滑动支座免震装置的原理及应用

滑动支座免震装置又叫ＴＡＳＳ构法,由日本大成建设公司开发研制,用于建筑物取得显著效果。该装置的免震原理是在建筑物和基础间安装滑动支座。地震时,依靠建筑物与基础之间产生滑移,降低直接作用在建筑物上的地震力及层间变形。１ＴＡＳＳ构法简介１．１免震装置的组成滑动支座免震装置由滑动支座、滑移板及水平弹簧组成（图１）。滑动支座设置在各柱下面,水平弹簧安装在建筑物底面和基础之间。滑动支座分为使用ＰＴＦＥ材（含氟树脂）的刚性滑动支座和在层叠橡胶（由聚四氟乙烯树脂橡胶和钢板相互交叉层叠而成）的底部安装ＰＴＦＥ材的弹…     

2,4,6,8,10,12-六硝基-2,4,6,8,10,12-六氮杂三环[7·3·0·03.7]十二烷酮-5,11放热分解反应的动力学研究

用DSC研究了标题化合物在线性升温条件下的热行为和放热分解反应的动力学参数。结果表明:该反应的微分形式的经验动力学模式函数、表观活化能和指前因子分别为(1-α)-0.506,155.5kJ·mol-1和1013.5s-1,标题化合物的热爆炸临界温度为205.0℃。该反应的ΔS≠,ΔH≠和ΔG≠分别为6.0J·mol-1·K-1,146.5kJ·mol-1和143.7kJ·mol-1。     

Thermochemistry on Coordination Behavior of Neodymium Chloride Hydrate with Diethylammonium Diethyldithiocarbamate

The complex of neodymium chloride lower hydrate with diethylammonium diethyldithiocarbamate (D-DDC) was synthesized conveniently in absolute alcohol and dry N2 atmosphere. The title complex was identified as Et2NH2 [ Nd(S2CNEt2)4] by chemical and elemental analyses and the bonding characteristics of which was characterized by IR. The enthalpies of solution of neodymium chloride hydrate and D-DDC in absolute alcohol at 298.15 K and the enthalpies change of liquid-phase reaction of formation for Et2NH2[ Nd (S2CNEt2)4] at different temperatures were determined by microealorimetry. On the basis of experimental and calculated results, three thermodynamic parameters (the activation enthalpy, the activation entropy and the activation free energy), the rate constant and three kinetic parameters (the apparent activation energy, the pre-exponential constant and the reaction order) of liquid-phase reaction of formation were obtained.The enthalpy change of the solid-phase title reaction at 298.15 K was calculated by a thermochemical cycle.     

FeCrSiB合金激光熔敷中对流传质研究

在FeCrSiB合金激光熔敷层中观察到对流图案,研究了光束对称性、基材对熔层稀释等与对流之间的关系,发现了对流引起的宏观偏析,理想的激光熔敷应具有低稀释率(<5％)     

中稀土铕、钆、铽、镝硝酸盐水合物的制备

<正> 关于中稀土Eu、Gd,Tb、Dy硝酸盐水合物的制备,文献中只有零星报道,且多数来自多元体系。这样,制得的样品常因混有其它成分而不宜用来进行物理化学性质的测定。为此,我们用三种方法制备了它们的16种水合物,并对所得样品进行了表(?)。其中Ln(NO_3)_3·3。5H_2O(Ln=Eu、Gd,Tb、Dy)和Dy(NO_3)_3·3H_2O是文献中未见报道的。     

大悬臂混凝土脊骨梁桥预制悬臂梁施工监测设计

脊骨梁结构是一种特别适合城市高架桥使用的新型结构,其占地少、悬臂大,但由于薄壁悬臂的施工难度大,使这种桥型结构的推广受到限制,在兴港高架桥脊骨梁结构的设计中,采用了一种新的组合形式的悬臂梁,文中介绍了悬臂梁受力的实际监测情况。     

Enthalpies of Solution of Complexes of Rare Earth Nitrate with L-α-Histidine in Water

The enthalpies of solution in water of complexes of RE(NO3)3(RE = La - Nd, Sm- Lu, Y) with L-α-Histidine (His) were measured at 298.15 K. The standard enthalpies of formation of RE(His)^3 (aq) were calculated. The “tetrad effect” regularity was observed from the curve, which is the enthalpies of solution plotted against the atomic numbers of the elements in lanthanide series.     

重稀土硝酸盐与二甲基甲酰胺配合物的研究

甲苯为溶剂,重稀土水合硝酸盐与二甲基甲酰胺(DMF)反应制得了九种固体配合物,组成为Ln(NO_3)_3(DMF)_3。研究了它们的红外光谱、X射线粉末衍射、热谱等性质.     

Phase Chemistry of the Complexes of RE Amino Acids

Forty-three phase diagrams of ternary system concerning rare earth salts, a-amino acids and water,which were constructed by phase equilibrium methods, were expounded. The influences of the factors such as cations, anions, the structure of amino acids, temperature on the phase diagrams were discussed. Under the guidance of phase equilibrium results, over 150 new solid complexes were prepared. IR, reflecting, UV, FS, and Raman spectra for these complexes were investigated and the regularity of ““tripartite effect“, “tetrad effect“,“Nephelanxeric effect“, “Oddo-Harkins“ was observed. Thermal decomposition processes of the complexes were confirmed. Based on the comparison with the known crystal structures of rare earth-amino acid-complexes, an estimarion method for predicting the crystal structure data of series complexes was founded. The constant volume combustion energies of the complexes were determined by RBC-1 type rotating bomb calorimeter. The standard enthalpies of combustion and standard enthalpies of formation were calculated for these complexes.