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bridge designs
相关语句
  桥梁设计
     Comprehensive Fuzzy Evaluation in the Optimal Selection of Bridge Designs
     桥梁设计方案优选过程中的模糊综合评价
短句来源
     In the course of the optimal selection of the bridge designs, many influencing factors are involved.
     桥梁设计方案在优选过程中,涉及到的影响因素很多。
短句来源
     For the first time in continuous rigid frame bridges,new Chongqing Shibanpo bridge has adopted 330m span,and the use of steel-concrete connector is also a first in similar bridge designs in the world.
     重庆石板坡复线桥在连续刚构桥中首次实现330 m的跨径,钢-混凝土接头的采用,在世界同类型桥梁设计中也属首次。
短句来源
     Aerodynamic admittance functions describe the transfer behavior between wind spectra and the spectra of the buffeting forces,which directly determine the precision of the predicted buffeting responses for bridge designs.
     气动导纳是反映脉动风速谱与抖振力谱之间传递特性的一个重要函数,其精度直接影响着桥梁设计过程中对结构抖振响应估计的精度.
短句来源
     Referring to the basic methods for bridge structure designs in the specifications of several countries and combining with the actual conditions,this article analyzes the characteristics of bridges in the urban railway transportation system,puts forward the classification and combination form of the loads on the bridges,presents main formulae and calculating coefficients for bridge designs and uses a computational example to compare the limit state method with the allowable stress method.
     通过对各国桥梁设计规范中关于结构设计基本方法的研究 ,参照我国实际情况 ,分析了城市高架轨道交通桥梁的特点 ,提出了高架轨道交通桥梁荷载的分类与组合形式 ,确定了设计主要表达式和各计算系数的取值 ,并结合实际算例对极限状态法和容许应力法进行了比较 .
短句来源
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  桥梁设计方案
     Comprehensive Fuzzy Evaluation in the Optimal Selection of Bridge Designs
     桥梁设计方案优选过程中的模糊综合评价
短句来源
     In the course of the optimal selection of the bridge designs, many influencing factors are involved.
     桥梁设计方案在优选过程中,涉及到的影响因素很多。
短句来源
  “bridge designs”译为未确定词的双语例句
     The beam bridge designs the curve box studying
     曲线箱梁桥设计研究
短句来源
     Mechanical effects on abutments with different fixed bridge designs replacing lower lateral incisor
     下颌侧切牙缺失固定桥设计基牙受力情况的实验研究
短句来源
     The engineering practice illustrates that the rubber plank supports used in the road and bridge designs can also be used for the joining structural member supports of the civil architectural
     工程实践说明用于道路桥梁上的板式橡胶支座,同样适用于民用建筑长廊式连接部件的支座。
短句来源
     Objective To investigate the clinical advantages in application of adhesive bridge of metal alar plate in molars with different bridge designs and different pretreatments of metal adhesive surfaces.
     目的从金属粘结面的不同处理及粘结桥的不同设计,来探讨后牙金属翼板粘结桥的临床应用价值。
短句来源
     It is impossible and costly to carry out detailed buffet analysis in the bridge conceptual phase and many short span bridge designs because the wind load on bridge is complicated.
     桥梁风荷载很复杂 ,在桥梁初步设计阶段没有必要进行精确地抖振分析。
短句来源
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  bridge designs
The introduction of curved structural sections has allowed more creative bridge designs to be 4.
      
The details of the bridge designs were also checked with the corresponding seismic design requirement.
      
Steel bridge designs continue to evolve so that there are many different types currently in service.
      
Previous bridge designs have typically been based on lower flood frequencies than recommended.
      
Notice that the 8 and 16 bridge designs result in nearly the same response.
      
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The Yangtze Valley Hydro-electric Scheme is an abnormally tremendous engineering project in the world. The trestle bridges required for concreting the dam only are of abnormal size for instauce. The main trestle bridge has to carry five lines of standard gauge railway track and two tracks for loading about 30 huge concreting cranes of about 700 tons in dead weight each. The bridge required for the first stage of work is about 90m.in height,and later on the whole flooring system of the bridge...

The Yangtze Valley Hydro-electric Scheme is an abnormally tremendous engineering project in the world. The trestle bridges required for concreting the dam only are of abnormal size for instauce. The main trestle bridge has to carry five lines of standard gauge railway track and two tracks for loading about 30 huge concreting cranes of about 700 tons in dead weight each. The bridge required for the first stage of work is about 90m.in height,and later on the whole flooring system of the bridge has to be lifted twice, each time being lifted 35m. in height. In addition, the bridge must be constructed and lifted with in the given comparatively short period of time. In this paper, some proposals for the preliminary design of the trestle bridge are presented. In the design, the super-structure contains a series of welded steel plate girders. The main girders are 24 meters span all-welded steel Plate girders of the standard railway bridge design. Two alternative designs of the trestles are proposed for comparison,one being composed of reinforced concrete tube posts of 2.0 meter diameter,similar to those used in the sub-structure of the famous Yangtze Bridge in Wuhan, the other being of steel structure. Necessary figures of the results of the design are given including the quantity of materials, the time and procedure of erection,etc. On account of economyof steel the design of R.C. trestles is suggested to be adapted in comparison with the steel structure.

用电阻丝应变片电测应力的技术近年来得到很快的发展,对于许多应力测定问题都得到广泛的应用,但是仍有一些实际应用中的问题还没有得到完善的解决。考虑到南京长江大桥管柱应力测定的要求,我们必须解决在混凝土内装置电阻丝应变片能够抵抗潮气和为时36~48小时的80℃蒸汽养护的侵蚀,而且能够经常在深水中正常使用,期限长达三、四个月之久等等问题。为此,我们对各种不同方法曾在郑州黄河桥工地和铁道科学研究院实验室内进行了试验研究。作者所提出的某些方法在试验中证明得到成功。本文就是我们所进行的这些工作的报道。

Bridges crossing mountainous streams are frequently built with circular piers and skew to the watercourse, The length of the bridge is usually not reduced by the approaching embankmemts and the degradation of the scour bed is comparatively small. Based upon the results of our hydraulic model studies and some of the field data, the characteristics of the backwater before the bridge and the creep height of the coming water upon the pier can be shown as follows:(1) The height of backwater decreases...

Bridges crossing mountainous streams are frequently built with circular piers and skew to the watercourse, The length of the bridge is usually not reduced by the approaching embankmemts and the degradation of the scour bed is comparatively small. Based upon the results of our hydraulic model studies and some of the field data, the characteristics of the backwater before the bridge and the creep height of the coming water upon the pier can be shown as follows:(1) The height of backwater decreases as the angle of skew increases. The design method used in current practices, not taking this point into account, will give erroneous results, especially when the angle of skew is large.(2) The value of creep height is far more than that of the backwater. It is an important characteristic parameter in bridge design, the value of which varies as the second power of the angle of skew, and its maximum value happens to be in the range of approximately 45°~55°(3) The discharge through one span (all spans are equal in length), increases as its location moves from the upstream side to the downstream side. The discharge through the span nearest to the downstream side is about 15~20% larger than the average value.(4) The skew bridge, the angle of skew of which is more than 50°, is not the most disadvantageous from the point of view of hydraulics.

本文根据水工模型试验资料及收集部分野外观测资料指出,对于山区河流,采用圆形桥墩,河床冲刷较小及河槽没有路堤压缩的情况,斜交桥前的壅水和墩前冲高具有如下的特点: (1)壅水值随斜交角度的增大而减小。因而现有的计算方法当斜交角度很大时将给出非常错误的结果。 (2)墩前冲高值远大于壅水值,是桥梁设计的重要参数。它随斜交角度成二次曲线的形式变化,最大值发生在45°~55°之间。 (3)斜交桥各孔通过的流量自上游向下游沿程增加,最下游桥孔通过的流量比平均值高出约15~20%。 (4)斜交角大于50°以上的斜交桥,从水力学的观点看,并非是最不利的。

In bridge designs of the present, the classic elastic theory is used for calculation of indeterminate reinforced concrete arches, Nevertheless, it could neither reflect the pratical conditions of the structure,nor fully tap the potential of the stucture. Starting from the theory of structural plastic analysis, experimental study was carried out on the ultimate strength of the reinforced concrete two-hinged arches which took into account the redistribution of the innerforces. Herewith a method for the calculation...

In bridge designs of the present, the classic elastic theory is used for calculation of indeterminate reinforced concrete arches, Nevertheless, it could neither reflect the pratical conditions of the structure,nor fully tap the potential of the stucture. Starting from the theory of structural plastic analysis, experimental study was carried out on the ultimate strength of the reinforced concrete two-hinged arches which took into account the redistribution of the innerforces. Herewith a method for the calculation of the ultimate strenth of the reinforced concrete arches within the plane was suggested and also well confirmed by the experimental results.

目前的桥梁设计中采用古典的弹性理论计算超静定钢筋混凝土拱,既不能反映结构的实际工作状态,也没有充分发挥结构的潜力。 本文从结构的塑性分析原理出发,对钢筋混凝土两铰拱考虑内力重分布时的极限承载能力进行试验与研究,并提出一个钢筋混凝土拱在平面内极限承载能力的计算方法。通过与试验结果比较,本方法得到验证。

 
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