查询词典 unbonded

Then the fundamental equations for plate/shell bi-nonlinear finite element model were set up with layered finite method. the fundamental geometric nonlinearity equations for the unbonded prestressed tendon and double spring element were proposed, and the double spring element was used to simulate the interaction of unbonded prestressed tendon and deviator.

最后，针对配置体外CFRP预应力筋混凝土梁的受力特性，对各规范和规程中的裂缝计算公式进行了相应的修正，建立了适用于配置体外CFRP预应力筋混凝土箱梁和T梁短期和长期裂缝宽度的计算公式。

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

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。

The improved element with unbonded prestressed tendons can be used for the analysis of unbonded prestressed cocrete structures.

这个模型可用于无粘接的预应力混凝土结构的分析。

The development of the unbonded prestressed concrete structure is reviewed at first, and then the viewpoints are put forward about some problems of the application of the unbonded prestressed technology in the bridge.

本文首先回顾了无粘结预应力混凝土结构的发展情况，并对无粘结预应力技术在桥梁工程中的应用前景与存在的一些问题提出了自己的看法。

The use of unbonded tendons is now common in prestressed concrete structures, and they may be in the form of internal or external tendons.With the increasing use of unbonded tendons in both new construction and retrofitting of existing structures, there is the need for a closer look at their design and analysis.

采用无粘结预应力是现在常见的预应力钢筋混凝土结构，并且它们可能采取的形式是内部或外部tendons.with越来越多地使用无粘结预应力在这两个新的建设和改造现有的结构，有必要建立更密切看看他们的设计与分析。

Ultimate capacity of cross-section is partly determined by stress value of unbonded tendon. The stress value is determined by state of net concrete beam that relative to unbonded tendon under prestress, ultimate load and restriction.

承载力极限状态的无粘结筋的应力值部分决定了构件截面的承载能力，而这个应力值的大小取决于相对于无粘结筋束的净混凝土梁在预加力、极限荷载及约束条件下的状态。

The method of calculating the bearing capacity of Normal Section in external unbonded prestressed beams is also suggested, which can be used to calculate the strength of concrete beams with straight unbonded tendons prestressing tendons and draped prestressing tendons with one or two support deviators.

计算结果表明，公式计算值与实测值接近，所建立的公式对直线预应力筋、具有一个转向块、两个转向块的折线形预应力等布筋方式的梁的承载力计算结果是能满足工程需要的。

The flexural capacity, deformation and failure modes of beams with different parameters can be analyzed using the program, such as types of plan and prestressed tendons(extrenal prestessed tendons, internal unbonded prestressed tendons, internal bonded prestressed tendons), jacking and effective stress in external prestressed tendons, configuration of the deviators, properties of tendon, ratio of span to effective depth of the beam and load pattern, initial loading state at tendon jacking, etc.(3) Nonlinear behaviors of the concrete beam prestressed with external or internal unbonded tendons were studied by the program developed.

本程序可以对任意截面型式的预应力(体外预应力筋、体内无粘结预应力筋、体内有粘结预应力筋)混凝土梁和普通钢筋混凝土梁进行非线性全过程数值分析计算，程序可以就转向块的布置方式、体外预应力筋纵断面形状、体外筋有效预应力的大小及材性、张拉预应力筋时梁的持荷状态等因素对体外预应力混凝土梁在外荷载作用下的强度、变形特征、破坏模式等的影响进行分析研究。

The finite element model included two types of main element: beam element for concrete and truss element for internal unbonded or external tendon. The end nodes of main elements were connected with internal constraints named MPC in ABAQUS. Spring elements with very large stiffness were set up at the place of the deviators of externally prestressed beams, or along the span with relatively little space of unbonded internally prestressed beams. The modified Riks method is utilized to trace the entire structural response of beams prestressed with unbonded tendon from zero to ultimate loads. The reliability of the analysis model is verified by analytical results of typical test beams in comparison with experimental ones.

该有限元模型由两类主单元组成，即混凝土梁单元和体内无粘结或体外预应力筋桁架单元；主单元的端部节点用ABAQUS的内在约束MPC连接；在体外预应力梁的转向块处，或沿体内无粘结预应力梁全跨并以比较小的间隔设置刚度足够大的弹簧单元。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。