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宽跨
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  width span ratio
     The parametric studies include statically determinate structure, width span ratio, the variation of shear lag coefficient on fixed end section and width depth ratio.
     通过程序来分析箱形梁剪力滞系数的影响参数,这里包括静定结构参数分析,其中探讨宽跨比、固端截面剪力滞系数的变化,宽高比的影响。
短句来源
     Taking Shanghai Medium Ring Road Project as the project background, the paper discusses the forced characteristics of arc bottom and single box, multi cell box beam with greater width span ratio under transverse prestressed action.
     以上海市中环线工程为工程背景 ,讨论了宽跨比较大的弧形底单箱多室箱梁在横向预应力作用下的受力特性。
短句来源
     As a compress-bend structure, with increasing of the span, length slender ratio and carrying load of arch increase, lateral rigidity and width span ratio of arch ring minish relatively. During construction and service stages, lateral stability becomes more important and a control factor of arch bridge design.
     拱肋作为压弯结构,随着跨径的增大,杆件的长细比及所承受的荷载也随之增大,拱圈横向刚度、宽跨比相对减小,在施工阶段及使用阶段横向稳定问题特别突出,常常成为拱桥设计的控制因素。
短句来源
     Owing to the effect of shear lag, the conventional beam theory has a larger error in the calculating of vibration frequency of simply supported box gird. The error is obvious especially in the box gird with big width span ratio.
     由于箱梁中剪力滞效应的存在,通常采用的一般梁理论计算简支箱梁的振动频率会产生较大的误差,对于宽跨比较大的简支箱梁振动计算误差尤其明显。
短句来源
  “宽跨”译为未确定词的双语例句
     The width of the bridge is 33.5m ~ 46.7m, the ratio of width and span>1. Double point support is only installed in transverse direction with complex forced situation.
     该桥宽 3 3 .5~ 46.7m,宽跨比 >1 ,横向仅设置双点支承 ,受力复杂
短句来源
     The width-span ratio is 1/30, depth-span ratio is 1/80 in the arch rib of model 1 and its failure is destabilization inside the face, while in the arch rib of model 2, the width-span ratio is 1/60, depth-span ratio is 1/40 and it shows the side-tipping failure.
     模型1拱肋宽跨比为1/30,高跨比为1/80,结构失效表现为面内失稳,模型2拱肋宽跨比为1/60,高跨比为1/40,结构表现为侧倾失稳。
短句来源
     The shear lag effect is seriously effected by width-length ratio, girder height ratio, loading arrangement and the section's location.
     (3)剪力滞效应严重地受到宽跨比、梁高比、荷载类型及截面位置的影响,而横截面悬臂长度、腹板倾斜程度等截面几何参数对剪力滞效应的影响不大;
短句来源
     Based on the research of influenced parameters on constant and varying depth solid web box girder before,the shear lag aroused by the parameters including width-span ratio,outstanding flange on base slab and the position of the tendons are further studied.
     在前人对等截面、变截面实腹箱梁剪力滞效应影响参数研究的基础上,本文进一步对腹板开孔的连续箱梁的宽跨比、底板翼缘伸出以及预应力锚固位置改变等参数对箱梁剪力滞的影响进行研究。
短句来源
     According to the model test and theoretical (calculation) results, the paper gives the discount coefficient of the effective width after considering the shear lag of the box beam, and conversion coefficient of the vertical rigidity after considering the shear deformation.
     研究结果表明,影响箱梁剪力滞系数的主要因素是箱梁的宽跨比及荷载型式。 根据模型试验与理论计算的结果,提出考虑剪力滞影响后箱梁有效宽度的折减系数和考虑剪切变形后竖向刚度的换算系数。
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短句来源
     (weak)in width.
     (弱)。
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On the basis of Ref. [1] and [2], using analogy and a suitablecoordinate system and Finite strip method which is based on the theoryof thin shells, the space vibration problems of curved arched bridges aresimplified to two-dimensional problems, then reduced further to one-di-mensional problems. The stiffness matrix and mass matrix of curved archesare proposed. The stiffness matrix and mass matrix of straight arches,the limit case of curved arches, are also derived and a computer programfor calculating the nature...

On the basis of Ref. [1] and [2], using analogy and a suitablecoordinate system and Finite strip method which is based on the theoryof thin shells, the space vibration problems of curved arched bridges aresimplified to two-dimensional problems, then reduced further to one-di-mensional problems. The stiffness matrix and mass matrix of curved archesare proposed. The stiffness matrix and mass matrix of straight arches,the limit case of curved arches, are also derived and a computer programfor calculating the nature frequencies and modes of straight arches isdeveloped. Comparisions of the results from the model using the prog-ram with data from tests and results using Energy method indicate thatthe analysis by means of Finite strip method based on the displacementfunction obtained from analogy is correct, the plane-arch assumption foranalysis of straight arches with a common width-span-ratiouis availableand the effect of axial deformation of arches to nature frequencies cannot be neglected. Note: Only two-hinged arches are discussed in this paper, hinglessarches can be studied in the same method.

本文从薄壳理论出发,用有限条法导出了两铰改进锥面弯拱的刚度矩阵和相容质量矩阵,讨论了改进锥面弯拱的极限情况——两铰直拱的刚度矩阵和相容质量矩阵,编制了计算自振频率和振型的程序。程序计算结果与模型测试结果以及能量法计算结果对比表明:有限条法运用于拱桥分析是可行的;对常用宽跨比直拱分析按平面拱假设计算是合理的;拱轴轴向变形对频率计算结果的影响一般是不可忽略的。

The behaviour of infrared rapid thermal annealing (IRTA) of GaAs MESFET active layer and n+ layer formed by Si+ implantation is studied. Using the IRTA the obtained active layer and n+ layer have a peak carrier concentration of 1-2× 10l7cm-3, 1-2×l018cm-3 and Hall mobility of 3,000-3,500cm2/V·s, l,500cm2/V·S, respectively.The single-gate GaAs MESFETs with 120mS/mm gm, 1.1dB NF and 12.5dB Ga at 4GHz were fabricated. Comparing the IRTA with the furnace annealing(FA) .we found that IRTA has the advantage of small...

The behaviour of infrared rapid thermal annealing (IRTA) of GaAs MESFET active layer and n+ layer formed by Si+ implantation is studied. Using the IRTA the obtained active layer and n+ layer have a peak carrier concentration of 1-2× 10l7cm-3, 1-2×l018cm-3 and Hall mobility of 3,000-3,500cm2/V·s, l,500cm2/V·S, respectively.The single-gate GaAs MESFETs with 120mS/mm gm, 1.1dB NF and 12.5dB Ga at 4GHz were fabricated. Comparing the IRTA with the furnace annealing(FA) .we found that IRTA has the advantage of small effect on carrier redistribution and less severe requirement for thermal stability of substrate.The differences between IRTA and FA results are also discussed in this paper.

本文研究了GaAs MESFET有源层和n~+层Si~+注入的红外快速退火行为。用该技术获得的有源层和n~+层的载流子浓度与迁移率分别为1~2×10~(17)cm~3和3000~3500cm~2/V·s以及1~2×10~(18)cm~(-3)和1500cm~2/V·s,制成的单栅FET每毫米栅宽跨导为120mS,在4GHz下,NF=1.1dBGa=12.5dB。实验证实了快速退火比常规炉子热退火具有注入杂质再分布效应弱和对衬底材料热稳定性要求低的优点。对两种退火的差别在文中也作了讨论。

The purpose of this investigation is to examine the performance of Conti- nuous curved box girder bridge subjected to various specified loading conditions. The experimental model follows the prototype of The Cyrville Road Bridge in Ottawa,Canada.After careful considerations,it was decided to adopt a 1/24 scale aluminum and microeoncrete deck model. Various loading conditions were applied to the bridge model and results of stresses and deformations at different controlled cross sections are compared with corresponding...

The purpose of this investigation is to examine the performance of Conti- nuous curved box girder bridge subjected to various specified loading conditions. The experimental model follows the prototype of The Cyrville Road Bridge in Ottawa,Canada.After careful considerations,it was decided to adopt a 1/24 scale aluminum and microeoncrete deck model. Various loading conditions were applied to the bridge model and results of stresses and deformations at different controlled cross sections are compared with corresponding theoretical values obtained using a finite strip analysis. The results indicate that experimental deflections are in close agreement with those obtained by finite strip method with the maximum discrepancy not exceeding six percent. The transverse distribution of the deflection bears distinct linear behavior for ratio of"torsional span—width"L/B=8.89.Theoretical and experimental values of stresses also show good agreement.

本文研完的主要目的在于探讨连续弯箱梁桥在特定的荷载情况下的各种受力特征和变形情况。试验桥模型是根据加拿大渥太华市的 CyrvilleRoad 桥作为原型的。由试验实测所得的应力、应变值与理论计算值校核,得到了满意的结果;修正后的理论挠度与实测挠度,其误差在6%以内;当宽跨比L/B=8.89时,其挠度的横向分布规律基本上呈线性比例关系。本文系采用“有限条法”的计算机程序进行理论分析。

 
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