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| 1 | Recording-based identification of site liquefaction显示文摘Reconnaissance reports and pertinent research on seismic hazards show that liquefaction is one of the key sources of damage to geotechnical and structural engineering systems. Therefore, identifying site liquefaction conditions plays an important role in seismic hazard mitigation. One of the widely used approaches for detecting liquefaction is based on the time-frequency analysis of ground motion recordings, in which short-time Fourier transform is typically used. It is known that recordings at a site with liquefaction are the result of nonlinear responses of seismic waves propagating in the liquefied layers underneath the site. Moreover, Fourier transform is not effective in characterizing such dynamic features as time-dependent frequency of the recordings rooted in nonlinear responses. Therefore, the aforementioned approach may not be intrinsically effective in detecting liquefaction. An alternative to the Fourier-based approach is presented in this study,which proposes time-frequency analysis of earthquake ground motion recordings with the aid of the Hilbert-Huang transform (HHT), and offers justification for the HHT in addressing the liquefaction features shown in the recordings. The paper then defines the predominant instantaneous frequency (PIF) and introduces the PIF-related motion features to identify liquefaction conditions at a given site. Analysis of 29 recorded data sets at different site conditions shows that the proposed approach is effective in detecting site liquefaction in comparison with other methods. | 胡聿贤 张郁山 梁建文 Ray Ruichong Zhang | 2005 | Earthquake Engineering and Engineering Vibration2005，4，2： | 2 |
| 2 | Wind-induced vibration characteristics of Nanjing TV tower 显示文摘 | Feng M Q Zhang Ruichong | 1997 | International Journal of Non-Linear Mechanics1997，32，4： | 1 |
| 3 | Extra-hepatic portal vein aneurysm: A case report, overview of the literature and suggested management algorithm显示文摘 | Ruichong Ma Anita Balakrishnan Teik Choon See | 2012 | Int J Surg Case Rep2012，3，11： | 1 |
| 4 | Wind-induced vibration characteristics of Nanjing TV tower显示文摘 | Feng M Q Zhang Ruichong | 1997 | International Journal of Non-linear Mechanics1997，32，4： | 1 |
| 5 | Hilbert-Huang tansform analysis of dynamic and earthquake motion recordings显示文摘 | ZHANG Ruichong MA Shuo SAFAK E HARTZELL S | 2003 | Journal of Engineering Mechanics2003，129，8： | 1 |
| 6 | Hilbert-Huang tansform analysis of dynamic and earthquake motion recordings显示文摘 | Zhang Ray Ruichong Ma Shuo Safak E | 2003 | Journal of Engineering Mechanics2003，129，8： | 1 |
| 7 | Hilbert-Huang transform analysis of dynamic and earthquake motion recordings显示文摘 | Zhang Ruichong Ma Shuo SAFAK E | 2003 | Journal of Engineering Mechanice2003，129，8： | 1 |
| 8 | Interpretation and application of Hilbert-Huang tranformation for seismeic performance analyses显示文摘 | Zhang Ruichong Ma shuo | 2003 | Technical Council on Lifeline Earthquake Engineering Monograph2003，，25： | 1 |
| 9 | Vibration analysis of medical devices with a calibrated FEA model显示文摘 | Jingshu Wu Ray Ruichong Zhang Steve Radons etc | 2002 | Computer &Structures2002，80，： | 1 |
| 10 | Extra-hepatic portal vein aneurysm: A case report, overview of the literature and suggested management algorithm显示文摘 | Ruichong Ma Anita Balakrishnan Teik Choon See Siong Seng Liau Raaj Praseedom Asif Jah | 2012 | International Journal of Surgery Case Reports2012，，11： | 1 |
| 11 | Hilbert-Huang transform analysis of dynamicand earthquake motion recordings显示文摘 | Ray Ruichong Zhang | 2003 | Journal of Engineering Mechanics2003，129，8： | 1 |
| 12 | Study on creep deformation and energy development of underground surrounding rock under four‐dimensional support显示文摘There is an urgent need to develop optimal solutions for deformation control of deep high‐stress roadways,one of the critical problems in underground engineering.The previously proposed four‐dimensional support(hereinafter 4D support),as a new support technology,can set the roadway surrounding rock under three‐dimensional pressure in the new balanced structure,and prevent instability of surrounding rock in underground engineering.However,the influence of roadway depth and creep deformation on the surrounding rock supported by 4D support is still unknown.This study investigated the influence of roadway depth and creep deformation time on the instability of surrounding rock by analyzing the energy development.The elastic strain energy was analyzed using the program redeveloped in FLAC3D.The numerical simulation results indicate that the combined support mode of 4D roof supports and conventional side supports is highly applicable to the stability control of surrounding rock with a roadway depth exceeding 520 m.With the increase of roadway depth,4D support can effectively restrain the area and depth of plastic deformation in the surrounding rock.Further,4D support limits the accumulation range and rate of elastic strain energy as the creep deformation time increases.4D support can effectively reduce the plastic deformation of roadway surrounding rock and maintain the stability for a long deformation period of 6 months.As confirmed by in situ monitoring results,4D support is more effective for the long‐term stability control of surrounding rock than conventional support. | Zhanguo Ma Junyu Sun Peng Gong Pengfei Yan Nan Cui Ruichong Zhang | 2024 | Deep Underground Science and Engineering2024，3，1： | 0 |
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