查询词典 prestressed concrete

The relationship between stress and strain of concrete in prestressed concrete bridge s is written as algebraic form within load duration and the equilibrium equations of internal force and compatibility conditions are introduced.

首先将预应力混凝土桥梁中考虑收缩、徐变影响的任意时刻混凝土应力、应变关系在持荷时段内写成代数形式，引入内力平衡方程及变形协调条件后，提出了计入截面上钢筋位置、配筋率、预应力钢筋松弛、混凝土弹性模量随时间变化等影响的徐变效应分析的全量形式自动递进法，并建立了计算式，适用于任何形式的收缩、徐变特性表达式；基于建立的全量形式公式，可方便地求解任意时刻混凝土、钢筋的应力与应变和梁体竖向变形。

Assuming infinite diffusion medium, based on the diffusion equation for prestressed concrete structure, and accounting for the effects of concrete chloride binding capacity, time dependence of diffusion coefficients, temperature and moisture, models of chloride diffusion in two-dimensional infinite body with both power function and constant homogeneous boundary conditions were formulated.

针对无限大的扩散介质，以综合考虑氯离子结合能力、氯离子扩散系数的时间依赖性和环境温湿度影响的实际预应力混凝土氯离子方程为基础，分别在常数和幂函数边界条件下，推导出二维氯离子扩散理论的齐次模型。

Influence of various parameters including ratio of nonprestressed reinforcement, ratio of unbonded prestressing tendon, span-depth ratio, effective prestress, cylindrically compressive strength of concrete, ultimate tensive strength of prestressing tendon, yield strength of nonprestressed reinforcement and loading pattern on the behavior of unbonded prestressed concrete beams and the ultimate stress in tendon, f_, are investigated in detail. Parameters having important influence on second-order effects of externally prest

本文设计了8个系列共76根体内无粘结预应力梁，以及2个系列共21根体外预应力梁和3根体内无粘结预应力对比梁，利用提出的有限元模型对这些梁进行非线性全过程分析，详细研究了各种参数诸如非预应力筋配筋率、无粘结预应

Thurlimann B Torsional strength of reinforced and prestressed concrete beams-CEB approach Concrete Design:US and European Pacfices , 1976,null

程远兵 钢筋混凝土构件在弯矩和扭矩共同作用下的全过程分析天津：天津大学土木工程系， 1988，null

The main contents of this thesis are the aseismatic performance and design theory of steel reinforced concrete structures and unbonded prestressed concrete structures.

本文的主要研究内容是型钢混凝土结构和无粘结预应力混凝土结构的抗震性能和设计理论。

Nanning International Convention and Exhibition Center is a building of large-scale and complex structure system. Multiplicate types of structures and new technologies are applied in the project, including prestressed concrete, reinforced concrete, spatial truss, membrane and structural transfer floor etc.

摘要］南宁国际会展中心是一个规模宏大、结构体系复杂的大型建筑，在整个结构方案中，综合使用了多种结构形式和新技术，包括：预应力混凝土结构、钢筋混凝土结构、空间网壳结构、膜结构和结构转换层等。

Prestressed concrete pipe pile which is widely used in the recent decade is a type of precast concrete pile.

预应力混凝土管桩是近十余年来应用较多的一种预制桩型。

Prestressed concrete pipe pile is a new type of precast concrete pile.

预应力混凝土管桩是近年来出现的一种新的预制桩型。

Compared with prestressed concrete with bonded tendons, it abridges preformed hole, drifting steel, grouting craft etc, the method of laying steels is more agile; Compared with reinforced concrete, it strengthens the applicability of the building function, economizes a great deal of steel material and improves the structure to be subjected to the dint function clearly Therefore, be close to more than ten in the last yearses to construct the application in the structure to get the fast fierce development in our country.

与有粘结预应力混凝土相比，省略了预留孔道、穿筋、灌浆等工艺，布筋方式更加灵活；与普通钢筋混凝土相比，增强了建筑功能的适用性、节约大量钢材、明显地改善结构受力性能。因此，近十几年来在我国建筑结构中的应用得到迅猛发展。

So, to calculate the prestressed loss correctly is the important subject in prestressed concrete domain.

因此，正确计算预应力损失就成为预应力混凝土领域重要的研究课题之一。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐