Zobrazeno 1 - 10
of 278
pro vyhledávání: '"Takashi Nagao"'
Autor:
Kenichiro Miyashita, Takashi Nagao
Publikováno v:
Engineering, Technology & Applied Science Research, Vol 14, Iss 1 (2024)
The Conventional Design Method (CDM) for anchored sheet pile quay walls cannot accurately calculate the anchor pile deformation, partly because it does not properly consider the subgrade reaction. This study aims to clarify the subgrade reaction char
Externí odkaz:
https://doaj.org/article/c2a5aaf72863442fbc5e308bf7a51dd9
Autor:
Takashi Nagao, Xiao Ma
Publikováno v:
Engineering, Technology & Applied Science Research, Vol 13, Iss 3 (2023)
The amplification characteristics of seismic motion are determined by the ground structure. In design practice, the ground is assumed to be horizontally stratified. However, the actual ground forms irregular sedimentary structures and the propagation
Externí odkaz:
https://doaj.org/article/102a4a285a2b41ae8d0b93d971b6f3a8
Autor:
Afif Navir Refani, Takashi Nagao
Publikováno v:
Applied Sciences, Vol 13, Iss 19, p 10936 (2023)
Fiber-based finite element analysis (FB-FEA) has been widely recognized for its ability to reproduce experimental results and is also a reliable method for evaluating the nonlinear seismic response of pile-supported wharves (PSWs). Design practice of
Externí odkaz:
https://doaj.org/article/6d4f823dbdd0412aa045e43b06bbf5e6
Autor:
Kenichiro Miyashita, Takashi Nagao
Publikováno v:
Engineering, Technology & Applied Science Research, Vol 13, Iss 1 (2023)
In the seismic design of quay walls, it is necessary to evaluate the deformation of the walls during earthquakes as well as the safety of structural members. However, conventional seismic design methods for sheet pile quay walls cannot accurately det
Externí odkaz:
https://doaj.org/article/991b39352edd4645a587b6869a071261
Autor:
Christino Boyke, Takashi Nagao
Publikováno v:
Applied Sciences, Vol 13, Iss 6, p 3629 (2023)
Frame analysis (FA) is known for its efficiency and low computer resource requirements. However, compared to finite element analysis (FEA), the applicability of FA for the seismic performance assessment of pile-supported wharves (PSWs) is limited, pa
Externí odkaz:
https://doaj.org/article/c16941bfb4f541ebb8a5f5f02f8f7492
Autor:
Kohki Uno, Takashi Nagao, Keiichi Maeda, Hanindyo Kuncarayakti, Masaomi Tanaka, Koji S. Kawabata, Tatsuya Nakaoka, Miho Kawabata, Masayuki Yamanaka, Kentaro Aoki, Keisuke Isogai, Mao Ogawa, Akito Tajitsu, Ryo Imazawa
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 204 (2023)
Type IIn/Ia-CSM supernovae (SNe IIn/Ia-CSM) are classified by their characteristic spectra, which exhibit narrow hydrogen emission lines originating from strong interaction with a circumstellar medium (CSM) together with broad lines of intermediate-m
Externí odkaz:
https://doaj.org/article/ec6114b3dace43459fe605bc4abebd6d
Autor:
Kohki Uno, Keiichi Maeda, Takashi Nagao, Tatsuya Nakaoka, Kentaro Motohara, Akito Tajitsu, Masahiro Konishi, Shuhei Koyama, Hidenori Takahashi, Masaomi Tanaka, Hanindyo Kuncarayakti, Miho Kawabata, Masayuki Yamanaka, Kentaro Aoki, Keisuke Isogai, Kenta Taguchi, Mao Ogawa, Koji S. Kawabata, Yuzuru Yoshii, Takashi Miyata, Ryo Imazawa
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 203 (2023)
We have performed intensive follow-up observations of a Type IIn/Ia-CSM supernova (SN IIn/Ia-CSM), 2020uem, with photometry, spectroscopy, and polarimetry. In this paper, we report on the results of our observations focusing on optical/near-infrared
Externí odkaz:
https://doaj.org/article/4687f5a687264f0397919300afdf77c7
Autor:
Afif Navir Refani, Takashi Nagao
Publikováno v:
Applied Sciences, Vol 13, Iss 3, p 1507 (2023)
Prestressed concrete piles with closed-ended circular hollow sections (spun piles) are sometimes used as foundations for pile-supported wharves. Due to a reduction in the rebar area, concrete compressive strength, yield strength of PC-bar, and bond s
Externí odkaz:
https://doaj.org/article/620b1acd1861479b959a99a63387e8d8
Autor:
Christino Boyke, Takashi Nagao
Publikováno v:
Applied Sciences, Vol 12, Iss 14, p 7266 (2022)
Pile-supported wharf (PSW) is one of the primary port structures and is often damaged by earthquakes. To mitigate the risk of seismic damage to a PSW, its seismic performance should be thoroughly assessed. This study aimed to examine the impact of gr
Externí odkaz:
https://doaj.org/article/5b38298f81fc43079843d01ec0881230
Publikováno v:
Applied Sciences, Vol 12, Iss 4, p 1963 (2022)
In Indonesia, infrastructure, such as port facilities, has been damaged by earthquakes. Therefore, evaluating rational earthquake ground motions (EGMs) for seismic design is necessary to mitigate earthquake disasters in the future. The EGMs in the In
Externí odkaz:
https://doaj.org/article/7283a087f59247acb5480ffdac29de1b