External prestressing is one of the most effective methods to strengthen bridge.
体外预应力技术是加固既有钢筋混凝土桥梁结构最有效的方法之一。
In our country, the technique of prestressing concrete has been applied in engineering projects for 40 years.
预应力混凝土技术在我国工程建设中的推广应用，已有四十年的历史。
The composite box girder with corrugated steel webs is a new structure applying external prestressing technique to bridge construction.
波形钢腹板组合箱梁是将体外预应力技术应用于桥梁领域的一种新的结构形式。
As a branch of the post-tensioned prestressing system, external prestressing technique has become a hotspot of prestressing techniques in recent years.
体外预应力技术作为后张预应力体系的重要分支之一，近年来成为预应力技术的热点。
External prestressing means that the prestressing bars are disposed outside the beam bodies, which in tradition are inside the beams with or without bond.
体外预应力是指预应力筋布置在混凝土梁体以外的预应力，与之相对的即为传统的预应力筋布置在构件截面内的有粘结或无粘结预应力。
The dimensions or prestressing force and eccentricity require modification .
尺寸或预加力和偏心需要修改。
The vertical tendon had to be prestressed twice to ensure effective prestressing.
竖向预应力应两次张拉以保证有效预应力。
Second, the space prestressing effect analytical theory and method was formulated.
其次论述了空间预应力分析理论及方法；
P The prestressing tendons shall have adequate ductility, as specified in en 10138.
预应力筋必须有EN 10138中规定的足够塑性。
Some problems of exerting prestressing force on the transducer are presented as well.
文中还对传感器加预紧力的几个问题作了介绍。
As prestressing tendons, the stress relaxation property of FRP tendons must be studied.
将FRP筋作为预应力筋使用，必须了解其应力松弛特性。
Suitable calibrated dynamometers were used to control the pull in the prestressing cables.
用合适的率定过的量测计控制预应力钢索的拉力。
The stress distribution of cable-pylon anchorage zones under U-prestressing tendon is analyzed.
分析了U形钢束作用下索塔锚固区应力大小及分布情况。
The vertical tendon can effectively set up vertical prestressing force in the concrete web and stirrups.
竖向预应力筋能在腹板混凝土和箍筋中有效地建立起竖向预应力。
The crack load increases with the increase of the amount of the prestressing steel or the tensioning stress.
预应力筋用量的增加、张拉控制应力的增大使预应力框架梁、柱的开裂荷载提高。
External prestressing is more and more used in bridge and building structures as well as structure strengthens.
体外预应力多应用于桥梁和建筑结构以及结构加固补强之中。
This serves as part of a research program for evaluation of the fatigue of external prestressing tendon systems.
这项研究是体外预应力钢束体系疲劳评价研究的一部分。
There is much prestressing loss for friction resistance among wedge, steel strand and anchor-ring in engineering.
预应力张拉施工中夹片、钢绞线和锚环之间存在着很大的摩擦阻力。
Studies on prestressing strengthening are focused on prestressing level, end anchorage and prestressing losing etc.
预应力加固的研究主要集中于预应力控制值、端部锚固和预应力损失方面。
Provisions for concrete, reinforcement and prestressing steel are given in Section 3 or the relevant Product Standard.
混凝土，钢筋和预应力钢筋的规定见第3部分或有关产品标准。
This optimized design method for prestressing is applicable to design of prestressing in that complex structural system.
这种预应力优化设计方法非常适用于该类复杂结构的预应力设计。
The large-span prestressing truss-string applied to Guangzhou International Conference Exhibition Center is a new-type structure.
广州会展中心屋顶采用的大跨度预应力张弦桁架是一种新型结构。
Adequate ductility in bending may be assumed if the prestressing tendons satisfy the requirements for bendability of en ISO 15630.
如果预应力筋满足enISO 15630中对弯曲性的要求，则可以假设其有足够的弯曲塑性。
The results show that the formula can accurately give the distribution of effective prestressing force of a loop prestressed cable.
计算结果显示该计算公式能够准确地算出环形预应力束的有效预应力分布。
P Anchorages and couplers for the prestressing system considered shall be in accordance with the relevant European Technical Approval.
预应力系统所用的锚固和连接器必须符合相关的欧洲技术认可。
Calculation of the prestressing loss caused by batched tension process is very complicated in calculation using spatial structural theory.
预应力混凝土多主梁结构的预应力钢筋分批张拉损失计算，按照空间结构理论计算将非常繁琐。
Based on the practice, it presents the principles and calculations of the external prestressing applied to strengthen the existing bridge.
结合实践，介绍了体外预应力加固旧桥的原理及配筋计算方法。
For prestressing tendons, the minimum cover of the anchorage should be provided in accordance with the appropriate European Technical Approval.
对于预应力筋，提供的锚固的保护层最小厚度必须与相关欧洲技术认可中的规定一致。
Research purposes: This paper analyzes the effect of the lateral prestressing tendon in top deck on the lateral calculation result of box beam.
研究目的：研究顶板横向预应力钢束对箱梁横向计算结果的影响，给箱梁结构设计提供借鉴和帮助。
Research purposes: This paper analyzes the effect of the lateral prestressing tendon in top deck on the lateral calculation result of box beam.
研究目的：研究顶板横向预应力钢束对箱梁横向计算结果的影响，给箱梁结构设计提供借鉴和帮助。
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