Maximum Response Evaluation of Traditional Wooden Houses Based on Microtremor Measurements

Sugino, Mina; Ohmura, Saki; Tokuoka, Satomi; Hayashi, Yasuhiro

doi:10.3130/aijs.81.1869

Cited by 7 publications

(4 citation statements)

References 5 publications

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“…In the case of the of 1/1000 rad deflection angle, it was also confirmed that the dominant frequencies of the lower modes of vibration declined to approximately 65%‐75% of the frequencies obtained by micro tremor measurement. This result was in good agreement with previous studies on conventional and traditional houses with the wall system. However, for the pagodas and main temple halls, the frequency declined to approximately 80%‐90% of the micro tremor measurement at a deflection angle of 1/1500‐1/1000 rad .…”

Section: Discussionsupporting

confidence: 93%

“…Micro tremor measurement is a nondestructive method, and is often performed on building structures. However, it is known that traditional timber structures exhibit strong nonlinearity even in the elastic range . This research aims to clarify the vibration characteristics of traditional timber buildings by comparing the micro tremor measurement, earthquake response monitoring, and analysis results, to reveal the validity and scope of application with regard to the results of nondestructive vibration measurements.…”

Section: Introductionmentioning

confidence: 99%

“…However, the relationship between micro tremor vibration and the seismic response of structures has not been clarified thoroughly, and particularly with regard to traditional timber structures. A thorough report by Sugino et al discussed the amplitude dependence of the dominant frequency of traditional timber houses in Kyoto. It was demonstrated that the dominant frequency during seismic vibration is approximately 50%‐70% in comparison with the frequency obtained by micro tremor measurement.…”

Section: Introductionmentioning

confidence: 99%

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Vibration measurement and structural performance evaluation of a 17th century timber guest house in Japan

Toyoda

Fujita

Toko

2018

Japan Architectural Review

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To clarify the actual structural performance of an existing traditional timber structure in Japan, vibration measurements were carried out at a 17th century timber guest house (Gekkouden of Gokokuji temple). The results of the micro tremor measurement, earthquake monitoring, and analysis are discussed in this paper. For minute angles of less than 1/5000 rad, it was revealed through earthquake monitoring that each dominant frequency was strongly dependent on the vibration amplitude. It was also confirmed that the dominant frequencies of the lower vibration modes in 1/1000 rad declined to 65%‐75% of the frequencies obtained through micro tremor measurement. We propose a structural model that consists of a joint spring, column, beam, and hanging wall, based on previously reported experiments. In this study, it was clarified that the dominant frequencies determined by the analysis of the proposed structural model were in good agreement with the frequencies obtained through earthquake monitoring.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vibration measurement and structural performance evaluation of a 17th century timber guest house in Japan

Toyoda

Fujita

Toko

2018

Japan Architectural Review

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“…Past observations of damaging earthquakes in Japan showed that the strong ground motions in the frequency range between 0.5 and 1 Hz greatly affect wooden buildings (e.g., Kitagawa and Hiraishi 2004;Sakai et al 2008). The natural frequency of low-rise wooden buildings is between 2 and 10 Hz (e.g., Sugino et al 2016a), but the frequency may shift to lower values (around 1 Hz) when they are subjected to strong shaking. Therefore, larger damage was expected along the Akitsu river where the frequencies around 1 Hz are dominant.…”

Section: Introductionmentioning

confidence: 99%

Subsurface velocity structure and site amplification characteristics in Mashiki Town, Kumamoto Prefecture, Japan, inferred from microtremor and aftershock recordings of the 2016 Kumamoto earthquakes

Hayashida

Yamada

et al. 2018

Earth Planets Space

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In order to investigate the seismic velocity structure in the region of concentrated severe damage during the 2016 Kumamoto earthquake sequence, we conducted continuous seismic observations in the central area of Mashiki Town, Kumamoto Prefecture. During 4 days of observations at eight temporary sites, 2 months after the mainshock, recordings from 30 aftershocks (1.7 ≤ M j ≤ 4.3, 1.9 km ≤ depth ≤ 13.5 km) were obtained. The aftershock data showed that site amplifications at approximately 1 Hz are dominant in a zone where almost no buildings were damaged along the Akitsu riverside, whereas site amplifications at higher than 3 Hz are observed in the heavily damaged zones. Our data also showed that the peak acceleration and velocity amplitudes, as well as seismic intensities for the small events in the less damaged zone, are clearly larger than those in the damaged zones, implying that the damage distribution is inconsistent with site response based on linear site amplifications. The estimated phase velocities of Rayleigh waves using the aftershock and microtremor data show dispersive characteristics in the lower frequency range (0.26 ≤ f ≤ 1.27 Hz), but the values are substantially smaller than those derived from the P-S logging model at the nearest KiK-net strong-motion observation station KMMH16. The derived microtremor horizontal-to-vertical spectral ratios and earthquake radial-to-vertical (R/V) spectral ratios show common distinct peaks at around 0.4 Hz, which are possibly related to the response of deep sedimentary layers beneath the area. The refined velocity structure model that better accounts for both the phase velocity and common dominant peak indicates that the values of S wave velocity (Vs) above the bedrock layer (Vs = 2700 m/s) are smaller than those inferred from the logging model and the depth to the bedrock layer could be much deeper (about 600 m) in comparison with the logging model (234 m). The derived R/V spectral ratio at station KMMH16 also shows a distinct peak at 0.4 Hz, suggesting that there is no large difference of deep sedimentary structure between the observation area and station KMMH16. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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1596年慶長伏見地震における伝統木造建物被害の分析

Sugino

TANISHIMA

TAKAISHI

et al. 2023

Journal of Structural Engineering B

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Maximum Response Evaluation of Traditional Wooden Houses Based on Microtremor Measurements

Cited by 7 publications

References 5 publications

Vibration measurement and structural performance evaluation of a 17th century timber guest house in Japan

Vibration measurement and structural performance evaluation of a 17th century timber guest house in Japan

Subsurface velocity structure and site amplification characteristics in Mashiki Town, Kumamoto Prefecture, Japan, inferred from microtremor and aftershock recordings of the 2016 Kumamoto earthquakes

1596年慶長伏見地震における伝統木造建物被害の分析

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