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°±âµÕ-¾àº¸ °³³äÀ» À§ÇÑ ±âµÕ-º¸ ÈÚ°µµºñ / Column-to-Beam Strength Ratio for Strong Column-Weak Beam Concept / Á¦ ¥±-2 ºÐ°ú : °Ç¹°ÀÇ µ¿Àû°Åµ¿ Ư¼º |
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Çѱ¹ÁöÁø°øÇÐȸ Ãá°èÇмú¹ßǥȸ ³í¹®Áý (2007-03) |
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½ÃÀÛÆäÀÌÁö(248) ÃÑÆäÀÌÁö(8) |
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The concept of strong column - weak beam is frequently used to assure the safety of building structures subjected to earthquake. In the present study, parametric study using nonlinear numerical analysis was performed to investigate the column-to-beam strength ratio required to prevent the soft-story mechanism of reinforced concrete moment resisting frames. Based on the results, the design value of column-to-beam strength ratio was developed. The proposed column-to-beam strength ratio was defined as the function of the allowable maximum rotational capacity at the plastic hinges of beams. The proposed method was applied to the earthquake design of regular and irregular buildings. The performance of the structures designed by the proposed method was evaluated by numerical nonlinear static and dynamic analyses. The results showed that the structures exhibited sound plastic mechanisms at ultimate state, without excessive column yielding and development of the soft-story. |