期刊
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
卷 164, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.soildyn.2022.107641
关键词
Ground motion duration; Truncation of ground motion; Period elongation; Time history analysis; Reduction of computational time
This study proposed a novel strong ground motion duration to truncate the head and tail weak signals of records before time history analysis (THA) in order to reduce the calculation time. By comparing with other definitions of durations, the results show that the proposed duration has significant time-saving procedure and reliable computation results on THA.
As a widely used dynamic computation method for seismic response analysis of structures, time history analysis (THA) can be a time-consuming procedure in some situations. In order to reduce the calculation time, this study proposed a novel strong ground motion duration which can truncate the head and tail weak signals of records before THA. The initial point of proposed duration refers to the concept of bracketed duration, while the termination point is determined by the maximum displacement responses of equivalent single-degree-of-freedom (SDOF) systems of the structure. The relationship between the fundamental period and period-lengthening level of structure is counted from previous research and fitted with a formula which is used to compute the period range of equivalent SDOF systems. After comparing the structural responses and time-saved percentage of truncated records by proposed duration with those by other definition of durations, results prove that the pro-posed duration has significant time-saving procedure and reliable computation results on THA.
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