桥的

The simulation floating zone modelwith zero temperature gradient in the middle of the hot rod is proposed to simulate thehalf part of the full floating zone convection,since the temperature gradient in the middleof a full floating zone approaches zero.

根据加热方式的不同，可以将半浮区液桥分为通常半浮区液桥模型、模拟半浮区模型以及改型半浮区模型。通常半浮区液桥模型，液桥热端材料一般选择为金属材料，使得热端温度分布均匀。液桥产生热毛细对流时，在液桥热端内侧存在较大的轴向温度梯度。而在全浮区热毛细对流中，浮区中间的轴向温度梯度在对称条件下应该接近于零。

There might be significant infilling of atural gaas in Quaternary in this area.

桥口地区黄河Ⅱ号断层、桥东断层、李屯断层是桥口构造运移的主要通道，这些断层的分期封闭和活动形成了桥口构造与岩性圈闭油气藏。

Downstream, the next bridge is Westminster Bridge; upstream the next is Vauxhall Bridge.

在其下游相邻的桥是威斯敏斯特桥，上游相邻的桥是活克斯豪桥。

First across a wood bridge, being the middle span of it, hear the sound of "Caca", and the bridge is broken with our car down. We are shocked after the var passes over, the bridge reform to the original style!

先是经过一座木桥，到了桥中央，只听桥咯砟一声响，桥断了，我们的车也向下一沉，咯噔一声，吓人一跳，车过以后，桥又恢复原状！

The main reason for this growth is that MSE abutments generally cost substantially less than conventional concrete abutments, especially at sites underlain by weak or compressible soils where piles are eliminated by true MSE abutments.

SME在桥肩加固中应用增加的主要原因是和常规混凝土桥肩相比SME桥肩更经济，尤其场区地基土比较软弱或是高压缩性土，难以在实体桥肩选择桩基础。

Based on rail/wheel reaction and track/bride reaction theory and systems engineering theory, new vehicle-track and vehicle-track-bridge system dynamic models are established and discussed in details, including ballast track model and ballastless track model. The characteristics of the models are:(1) vehicle-track and vehicle-track-bridge system dynamic models are coupled in vertical and lateral;(2) track vibration on bridge is taken in account, track on bridge is considered as one or two layer continuous-point supported rail model, according to actual track structure, interaction between vehicle and bridge transfer from track structure;(3) three type of ballastless track models (tieembanked, elastic-tie-block, slab track) are presented;(4) models reflect the main feature of actual vehicle, track and bridge structure, the response computation frequency of models is relatively broad, which can be applied to analyze both low frequency and high frequency vibration.

基于轮轨相互作用和线桥相互作用特点，本文从系统工程角度出发建立了车辆、有碴轨道和无碴轨道、简支箱梁桥垂向和横向耦合系统动力分析模型，该系统模型具有以下特点：（1）车线、车线桥体系均考虑为垂向、横向耦合振动系统，车线间通过轮轨接触几何关系耦合，轨道与桥梁间通过轨道与梁体间的力与位移协调条件耦合；（2）充分考虑桥上线路在车线桥系统中参振作用，根据桥上线路轨道结构特点将桥上轨道结构模型具体化，即对桥上轨道结构视为多层支承体系，车桥间的动力作用通过轨道结构来传递；（3）建立了三种形式无碴轨道动力分析模型，即长轨枕埋入式、弹性支承块式和轨道板式无碴轨道模型；（4）系统模型详细，分析频带宽，适用范围较广。

The results show that space finite analysis results are close to test ones, bottom chords suffer axial force and large in-plane bending, and the max stress is nearby each middle internode. The max stress of node crossbeams occurs in No.2 bottom flange, and that of internode crossbeams happens in ones lying in the middle of every internode. The concrete slab is in tension at the longitudinal direction, and also suffers bent at vertical loads. The degree of completely-composite model taking part in the combined actions is about 55%, while that of semi-composite model is 42%-43%. The combination of concrete slab and bottom chord increases the degree of floor system taking part in the combined actions, lightens the burden of bottom chord, and reduces out-of-plane bending of node crossbeams especially the ones near bridgehead. Stress and displacement of main truss can be evaluated by a equivalent plane rigid frame in preliminary design, and effective stiffness of bottom chords are composed of original ones and concrete slab, and the concentrated load from deck can be translated into uniform load.

研究结果表明：空间有限元分析结果与试验结果较吻合；下弦杆受到轴向拉力和较大的面内弯矩作用，各节间最大应力出现在节间中点附近；节点横梁最大应力发生在横梁2的下翼缘，节间横梁最大应力发生在位于端节间中部的小横梁上；混凝土板顺桥向整体受拉，并在竖向集中荷载作用下产生弯曲变形；全结合模型大部分节间内的桥面板参与主桁共同作用的程度为55%左右，半结合模型桥面板的参与程度为42%~43%；桥面板与下弦杆结合能够增加桥面板的参与程度，减轻下弦杆荷载，减少节点横梁尤其是靠近桥头横梁的面外弯曲；对桥梁进行初步设计时，主桁杆件的位移与内力可按照1个等效的平面刚架计算，下弦杆的等效刚度由原下弦杆截面和混凝土桥面板截面组合而成，桥面荷载可转化为均布荷载施加。

Company produces instrumentation pipe fittings, valves, Health Line bridge, steel bridge, fire tray, glass tray steel, aluminum alloy bridge, busbar, high-low-voltage distribution equipment and lighting boxes, power boxes, instrument incubator of the enterprise, access to the National Technical Exposition Busway gold, bridge, low-voltage switchgear was Zhenjiang City Technical Supervision promulgated the hair quality certificate, the company's products have been used for supporting the use of national key project.

公司生产仪表管件、阀门、汇线桥架、钢制桥架、防火桥架、玻璃钢桥架、铝合金桥架、母线槽、高低压配电设备及照明箱、动力箱、仪表保温箱的企业，母线槽获得全国技术博览会金奖，桥架、低压开关柜获得镇江市技术监督局颁布发的优质产品证书，本公司产品先后被用于国家重点工程配套使用。

The invention includes a bridge, a bridge traveling mechanism, a crane trolley, a telescopic boom and a telescopic traveling mechanism; wherein the bridge traveling mechanism drives the bridge to travel longitudinally along the track on elevated beams on the two sides; the crane trolley travels laterally along the track on the bridge; the telescopic boom is arranged between the crane trolley and the bridge, the crane trolley travels laterally along the track on the telescopic boom; and the telescopic traveling mechanism drives the telescopic boom to travel laterally along the track on the bridge.

本发明包括桥架、桥架运行机构、起重小车、伸缩臂和伸缩运行机构；其中，所述桥架运行机构驱动所述桥架沿两侧的高架横梁上的轨道纵向运行；所述起重小车沿所述桥架上的轨道横向运行；所述伸缩臂设置在所述起重小车和所述桥架之间，所述起重小车沿所述伸缩臂上的轨道横向运行；所述伸缩运行机构驱动所述伸缩臂沿所述桥架上的轨道横向运行。

In the recent years, our company speeds up the civilizing process of emergency bridge, forming five series of civilian emergency bridges including pontoon, suspension bridge, cableway bridge, combined working ship, package type railway steel bridge and has achieved comprehensive achievements by fully utilizing the emergency bridges characteristics of "high mechanization, rapid erecting speed, flexible length and width per requirements, superior interchange performance strong applicability".

近年来，我们充分利用应急桥&机械化程度高，架桥速度快，能长能短，能宽能窄，互换性好，适用性强&的特点，加快了应急桥民用化进程，形成了浮桥、吊桥、索道桥、组合式工程船、装配式公路钢桥五大民用应急桥系列，并创造了不俗的业绩。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐