagonal brace layout scheme on collapse resistance of high formwork
Based on LS-DYNA,the influence of four kinds of diagonal bracing layout schemes of symmetric matrix type,symmetric plum blossom type,spiral matrix type and spiral plum blossom type on the ultimate bearing capacity of high formwork and the failure law of vertical rods was compared and analyzed.The dynamic response law of high formwork under sudden failure of key vertical rods was studied by using the transformed load path method(AP method).The collapse resistance of high formwork was evaluated by combining displacement ratio method and stress ratio method.The results show that compared with the ultimate bearing capacity,spiral plum blossom type>symmetrical plum blossom type>spiral matrix type>symmetrical matrix type.In the symmetrical layout scheme,the bottom layer of the Ⅰ-type vertical rods is destroyed first,and the specific position of the initial instability vertical rods of the spiral frame is irregular.Comparison of collapse resistance of high formwork,spiral plum blossom type>symmetrical plum blossom type>symmetrical matrix type>spiral matrix type.
building structuredisc-buckle support systeminclined bracing erectionultimate bearing capacitycollapse lawresistance to progressive collapsedynamic response
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维普
