1方向および2方向鋼構造立体骨組の耐震信頼性評価

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  • SEISMIC RELIABILITY OF 3D 1-WAY AND 2-WAY STEEL MOMENT FRAME STRUCTURES EVALUATED BY PROBABILISTIC APPROACH
  • 1 ホウコウ オヨビ 2 ホウコウ コウ コウゾウ リッタイ ホネグミ ノ タイシン シンライセイ ヒョウカ

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Probabilistic evaluation of the seismic performance of 3D steel moment-frame structures is carried out for two types of framing system: two-way frames typical of construction in Japan and one-way frames typical of construction in the United States. For each framing system, four types of beam-column connections are considered: Pre-Northridge Welded-Flange-Bolted-Web, Post-Northridge Welded-Flange-Welded-Web, Reduced-Beam-Section, and Bolted-Flange-Plate connections. A suite of earthquake ground motions is used to compute the annual probability of exceedence (APE) for a series of drift demand levels and for member plastic-rotation capacity. Results are compared for the different framing systems and connection details. The two-way frames have a smaller APE for small drift demands for which members exhibit no or minimum yielding, but have a larger APE for large drift demands for which members exhibit large plastic rotations. However, the one-way frames, which typically comprise a few seismic frames with large-sized members that have relatively small rotation capacities, may have a larger APE for member failure.

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