TEST AND ANALYSIS ON THE PROGRESSIVE COLLAPSE OF STEEL TRUSSES UNDER CYCLIC LOADING

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  • 今瀬 史晃
    名城大学大学院理工学研究科建設システム工学専攻
  • 宇佐美 勉
    名城大学 理工学部建設システム工学科
  • 舟山 淳起
    名城大学大学院理工学研究科建設システム工学専攻
  • 王 春林
    名城大学大学院理工学研究科建設システム工学専攻

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Other Title
  • 繰り返し荷重を受ける鋼トラスの進行性破壊に関する実験と解析

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 The objective of this study is to examine experimentally and analytically the damage progress of steel truss structures in cyclic loadings. The adequacy of a numerical model developed in the past study for analyzing truss structures under cyclic or dynamic loadings is examined in view of the test results of model truss structures. Seven steel truss specimens whose panel points are rigidly connected through gusset plates by high-tension bolts were tested under constant vertical loads and cyclically increasing horizontal loads. Two truss models equipped with buckling restrained braces as diagonal members were tested. Moreover, elastic-plastic large displacement analysis is executed with appropriate modeling of test truss structures and with initial lateral loads simulating initial imperfections. In many cases, good correlation between test and analysis is observed up to the points where local bolt hole damages appear near the lower panel points of test truss structures. In addition an analytical model that can examine the up-lift effect of a base plate on the hinge-support has been proposed to improve the analytical modeling.

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