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Rocking Amplification and Vector-Valued Intensity Measures
Rocking motion has many advantages as a seismic isolation technique. However, it is also particularly sensitive to characteristics of the ground excitation. The aim of this study is to reveal strong ground motion parameters that are critical to the seismic response of different rigid rocking configurations. The examined structures are assumed to undergo planar rocking motion without sliding and bouncing. Furthermore, this study considers only cases where, during a ground excitation, the structure initiates rocking motion and does not overturn. To this end, it utilises a suite of (natural) recorded earthquakes, regardless of whether they contain distinguishable pulses throughout their time history. The analysis combines different earthquake parameters that hinge on intensity, duration, frequency, and energy-input characteristics of the ground excitation, formulates pertinent vector-valued intensity measures (IMs) and examines their correlation with the peak rocking response. The examined IMs are evaluated with respect to their ability to reduce the dispersion of the peak response in regression analysis. Importantly, the IMs derive from a dimensionless description of the rocking problem following principles of dimensional analysis. The results unveil vector-valued IMs more efficient than scalar IMs and propose original probabilistic seismic demand models that estimate the peak rocking response with higher fidelity.
Rocking Amplification and Vector-Valued Intensity Measures
Rocking motion has many advantages as a seismic isolation technique. However, it is also particularly sensitive to characteristics of the ground excitation. The aim of this study is to reveal strong ground motion parameters that are critical to the seismic response of different rigid rocking configurations. The examined structures are assumed to undergo planar rocking motion without sliding and bouncing. Furthermore, this study considers only cases where, during a ground excitation, the structure initiates rocking motion and does not overturn. To this end, it utilises a suite of (natural) recorded earthquakes, regardless of whether they contain distinguishable pulses throughout their time history. The analysis combines different earthquake parameters that hinge on intensity, duration, frequency, and energy-input characteristics of the ground excitation, formulates pertinent vector-valued intensity measures (IMs) and examines their correlation with the peak rocking response. The examined IMs are evaluated with respect to their ability to reduce the dispersion of the peak response in regression analysis. Importantly, the IMs derive from a dimensionless description of the rocking problem following principles of dimensional analysis. The results unveil vector-valued IMs more efficient than scalar IMs and propose original probabilistic seismic demand models that estimate the peak rocking response with higher fidelity.
Rocking Amplification and Vector-Valued Intensity Measures
Lecture Notes in Civil Engineering
Chouw, Nawawi (editor) / Zhang, Chunwei (editor) / Giouvanidis, A. I. (author) / Dimitrakopoulos, E. G. (author)
Australasian Conference on the Mechanics of Structures and Materials ; 2023 ; Auckland, New Zealand
Proceedings of the 26th Australasian Conference on the Mechanics of Structures and Materials ; Chapter: 65 ; 751-761
2024-09-03
11 pages
Article/Chapter (Book)
Electronic Resource
English
Rocking spectrum intensity measures for seismic assessment of rocking rigid blocks
| British Library Online Contents | 2017
Rocking spectrum intensity measures for seismic assessment of rocking rigid blocks
| British Library Online Contents | 2017
Rocking spectrum intensity measures for seismic assessment of rocking rigid blocks
| British Library Online Contents | 2017
Rocking spectrum intensity measures for seismic assessment of rocking rigid blocks
| British Library Online Contents | 2017