著者

松本 俊明 植竹 富一 色摩 康弘 中村 孝明

出版者

公益社団法人 日本地震工学会

雑誌

日本地震工学会論文集 (ISSN:18846246)

巻号頁・発行日

vol.19, no.7, pp.7_14-7_26, 2019 (Released:2019-11-29)

参考文献数

26

---

再生可能エネルギーの固定費買取り制度により,配電設備に接続される太陽光発電などの小規模電源設備が増加している.このような分散型電源は,送配電線の事故や災害時の電力供給支障を改善する効果が期待されている.一方,地震災害時には需要家も損傷する可能性が高く,これに伴い常時に比べ需要電力は低下する.需要と供給の差を供給支障と考えれば,分散型電源の供給力や需要家損傷による需要電力低下が,供給支障電力にどのような影響を与えるか,これを把握することは,配電網の防災対策や災害対応を検討する上で必要な課題である.本論では分散型電源が配置された配電網において,需要家損傷を考慮した地震時の供給支障電力の評価方法を提案する.また,発災初動期の電圧変動による配電線の解列を考慮するとともに,配電線のFragility Curveを被災事例に基づき統計的に評価する.提案手法の適用性の検討として,JST-CREST126系統モデルを取上げ,需要家損傷や分散型電源による供給支障への影響を考察する.

著者

植竹 富一 金谷 淳二 土方 勝一郎 加藤 研一 武村 雅之

出版者

一般社団法人日本建築学会

雑誌

学術講演梗概集. B-2, 構造II, 振動, 原子力プラント (ISSN:13414461)

巻号頁・発行日

vol.2006, pp.299-300, 2006-07-31

著者

池田 孝 加藤 研一 植竹 富一 敦賀 隆史

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.73, no.633, pp.1951-1958, 2008-11-30 (Released:2009-10-28)

参考文献数

30

---

Fault models of the 1938 Shioyazaki-oki earthquakes, event 1 (May 23) and event 2 and 3 (Nov. 5), are characterized using the slip distributions on the fault plane by waveform inversion analysis. Stress parameters of each asperity Δσa are estimated as 37MPa for event 1 and 22MPa for event 2 and 3 from empirical Green's function method (EGFM) by simulating the seismic intensity of JMA observation stations which locate in near fault region. Short-period spectral level of event 1 is higher than those of event 2 and 3 which are as high as that of the 1978 Miyagi-ken-oki earthquake. The spatial distribution of seismic intensity 5 for each event is well reproduced by EGFM using the proposed fault model in this study.

著者

佐藤 智美 佐藤 俊明 川瀬 博 植竹 富一

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.63, no.506, pp.83-92, 1998-04-30 (Released:2017-02-02)

参考文献数

32

被引用文献数

2 2

---

Using more than two hundred JMA-87 type strong-motion records we show that pseudo-velocity response spectra are noticeably different from Fourier acceleration spectra in several occasions because response spectra are sensitive to other frequency components or attenuation due to dispersion but insensitive to duration. Therefore, regression coefficients such as magnitude coefficients, attenuation coefficient, and site amplification factors for response spectra and Fourier spectra show clear differences. We conclude that physical characteristics of strong motion cannot always be represented by the regression coefficients for response spectra.

著者

宇佐美 龍夫 植竹 富一 渡辺 健

出版者

歴史地震研究会

雑誌

歴史地震 (ISSN:13499890)

巻号頁・発行日

no.25, pp.81-90, 2010

著者

植竹 富一

出版者

北海道大学大学院理学研究院自然史科学部門(地球物理学)

雑誌

北海道大学地球物理学研究報告 (ISSN:04393503)

巻号頁・発行日

no.73, pp.49-55, 2010-03

---

A deep(H=374 km)earthquake of Mj=6.7 occurred in Kyoto-Oki region on July 16, 2007. Broad-band velocity ground motions during this event were observed at many thermal power stations in the Tokyo bay area. Waveforms observed at the stations of the east side of the Tokyo bay show longer duration than those at the west side of the bay. The apparent frequencies of later arrivals are lower than those of S-wave parts. Velocity waveforms observed in the mountain area and in the bedrock of the basin have short duration and no significant later arrivals. This suggests that the later arrivals were excited by the Kanto basin.

著者

宇佐美 龍夫 濱松 音蔵 久本 壮一 渡邊 健 中村 亮一 植竹 富一

出版者

公益社団法人 日本地震学会

雑誌

地震 第2輯 (ISSN:00371114)

巻号頁・発行日

vol.45, no.3, pp.339-351, 1992-12-24 (Released:2010-03-11)

参考文献数

27

---

For the study of macroscopic characteristics of earthquake, it is necessary to investigate both historical and modern earthquakes from the same point of view. Historical earthquakes present informations on damages only. Modern earthquakes have various kind of data obtained from instrumental observations. Intensity data is common to both old and modern earthquakes. As the first step to study historical earthquakes, we studied the seismic intensity distribution of recent earthquakes, in the Tohoku district, which occurred in the interval from 1926 to 1990. Results are summarized as follows.(1) The isoseismal contours for many earthquakes off the Pacific coast elongate to north and south, and the seismic intensity decays steeply across the line which is almost parallel to the volcanic front. We call this line “Steeply Decay Line of Seismic Intensity (SDLSI)”. On the contrary, the distribution of seismic intensity for shallow inland earthquakes doesn't show this tendency.(2) We investigated the seismic intensity attenuation in the Tohoku district and obtained the next formula, I=A-BXwhere, I is the seismic intensity, X the hypocentral distance. Coefficients A and B are expressed as follows:for earthquakes of G1, G2 and G3 (see Fig. 2)A=0.198+0.679M, A/B=-1332+299.9M (east side of SDLSI), A=0.944+0.589M, A/B=-1329+279.5M (west side of SDLSI).for earthquakes of G4A=-1.315+0.912M, A/B=-410+134.9M(3) For the earthquakes along the plate boundary, we defined relatively low- and high-frequency earthquakes according to the value of MJ-MI, where MJ is JMA magnitude and MI the one determined by comparing observed intensity attenuation data of each earthquake with a curve calculated from formulas in (2). The epicenteral distribution of low- and high-frequency earthquakes does not show clear characteristics. But, off Fukushima Prefecture region, there seems to be a boundary of the high-and low-frequency earthquake's distribution along the plate boundary of about 40km depth. The high-frequency earthquakes are found in the west side of the boundary.

著者

植竹 富一 中村 亮一 宇佐美 龍夫

出版者

歴史地震研究会

雑誌

歴史地震 (ISSN:13499890)

巻号頁・発行日

no.20, pp.233-242, 2005

著者

西村 功 植竹 富一 中村 亮一 菅野 裕一

出版者

一般社団法人日本建築学会

雑誌

学術講演梗概集. B-2, 構造II, 振動, 原子力プラント (ISSN:13414461)

巻号頁・発行日

vol.1995, pp.55-56, 1995-07-20

著者

佐藤 智美 植竹 富一 菅原 良次

出版者

日本建築学会

雑誌

日本建築学会構造系論文集 (ISSN:13404202)

巻号頁・発行日

vol.62, no.493, pp.31-39, 1997

被引用文献数

12 1

---

We propose empirical envelope models of long period strong motion in a period range of 1 to 10 sec using many JMA 87 type records. We make models for five regions in Japan as a function of epicentral distance and site coefficients which represent site effects due to scattered waves or surface waves. Since the envelope is modeled by average and standard deviation of group delay time in narrow frequency bands, dispersion characteristics of surface waves can be simulated. We show the validity of our models by simulating records of the 1983 Nihonkai-chubu earthquake.