アンカーボルト降伏型立型構造物の耐震設計法に関する研究 : 大型振動台による加振実験

概要

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This report deals with a fundamental study concerning the elastoplastic design of tall-structure systems, paying attention to anchor-bolt yielding during earthquakes. To investigate the dynamic behavior of the structure systems, a shaking-table test was conducted. A tall-structure model with a 1000kg concentrated mass at the top and an anchor bolt with a constricted part at the center was provided for the test. The sinusoidal sweep wave and two types of random vibrations were used as the input excitations for the shaking table. The following conclusions Were obtained from the tests. (1) When the tower model resonated and the anchor bolt deformed plastically, the natural frequency of the model fell rapidly and behaved like a rocking vibration. (2) The relationship between the dynamic tension load and the strain of the anchor bolt always remained almost constant regardless of the characteristics of the input wave. (3) The hysteresis of the structure model agreed well with the simulated hysteresis using a single-degree-of-freedom structure model. (4) The amount of energy dissipated up to the break of all anchor bolts was calculated.
一般社団法人日本機械学会の論文
1991-08-25