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| 1 | Numerical simulation on the seismic absorption effect of the cushion in rigid-pile composite foundation显示文摘In order to quantitatively study the seismic absorption effect of the cushion on a superstructure, a numerical simulation and parametric study are carried out on the overall FEA model of a rigid-pile composite foundation in ABAQUS. A simulation of a shaking table test on a rigid mass block is first completed with ABAQUS and EERA, and the effectiveness of the Drucker-Prager constitutive model and the finite-infinite element coupling method is proved. Dynamic time-history analysis of the overall model under frequent and rare earthquakes is carried out using seismic waves from the El Centro, Kobe, and Bonds earthquakes. The different responses of rigid-pile composite foundations and pile-raft foundations are discussed. Furthermore, the influence of thickness and modulus of cushion, and ground acceleration on the seismic absorption effect of the cushion are analyzed. The results show that: 1) the seismic absorption effect of a cushion is good under rare earthquakes, with an absorption ratio of about 0.85; and 2) the seismic absorption effect is strongly affected by cushion thickness and ground acceleration. | Han Xiaolei Li Yaokun Ji Jing Ying Junhao Li Weichen Dai Baicheng | 2016 | Earthquake Engineering and Engineering Vibration2016，15，2： | 5 |
| 2 | Experimental study on the shear behavior of the interface between cushion materials and the concrete raft显示文摘Cushion is a layer of granular materials between the raft and the ground. The shear behavior of the interface between the cushion and the raft may influence the seismic performance of the superstructure. In order to quantify such influences, horizontal shear tests on the interfaces between different cushion materials and concrete raft under monotonic and cyclic loading were carried out. The vertical pressure P_v, material type and cushion thickness h_c were taken as variables. Conclusions include: 1) under monotonic loading, P_v is the most significant factor; the shear resistance P_(hmax) increases as P_v increases, but the normalized factor of resistance μ_n has an opposite tendency; 2) for the materials used in this study, μ_n varies from 0.40 to 0.70, the interface friction angle δ_s varies from 20° to 35°, while u_(max) varies from 3 mm to 15 mm; 3) under cyclic loading, the interface behavior can be abstracted as a 'three-segment' back-bone curve, the main parameters include μ_n, the displacement u_1 and stiffness K_1 of the elastic stage, the displacement u_2 and stiffness K_2 of the plastic stage; 4) by observation and statistical analysis, the significance of different factors, together with values of K_1, K_2 and μ_n have been obtained. | Li Yaokun Han Xiaolei Khaled Galal Ji Jing | 2018 | Earthquake Engineering and Engineering Vibration2018，17，1： | 1 |
| 3 | Synthesis of polyoxometalate-polymer hybrid polymers and their hybrid vesicular assembly显示文摘 | HAN Yaokun XlAO Yu ZHANG Zijian | 2009 | Macromolecules2009，42，17： | 1 |
| 4 | Macromolecule-to-amphiphile conversion process of a polyoxometalate-polymer hybrid and assembled hybrid vesicles显示文摘 | XIAO Yu HAN Yaokun XIA Nan | 2012 | Chemistry:A European Journal2012，18，11： | 1 |
| 5 | Effect of ternary transition metal sulfide FeNi_(2)S_(4)on hydrogen storage performance of MgH_(2)显示文摘Hydrogen storage is a key link in hydrogen economy,where solid-state hydrogen storage is considered as the most promising approach because it can meet the requirement of high density and safety.Thereinto,magnesium-based materials(MgH_(2))are currently deemed as an attractive candidate due to the potentially high hydrogen storage density(7.6 wt%),however,the stable thermodynamics and slow kinetics limit the practical application.In this study,we design a ternary transition metal sulfide FeNi_(2)S_(4)with a hollow balloon structure as a catalyst of MgH_(2)to address the above issues by constructing a MgH_(2)/Mg_(2)NiH_(4)-MgS/Fe system.Notably,the dehydrogenation/hydrogenation of MgH_(2)has been significantly improved due to the synergistic catalysis of active species of Mg_(2)Ni/Mg_(2)NiH_(4),MgS and Fe originated from the MgH_(2)-FeNi_(2)S_(4)composite.The hydrogen absorption capacity of the MgH_(2)-FeNi_(2)S_(4)composite reaches to 4.02 wt%at 373 K for 1 h,a sharp contrast to the milled-MgH_(2)(0.67 wt%).In terms of dehydrogenation process,the initial dehydrogenation temperature of the composite is 80 K lower than that of the milled-MgH_(2),and the dehydrogenation activation energy decreases by 95.7 kJ·mol-1 compared with the milled-MgH_(2)(161.2 kJ·mol^(-1)).This method provides a new strategy for improving the dehydrogenation/hydrogenation performance of the MgH_(2)material. | Yaokun Fu Lu Zhang Yuan Li Sanyang Guo Han Yu Wenfeng Wang Kailiang Ren Wei Zhang Shumin Han | 2023 | Journal of Magnesium and Alloys2023，11，8： | 0 |
| 6 | Catalytic effect of MOF-derived transition metal catalyst FeCoS@C on hydrogen storage of magnesium显示文摘The introduction of the heterogeneous catalysts with high activity can significantly improve hydrogen storage performance of MgH_(2),therefore,in this paper,we synthesize a carbon-supported transition metal compound,FeCoS@C derivative from ZIF-67,by utilizing the in situ formed C dispersive multiphase Mg_(2)Co,α-Fe,Co_(3)Fe_(7),and MgS to implement catalysis to MgH_(2).Noteworthily,MgH_(2)-FeCoS@C rapidly ab-sorbs 6.78 wt%H_(2)within 60 s at 573 K and can also absorb 4.56 wt%H_(2)in 900 s at 473 K.Besides,the addition of FeCoS@C results in decreasing of the initial dehydrogenation temperatures of MgH_(2)from 620 to 550 K.The dehydrogenation activation energy of MgH_(2)decreases from 160.7 to 91.9 kJ mol^(-1).Studies show that the Mg_(2)Co,α-Fe,and Co_(3)Fe_(7)act as“hydrogen channels”to accelerate hydrogen transfer due to the presence of transition metals,and MgS with excellent catalytic effect formed from MgH_(2)-FeCoS@C provides a strong and stable catalytic effect.Besides,the carbon skeleton obtained by the carbonization of ZIF-67 not only serves as a dispersion for the multiphase catalytic system,but also provides more active sites for the catalysts.Our study shows that the multiphase and multiscale catalytic system provides an effective strategy for improving the hydrogen storage performance of MgH_(2). | Yaokun Fu Lu Zhang Yuan Li Sanyang Guo Zhichao Yu Wenfeng Wang Kailiang Ren Qiuming Peng Shumin Han | 2023 | Journal of Materials Science & Technology2023，，7： | 0 |
| 7 | Prescription Design and Preparation Process of Paeonol Bead Popping Gum with Hypoglycemic Effect显示文摘[Objectives]To develop a paeonol bead popping gum with hypoglycemic effect.[Methods]The paeonol bead popping gum was prepared by the'two-step method',that is,the pill core was prepared by the guttate pill method,and then the coating was cured by sodium alginate solution and CaCl_(2) solution.The single factor method was used to determine the effects of PEG-4000:paeonol dosage ratio,dropper diameter,condensation time,dropping distance,melting temperature on the comprehensive score of paeonol guttate pill,and the effects of sodium alginate solution concentration,CaCl_(2) solution concentration,number of coating layers,drying time on the comprehensive score of popping gum.Finally,the optimal process was determined and verified by orthogonal experiment method.[Results]When the dosage ratio of PEG-4000:paeonol was 4∶1,the dropper diameter was 4 mm,the condensation time was 5 min,the dropping distance was 6 cm,and the melting temperature was 90℃,the quality of the prepared guttate pill was the optimal.When the concentration of sodium alginate solution was 0.02 g/mL,the concentration of CaCl_(2) solution was 0.25 g/mL,the number of coating layers was 3,and the drying time was 25 min,the appearance and comprehensive score of the obtained popping beads were the optimal.[Conclusions]This study is expected to provide some reference and basis for the development and utilization of hypoglycemic products of traditional Chinese medicine. | Fuhao HU Yicheng WANG Hui YANG Yaokun XIONG Ming YANG Xinli LIANG Fei HAN | 2022 | Medicinal Plant2022，13，5： | 0 |
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