한국구조물진단유지관리공학회 학술발표회 논문집, v. 5, no. 2, page. 195-200
Most period code formulas for the RC moment resisting frame building are empirical formulas. Code formula is developed by the measured period of the low-medium buildings during the 1971 San Fernando Earthquake. But measured periods are insufficient to assure the reliability of its accuracy and safety. This paper improves the code formula by regression analysis of the measured period data. Seismic coefficient using the improved formula is evaluated and also compared with those of being based on the current code formula.