桥梁

With the rapid development of national economy and bridge construction technology, more and more long-span bridge...

随着国民经济和桥梁建造技术的迅猛发展，越来越多的大跨度桥梁已经矗立在我国的大地上。

With the rapid development of national economy and bridge construction technology, more and more long-span bridges are built in our country.

随着国民经济和桥梁建造技术的迅猛发展，越来越多的大跨度桥梁已经矗立在我国的大地上。

Bridge Health Monitoring System is the developing trend of long-span bridge safety ensuring system.

桥梁健康监测系统是大型桥梁安全保障体系的发展趋势。

In order to ensure the safety and durability of long-span bridges, monitoring must be conducted in construction and operation period.

为保证大跨度桥梁结构的安全性和耐久性，需要在施工及运营阶段对桥梁进行监测。

This paper introduces the method of installing support frame s to decrease the span of the bridge and the bending deflection of the mid-span.

本文重点介绍通过设置支撑架的方法，以减小桥梁跨径与跨中挠度，从而达到加固桥梁的目的。

In this paper, model of vehicle with double axes is used to study the vibrations of vehicle-bridge dynamic interaction system. The active control law based on linear optimal control theory is designed, In which the transient power flow and displacement at mid-span of bridge are accounted separately.

本文采用能更加逼近真实车辆的双轴车辆模型，应用线性最优控制理论，采用可有效控制一阶振型的双臂弯矩控制系统，分别以双轴车辆输入桥梁的瞬时功率流和桥梁的跨中位移振动响应为目标函数来设计控制律。

For railway viaducts, the single- or multiple-level rigid frames are often used, the possible failure forms of the structures of multiple statically indeterminate types are extremely complicated.

铁路高架桥梁多采用单层或多层刚架，多次超静定结构的破坏形式十分复杂，合理评价它的变形能力是桥梁抗震设计所面临的重要课题。

With rapid development of express way and city traffic and the type for city bridges, interchanges and viaducts such as continuous curved girder bridges are widely used. To get beautiful linetype, the top structure of bridge is required to apply cast-in-place technology. Therefore scaffold construction technology for beams are greatly applied.

随着桥梁结构型式的发展，以及近年来高速公路及城市交通的迅猛发展，变宽桥、弯桥等复杂的预应力混凝土结构得到了广泛的应用，因线型限制，桥梁上部结构一般采用现浇，这样有支架现浇技术得到了广泛的应用，同时应用中的技术、安全问题也日益突现出来。

In fact, multi-box girder bridge is different from T-beam multi-girder bridge. First, transverse distribution of load is influenced quite with the closed box beam; Secondly, as a simply-supported—continuous system, its 3-d structure behavior is remarkable, especially for a continuous skew bridge.

事实上，多箱式桥梁与T梁桥有很大的不同，其一是作为主要承重构件的梁为闭口箱梁，对荷载的横向分布有较大的影响，其二是采用先简支后连续的体系及桥面板的现浇湿接缝连接，其空间受力特征非常显著，对于具有斜交角度的桥梁更是如此。

Based on the crack control criterion, the deflection control criterion in ultimate state of service and the strength control in the ultimate state of load-carrying capacity and the nominal steel percentage of section of beam, the formulas for the calculation of the control moment capacity of T-beam and bridge under the limiting deflection condition、the limiting cracking condition and the ultimate strength state were given, respectively.

在提出名义配筋率概念的基础上，基于结构正常使用极限状态的变形控制、裂缝控制，承载能力极限状态下的强度控制，推算不同极限状态下被预测梁的控制弯矩，并建立了桥梁结构承载能力预测方程，从而完成桥梁结构实用动力预测全过程。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。