Research progress of binderless cemented carbide;
无粘结剂硬质合金的研究进展
Sintering,as the most important process in preparation of binderless C/C composites,was investigated,in which sintering approach and scheme was closely related with the properties of final product.
对无粘结剂C/C复合材料而言 ,烧结是整个制备工艺过程中最为关键的一个环节 ,烧结制度是否合理直接影响制品的最终质量和性能 。
Experimental results show that the Jingmen petroleum coke is more suitable as base carbon resource for the preparation of binderless C/C composites than others employed.
研究了在相同的工作制度下 ,基体炭 (生石油焦 )的热物理性质 ,机械化学处理后的主要特征 (粒径、比表面、含氧官能团 ) ,结果表明 ,在所选用的基体炭源中 ,荆门生焦更适合作为无粘结剂 C/C复合材料的基体
Design and Model Setting of Unbonded Post-tensioned Hybrid Wall;
后张无粘结预应力装配式短肢剪力墙设计及建模
Lateral load behavior of unbonded post-tensioned coupled concrete wall subassemblages;
后张无粘结预应力装配混凝土联肢抗震墙的连梁组合体抗侧性能
Construction technology of post-tensioned unbonded prestressed concrete structure;
浅谈后张无粘结预应力混凝土结构施工技术
Law of stress increment in unbonded tendons for concrete simple beams and slabs;
预应力混凝土简支梁板中无粘结筋应力增长规律
The method for calculating stresses in unbonded prestressing tendons is proposed as follows:calculating the deflection of two-span continuous beam subjected to external load by equal stiffness method which is accord with stiffness formulae of design criteria;calculating the elongation of unbonded tendons;calculating stresses in unbonded prestressing tendons due to elongation.
合理考虑两跨连续梁在加载过程中受力模式的变化和无粘结筋的应力增量对支座控制截面正截面抗弯承载力的贡献,选择合理的结构“失效”标志,就可应用相关设计规程所给刚度计算公式按等刚度法计算结构的变形,求得无粘结筋在外载下的伸长,从而确定无粘结筋极限应力。
How to protect unbonded tendon and anchorage is the key to prevent corrosion in unbonded prestressed concrete.
无粘结筋与锚具是无粘结预应力结构防腐蚀的关键。
In order to meet the need of big space,the unbonded prestressed concrete cross-beam floor is adopted in the multifunctional office building in Heilongjiang province.
为满足室内大空间的需要,黑龙江某多功能厅采用无粘结预应力井式梁板楼(屋)盖。
In construction of Foshan Shijilian Stadium project, engineers adopted some prestress techniques such as unbonded prestressed concrete ring floors, bonded prestressed concrete large oblique columns, bonded prestressed concrete cushion caps and prestressed uplift anchor rods and so on.
佛山世纪莲体育场工程,设计采用无粘结预应力混凝土环向楼面、有粘结预应力混凝土大斜柱、有粘结预应力混凝土大承台和预应力抗拔锚杆多项预应力技术,介绍了技术难点与采取的施工措施。
In the paper, design procedure that nonlinear full-range analysis of the unbond prestressed concrete flexural member is used by the model of cable-beam is introduced.
介绍了来用索—粱法对无粘结预应力混凝土受弯构件进行非线性分析的程序设计方法。
Large cohesionless soil permeability experiment system and application;
大型无粘性土渗透破坏试验系统及应用
A theoretical formula determining the coefficient of earth pressure at rest for cohesionless soil;
确定无粘性土静止土压力系数的一个理论公式
The stress vector_based constitutive model for cohesionless soil, proposed by SHI Hong_yan et al, was applied to analyze the deformation behaviors of materials subjected to various stress paths.
将史宏彦等提出的无粘性土的应力矢量本构模型应用于分析多种复杂应力路径下材料的变形问题· 结果表明 ,此模型不仅能够很好地反映无粘性土的应力应变非线形、硬化性、剪缩剪胀性、与应力路径的相关性、主应力与主应变增量方向之间的非共轴性以及球偏应力与变形的耦合性等主要变形特性 ,而且也能够同时考虑主应力轴的旋转和中主应力对土的变形及强度的影响· 模型预测结果与试验结果之间的良好吻合表明了该模型的广泛适用性
Application of unbounded Prestressed Flat on Agricultural Building;
无粘结预应力平板结构在农业厅大楼的应用
The key of calculating flexure strength of UPPC beam is to determine unbounded prestressed tendon s ultimate value when the components are under their ultimate load ability.
计算UPPC梁(板)的抗弯强度,关键是确定构件在极限承裁能力时无粘结预应力筋的极限应力值。
In this paper,the formula of flexural stiffness of unbounded prestressed concrete beams are developed by the method of material mechanics.
采用材料力学方法推导了无粘结预应力混凝土受弯构件的抗弯刚度公式 ,指出无粘结筋对构件抗弯刚度的贡献小于有粘结筋对构件抗弯刚度的贡献 ,对布筋形式、荷载形式等因素进行了简要分