下承式桥

By the finite element simulation to Qingchuan Bridge dynamic characteristic, the thesis discusses manifold factors which influence the dynamic characteristic of half-through concrete filled steel tubular arch bridge, and gets some conclusions.

本文通过对晴川桥的动力特性进行有限元模拟，论述了影响下承式钢管混凝土拱桥动力特性的多种因素，并得出了一些结论。

With the increasing of concrete deck slab gap for dense transverse girder deck system, the vertical displacement of tied-girder increases unconspicuously, and the internal forces of tied girder and arch rib vary slowly.

针对高速铁路下承式结合梁系杆拱桥，通过有限元分析，对纵横梁桥面系和密布横梁桥面系2种结合方式、混凝土桥面板不同的分块方式等问题进行研究。

This graduation primary of project coverage is: 2×80m bottom-road bridge continual steel truss girder bridge structure analysis and load experimental design.

猫(13)：本次毕业设计的主要内容是：2×80m下承式连续钢桁梁桥结构分析与荷载试验设计。

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。

Horizontal push will arise Pier displacement of the through arch bridge of concrete-filled steel tubes under the condition of erection of arch ribs , concreting process, transverse beam pouring and installation.

下承式钢管拱系杆拱桥在拱肋安装、钢管混凝土浇筑、横梁安装和现浇横梁、桥面板湿接头时对拱脚产生的水平推力极易造成桥墩位移，通过对不同过程中的水平力计算，确定体外束张拉方案，使水平力通过体外束得以平衡。

In this paper, the through truss composite beam is first equalized to a box beam and the progression solutions to the temperature effect of the composite beam are then obtained with the variation method.

首先将下承式桁梁结合梁等效为箱形梁，再用变分法求出了下承式桁梁结合梁温度效应的级数解，并对京沪高速铁路上的一座简支下承式钢桁结合梁桥进行了计算，其结果可供下承式桁梁结合梁设计参考。

This paper is based on the former research taking the No.1 Tong-Lv Bridge as an example; the large universal finite element program Midas/Civil is adopted, a three-dimensional finite element model is established. The static performance, the comparative analysis of influence surfaces, the experimental study and the analysis of a local finite element model of the new style three-span continuous through type bow-string arch bridge is made. With these studies, this paper is aimed at revealing the performance of this kind of construction.

本文在前人研究的基础上，以通吕一号桥为背景，采用空间有限元法对结构形式新颖的三跨连续下承式系杆拱桥的静力性能、影响面比较分析、实桥荷载试验、局部节点分析等进行研究，旨在深入理解该结构形式桥梁的力学性能，为今后相同结构体系桥梁的结构分析提供可以参考的建议。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。