查询词典 Bridges

The steel-concrete composite floor system is widely used in large span high-speed railway truss bridges in China. Horizontal bending of crossbeams is a key issue in design.

中国大跨度高速铁路钢桁梁桥大多采用钢－混凝土结合桥面，横梁的面外弯曲是设计中的关键问题之一。

The formulae for computing the sectional properties and mass properties of the main girders and the crossbeams were given. Then the dynamic characteristic analysis of two given rigid frame bridges were carried out using this model, the single beam model and the solid model respectively for comparison.

基于剪力柔性梁格理论提出了能够充分考虑薄壁箱梁的自由扭转刚度、约束扭转刚度和转动惯量的三梁式计算模型，推导了模型中各主梁截面特性和质量分布的计算公式，以及横梁刚度特性的计算方法。

The entire Superstructure cross-section, except for traffic barrier, shall be considered to be placed at one time for purposes of determining support requirements and designing falsework girders for their stresses and deflections, except as follows: For concrete box girder bridges, the girder stems, diaphrams, crossbeams, and connected bottom slabs, if the stem wall is placed more than 5 days prior to the top slab, may be considered to be self supporting between falsework bents at the time the top slab is placed, provided that the distance between falsework bents does not exceed 4 times the depth of the portion of the girder placed in the preceding concrete placements.

整个上部结构截面除交通障碍，应被视为在一个确定的要求和支持他们的设计应力和挠度除，脚手架时间放在梁的目的如下：对于混凝土箱形梁桥，主梁茎，diaphrams，横梁，和连接底板，如果干墙放置超过5天前向顶板，可能被认为是自我支持之间的脚手架本茨当时顶端板放置，只要脚手架茨之间的距离不超过4倍，在前面的混凝土主梁部分存款放在深度。

Constraint of the middle truss on the crossbeams approximates to absolute rigidity and the distance between the stringer and the middle low chord are small in the four-line through truss bridge with three main trusses, which produces much larger horizontal bending stresses of the crossbeams as compared with two-truss bridges.

在四线铁路三主桁下承式钢桁梁桥中，中桁对横梁的约束近于绝对刚性，纵梁离中桁下弦杆的距离较小，使横梁的面外弯曲应力较二主桁桥梁大得多。

This pedestrian navigation electronic map data includes Beijing, Shanghai, Guangzhou, Hong Kong Bus Ride of the four major cities, the underground passage, across the street bridges, crosswalks and other pedestrian facilities, and some can walk but not the opening of the road information.

这套行人导航电子地图数据包含北京、上海、广州、香港四大城市的公交换乘、地下通道、过街天桥、人行横道等行人设施及部分可步行但不可通车的道路信息。

The approach is illustrated for the evaluation of the Yichang Yangtze river highway bridge and compared with the evaluation results of 《Code for Maintenance of Highway Bridges and Culvers》.

采用该方法对宜昌长江大桥的安全性进行评价，并与《公路桥涵养护规范》的评价结果相比较。

Then, safety analysis method was constituted considered the typical damage of concrete beam bridge. 5. By amending the reduction rate of loading capacity used in Code for Maintenance of Highway Bridges and Culvers (JTG H11-2004), a new reliable index is presented in the same safety standard to reflect the relation between load and resistance. According to the basic principal of calibration method, the recommended gradation index was computed under various factors such as different load combinations, vehicle operating status and different failure modes. With these calculated numerical values, the calculated reliability indexes standard for the estimation of safety degree of in-service concrete girder bridge members was ultimately obtained.6. Based on the related standards and results on crack and displacement that cannot continue to loading at home and abroad, the evaluation grade of the concrete beam bridge is proposed by analogy.

针对材料和构件损伤对混凝土梁式桥抗力的影响，基于材料和构件层次典型损伤的修正计算公式，在结构既有以及时变抗力评估的概率模型基础上，通过误差传递公式获得抗力统计参数，对抗力进行修正，构成了考虑混凝土梁式桥典型损伤的安全性分析方法。5、依据校准法原理，将《公路桥涵养护规范》(JTG H11-2004)中不同类别承载力下降率转化为修改分项系数，分别计算了轴心受压、轴心受拉、受弯、大偏心受压、受剪构件在各种情况下的可靠指标，根据破坏类型对校准结果进行分析，提出了基于可靠度的公路混凝土梁式桥安全性评定等级。6、基于不能继续承载的裂缝和位移的相关国内外规范和研究成果分析，通过类比提出了混凝土梁式桥不能继续承载的裂缝和位移评定等级界限。

Research results of this paper can apply to small town bridges and culverts establishment of design technical standard.

本文取得的研究成果可以应用到小城镇桥涵设计技术标准的编制。

However, with the proportion of the improvement of bridges and culverts, the proportion of investment in road and could be the continue to reduce.

然而，随着桥梁和涵洞改善的比例，在公路投资的比例，可以在继续减少。

The officer says there are thousands of militiamen patrolling bridges, overpasses and culverts in the city.

有关人员说，有民兵巡逻桥梁，立交桥和涵洞数以千计的城市。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。