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| 1 | Effects of shear keys on nonlinear seismic responses of an arch-gravity dam显示文摘In the paper,the added tangential nonlinear springs are introduced to represent the effects of one-way and two-way shear keys. The added tangential stiffness coefficient is relative to the joint opening and the relative tangential movement and determined numerically by using a refined model of shear keys.The user subroutine of nonlinear spring elements has been implemented into ABAQUS program.The seismic responses of an arch-gravity dam are mainly examined.It is shown by the results that a significant increase of about 17%-30%in joint opening can be observed for the dam with one-way shear keys;the two-way shear keys are beneficial to restrain the sliding displacement along both the radial and vertical directions,whereas the one-way shear keys mainly restrain the displacement along the radial direction;for the dam with shear keys,the maximum arch stress is increased,the cantilever stress is reduced,and the location of the maximum cantilever stress is also moved from the dam heel to the midheight of the cantilever. | JIANG ShouYan 1,DU ChengBin 1 &YUAN JuWei 2 1 Department of Engineering Mechanics,Hohai University,Nanjing 210098,China 2 Jiangsu Hongji Science and Technology Company.,Ltd.,Nanjing 210008,China | 2011 | Science China(Technological Sciences)2011，54，S1： | 2 |
| 2 | Comprehensive Multi-Level Exploration of Buried Active Faults:an Example of the Yinchuan Buried Active Fault显示文摘The paper introduces the steps and methods of multi-approach,multi-level exploration of buried faults in thick Quaternary sediment regions by taking the test exploration of the Yinchuan active fault as example.Based on the comprehensive analyses of previous data,we choose the Xinqushao Village of Xingqing District of Yinchuan City as the test site for the comprehensive exploration.Firstly,we adopted shallow seismic investigation with group intervals of 10m,5m and 1m to gradually trace layer by layer the master fault of the Yinchuan buried fault from a deep depth to a shallow depth where drilling could be used.Then,with composite geological profile drilling,we determined the precise location and dip angle of the fault.The drilling show the buried depth of the upper offset point is 8.3m.Finally,large-scale trenching revealed that the actual buried depth of the upper offset point of the fault is 1.5m from the ground surface and there are paleoearthquake events of 5 stages.Combined with the preliminary result of corresponding sample age,we conclude the Yinchuan buried fault is a mid to late Holocene active fault. | Chai Chizhang Meng Guangkui Du Peng Wang Yin Liu Baojin Shen Weihua LeiQiyun Liao Yuhua Zhao Chengbin Feng Shaoying Zhang Xuehui Xie Xiaofeng | 2007 | Earthquake Research in China2007，21，3： | 1 |
| 3 | Design, testing and analysis of a novel composite magnetorheological fluid clutch 显示文摘 | Dai Shangqiu Du Chengbin Yu Guojun | 2013 | Journal of Intelligent Material Systems and Structures2013，24，14： | 1 |
| 4 | A Magnetic Flux Leakage Study of a Self-decoupling Magnetorheological Damper 显示文摘 | DU Chengbin WAN Faxue YU Guojun | 2011 | Smart Materials and Structures2011，20，6： | 1 |
| 5 | Numerical simulation of aggregate shapes of two dimensional concrete and its application 显示文摘 | Du Chengbin Sun Liguo | 2007 | International Journal of Aerospace Engineering ASCE2007，20，3： | 1 |
| 6 | Numerical simulation of aggregate shapes of two dimensional concrete and its application 显示文摘 | Du Chengbin Sun Liguo | 2007 | International Journal of Aerospace Engineering2007，20，3： | 1 |
| 7 | Design,Testing and Analysis of a Novel Composite Mag-netorheological Fluid Clutch显示文摘 | Dai Shangqiu Du Chengbin Yu Guojun | 2013 | Journal of Intelli-gent Material Systems and Structures2013，24，14： | 1 |
| 8 | Design,testing and analysis of a novel composite magnetorheological fluid clutch显示文摘 | DAI Shangqiu DU Chengbin YU Guojun | 2013 | Journal of Intelligent Material Systems and Structures2013，24，14： | 1 |
| 9 | The SARS-CoV-2 spike L452R-E484Q variant in the Indian B.1.617 strain showed significant reduction in the neutralization activity of immune sera显示文摘To assess the impact of the key non-synonymous amino acid substitutions in the RBD of the spike protein of SARS-CoV-2 variant B.1.617.1(dominant variant identified in the current India outbreak)on the infectivity and neutralization activities of the immune sera,L452R and E484Q(L452R-E484Q variant),pseudotyped virus was constructed(with the D614G background).The impact on binding with the neutralizing antibodies was also assessed with an ELISA assay.Pseudotyped virus carrying a L452R-E484Q variant showed a comparable infectivity compared with D614G.However,there was a significant reduction in the neutralization activity of the immune sera from non-human primates vaccinated with a recombinant receptor binding domain(RBD)protein,convalescent patients,and healthy vaccinees vaccinated with anmRNA vaccine.In addition,there was a reduction in binding of L452R-E484Q-D614G protein to the antibodies of theimmune sera fromvaccinated nonhuman primates.These results highlight the interplay between infectivity and other biologic factors involved in the natural evolution of SARS-CoV-2.Reduced neutralization activities against the L452R-E484Q variant will have an impact on health authority planning and implications for the vaccination strategy/newvaccine development. | Gen Li Zhongcheng Zhou Peng Du Meixing Yu Ning Li Xinxin Xiong Hong Huang Zhihai Liu Qinjin Dai Jie Zhu Chengbin Guo ShanyunWu Daniel T.Baptista-Hon Man Miao LamWai Ming Yong Wu Fanxin Zeng Charlotte L.Zhang Edward D.Zhang Haifeng Song Jianghai Liu Johnson Yiu-Nam Lau Andy P.Xiang Kang Zhang | 2021 | Precision Clinical Medicine2021，4，3： | 0 |
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