查询词典 span bridge

The structure parameter influences on lateral stability, such as arch axis coefficient, arch high span ratio, crankle rigidity ratio of arch rib, vertical and lateral rigidity ratio of arch rib, lateral rigidity of bridge decking and arch rib ratio, crossbeam number, rigidity of crossbeam number the effect of non-orientedly conservative loadings of bridge deck and width span ratio, were discussed. Corresponding numerical charts were given, and they may be of some reference value and helpful to the parameter design of ribbed arches.

考虑了拱轴系数、矢跨比、拱肋抗扭刚度与横向抗弯刚度比、拱肋的竖向抗弯刚度与横向抗弯刚度比、横系梁在拱肋切平面内的抗弯刚度和拱肋的横向抗弯刚度比、横系梁在拱肋径向的抗弯刚度与拱肋的横向抗弯刚度比、桥面系的横向抗弯刚度与拱肋的横向抗弯刚度比、横系梁的数量、桥面系横向刚度引起的非保向力效应及拱肋间距与跨径的比对组拼拱横向稳定的影响，并给出了相应的图表，为拱桥设计时拱肋的结构参数的选取提供一定的依据。

Through the assimilating and analyzing the construction materials and the design of reinforced concrete arch bridges with long span from both domestic and abroad, the thesis studies the effect of the arch axis geometry, rise-span ratio, arch ring section and spandrel structures, as well as the ultimate bearing capacity and stability of the entire bridge on the design of reinforced concrete arch bridge. In addition, in consideration of construction, the thesis also studies the applicability of different construction methods such as cable crane system, stiffened skeleton system, swing construction system and cantilever construction system and correspoindingly economica spans and their applications of the reinforced concrete arch bridges.

本论文通过对国内外大跨径钢筋混凝土拱桥的设计、施工资料的收集及其出现问题的分析，从设计角度研究了拱轴线形、矢跨比、拱圈截面及拱上构造、全桥极限承载能力及稳定性对钢筋混凝土拱桥设计的影响；从施工角度研究了缆索吊装法、劲性骨架法、转体施工法、悬臂施工法等不同施工方法的钢筋混凝土拱桥的经济适用跨径及其适用条件。

This paper is carried out to analyze the buffeting of long-span steel arch bridge in operation and erection stage. The research is mainly focused on the following aspects: Based on the present AR method, the AIC rule is used for fix the rank of the AR model to improve the simulation precision. Take into account that the wind speed spectrum is vary with the height for the long-span steel arch bridge, simulate the fluctuating wind field.

主要工作有以下几个方面：通过对现有的AR法进行改进，采用最小AIC(A-Information Criterion)准则准确识别模型阶数，提高AR法的计算精度，并考虑大跨度钢拱桥风速谱随高度变化的特点，实现了对三维空间脉动风场的有效模拟。

The article is based on the 6m-span girder bridge in the Country Road 312, using ANSYS to analyze the model of no bearing and simple-supported plate girder bridge, which with width-span ratio of 2 and continuous deck.

以国道312线跨径6m的板梁为例，用ANSYS对宽跨比为2且桥面连续的无支座简支板梁桥进行模态分析。

In this dissertation, construction methods of long span arch bridges are reviewed firstly, and the lifting process of Shengmi Bridge's arch ribs is illuminated in detail. In succession, the status of study of wind-resistance in long span bridge construction is presented, and then the necessity of work of this dissertation is brought forward.

本文首先回顾了大跨度拱桥的施工方法，详细说明了生米大桥主拱肋吊装的施工过程，接着介绍了目前大跨度桥梁施工期间抗风研究的现状，提出了进行本文工作的必要性。

It is very easy to understand and grasp the calculation model's parameters estimation of a large span box-beam bridge with the least square method, and the theory's effect on the cantilever construction control of the bridge with a main span below 100m is obvious and well.

对主跨≤100m的大跨连续箱梁桥悬臂施工控制，采用最小二乘法进行参数估计，较容易理解和掌握，而且施工控制效果良好，具有一定借鉴意义。

The main works are as follows: 1 The developingt history of the traffic load on bridges is represented. Typical bridge codes in some countries are discussed and these traffic load models are comparative analyzed. Analysis shows that the influence of layout axle for the total traffic load effect on bridge gradually becomes smaller with the increase of bridge span. So most national norms use the distributed load as the equipollent load of traffic load.

主要内容包括下面几个方面： 1阐述了桥梁汽车荷载发展的简史，讨论了部分国家典型的桥梁汽车荷载设计规范，并对这些荷载模型进行了对比分析，分析表明随着桥跨的增大，车轴布置对桥梁整体荷载效应的影响逐渐变小，因而大部分国家的规范都把均布荷载作为车辆的等代荷载。

According to theory analysis and example computation, the following conclusions are obtained.1. During the analysis on the cable shape in the suspension bridge"s completion state, the pre-displacement of saddle and the case that the cable and stiff girder commonly bear the second-stage dead load should be considered.2. When supposing the construction ideal initial state in the first time, if the initial state model is established according the cable"s span central sag in the bridge"s completion state, and the reasonable correction formulation is created in the iteration process, the result can converges fast.3. The cable shape in the bridge"s completion state is not parabolic, nor catenary. It is between parabola and catenary. Actually it is funicular polygon closer to the catenary.

通过理论分析和实例的计算表明：1在悬索桥主缆成桥线形分析过程中，须考虑主塔鞍座的偏位以及二期恒载由主缆和加劲梁共同承担的实际情况；2在第一次假设施工理想初态时，以成桥状态已知的主缆跨中垂度建立施工理想初态模型，同时在迭代计算的过程中，建立合理的修正公式，才能使收敛的速度快：3在成桥状态时主缆的线形既不是抛物线，也不是悬链线，而是介于抛物线与悬链线之间，更接近于悬链线的索多边形。

The Sydney Harbour Bridge is famous for being the world's widest long-span bridge and its tallest steel arch bridge.

悉尼海港大桥以世界最宽与最高的钢拱大桥而闻名。

On the North River Bridge Weicheng CFST arch main bridge construction S233 Provincial Highway Bridge (Gaoyou Depalletizing three to Jiangdu Port Section) under a span of 80.6m CFST arch, rigid tie beam for 1.4m × 1.8m pre-stressed box girder, cast-in-place method using stent Construction .

浅谈北澄子河大桥钢管砼拱主桥施工大桥为S233省道的一座跨径80.6m的下承式钢管混凝土拱桥，刚性系梁为1.4m×1.8m预应力箱形梁，采用支架现浇方法施工。

You'll be in trouble it you don't watch out .

如果你不注意，你会有麻烦的。

Shaped like a biconvex lens.Of, relating to, or having the form of a hyperbola.

双曲线的属于双曲线的，与之有关的，或有双曲线形状的