Empirical formula for fundamental vibration periods of reinforced concrete buildings in Taiwan

摘要: More than 30 buildings around Taiwan have been selected to monitor the floor responses under seismic excitation. The structural array monitoring system in each building controls at most 27 channels of accelerometers distributed several floors. Those were triggered by many events during past five years operation. In building, records basement Can be considered as ground excitation, and others upper floors are responses. frequency transfer functions those can identified ARX models, then fundamental vibration periods estimated. using different compared order ensure reliability identification. An empirical formula predicting period is presented through regression analysis 21 reinforced concrete (RC) moment-resisting frame (MRF) buildings. It found that height a plays an important role period, with length, width, time after completion building. also RC MRF tend stiffer U.S.