Investigating Earthquakes Effect on the Dynamic Parameters of Highrise Structure using Autoregressive Moving Average with Exogenous Input Model

سال انتشار: 1401
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 103

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شناسه ملی سند علمی:

ISAV12_057

تاریخ نمایه سازی: 9 اسفند 1401

چکیده مقاله:

Large-scale civil structures, such as high-rise structures, are exposed to environmental loads and earthquake excitations. On the other hand, considering the great importance of these structures in modern urban societies, it is vital to know the behaviour of the structure during an earthquake. Earthquake excitation often affects structures from two directions, as a result, the system identification problem, in this case, is a complex multi-input multi-output problem. This study investigates a parametric time domain method to reduce the negative impact of these issues. In this regard, an AutoRegressive Moving Average with eXogenous input (ARMAX) was validated on the response signals of a numerical model, which indicates the high accuracy of the proposed algorithm for identifying the modal characteristics of the structure under earthquake excitation. And in the next step, the responses of a ۷۲-story tall concrete structure recorded by accelerometer sensors were used to investigate the seismic effects on the dynamic characteristics of the real structures. The results obtained from the proposed method have been compared with the results obtained from the frequency domain decomposition (FDD) method applied on ambient vibration data. The results suggest that the dynamic characteristics under earthquake and ambient excitation are different from each other, which should be considered in vibration-based monitoring.

نویسندگان

Sadeq Kord

P.hD. Student, Department of Civil Engineering, Amirkabir University of Technology, No. ۳۵۰, Hafez Ave, ۱۵۹۱۶۳-۴۳۱۱, Tehran, Iran

Touraj Taghikhany

Associate Professor, Department of Civil Engineering, Amirkabir University of Technology, No. ۳۵۰, Hafez Ave, ۱۵۹۱۶۳-۴۳۱۱, Tehran, Iran