查询词典 span bridge

The stretching influence on the near trusses should be considered when using the stretching-twice method, and the construction is hard to be controlled. The Harbin exhibition sports center with a 128m support span, attached to a deep design calculation of the super-large span prestress truss string structure, stretching once in tension bed method is brought forward for the bottom cable of the single truss string structure. From calculation research on the friction force between the tension bed and the truss string structure, the friction influence is considered for the displacement method of the middle of span, with the action of the fixed cable stress. This method, with vertical displacement of the middle of span as its main control target for prestress stretching, is successfully applied in the prestress stretching construction of the project.

二次张拉需考虑张拉对相邻桁架的影响，施工控制难度大，本文结合哈尔滨会展体育中心支座跨度128m的超大跨度预应力张弦桁架结构的深化设计计算，提出了单榀张弦桁架下弦拉索胎架一次张拉法施工方法，通过对张拉阶段胎架与张弦桁架间摩擦力的计算研究，定量索力下跨中位移法考虑摩擦力影响，以跨中竖向位移作为预应力张拉的主要控制指标，成功地完成了该工程预应力张拉施工。

A "Living/Learning Bridge" reestablishes a strong Walnut Street axis and connects to Rittenhouse Square Center City; A "Sports/Recreation Bridge" proposes a dramatic new pedestrian-only cable-stay span and incorporates student life programs like a series of sports and recreation parks along the river adjacent to the existing stadium; A "Health Sciences/Cultural Bridge" at South Street and future "Research Bridge" accommodate health care and research endeavors that are critical for both the university's and city's growth.

宾大链接区既是宾大下半世纪的发展蓝图，又是将校区与斯库基尔河以及费城中心城区连接起来的桥梁。

In association with the improvement design practices on winding equipment for main cable of large span cable bridges liking Shantou Gulf Bridge, Xiling Yangtse River Bridge and Xiamen Haicang Bridge, some contents are systematically described on the basis of electric control system of ZLC series winding machine for main cable, including mechanism composition of the winding machine for main cable, mathematical relationship between rotation speed of winding system and travel speed of the winding machine, work principle of accurately matching control on the two speeds with PLC and frequency converter, wireless measurement and monitor of winding system tension, automatic override control on cable clamp as well as practical effect of a real bridge application.

结合对汕头海湾大桥、西陵长江大桥和厦门海沧大桥等大跨度悬索桥的主缆缠丝施工设备－主缆缠丝机的改进设计实践，以ZLC系列主缆缠丝机的电气控制系统为基础，系统介绍了主缆缠丝机的机构组成、缠丝系统旋转速度与缠丝机行走速度之间的数学关系、采用PLC及变频器对两速度进行精确匹配控制的工作原理、缠丝系统张力的无线测量、监控、索夹的自动跨越控制以及实桥的应用效果。

In general, large-span cable-stayed and suspension bridges require bridge towers with a length of more than tens or hundreds of meters. Due to the unproportionate slenderness ratio, the bridge tower becomes vulnerable to air and thus easy to be distorted or to vibrate, which will affect the stability of the entire bridge structure. Therefore, it is of great significance to carry out an in-depth research on the force feature of the bridge tower in a flow field.

大跨度的斜拉与悬索桥，往往都需要建造数十米甚至上百米的桥塔，过大的长细比，使得桥塔在流场中受到气体的作用容易发生变形或振动，从而影响了整个桥梁结构的稳定性，因此，深入细致地研究桥塔在流场中的受力特性非常有必要。

Construction Control of Extradosed Cable-stayed Bridge;2. The main bridge of the Kaifeng Yellow River 2nd bridge of Daguang freeway is 7-tower and 8-span prestressed concrete extradosed cable-stayed bridge .

以大广线开封黄河二桥主桥——7塔8跨预应力混凝土矮塔斜拉桥为研究对象，借助MIDAS/Civil有限元程序建立了该桥梁空间有限元计算模型，采用子空间迭代法计算了桥梁的动力特性。

Haihe River Bridge opened by the East and West Approach and the main bridge consists of three parts, the main bridge structure is designed to enact rotary steel beam, the net cross 68 meters, turning radius of 35 meters, beam rotation angle of 85 degrees, at the international bridge in the same belong to large-scale, long-span bridges of legislation to open one of the rotor.

海河开启桥由东西引桥和主桥三部分组成，主桥结构设计为立转式钢结构悬臂梁，净跨68米，转动半径为35米，梁端转动角度为85度，在国际同类桥梁中属于大规模、大跨径的立转式开启桥之一。

Using the models, the author has also calculated the vibration response to high speed railway vehicles of three types travelling over simply-supported beam bridges with various span lengths respectively. Based on the analysis of the computation results, the concept of resonance velocity of a bridge under a high speed running vehicle is present, and it is pointed out that comparatively great vibration of bridges on high speed railways is caused by bridge resonance resulted from the static force pulsating. In a vehiclebridge coupling vibration system, the damping constant of the axle spring is the main factor affecting the response variable of bridge velocity resonance, and the influence of track irregularity on bridge vibration on high speed railways is rather smaller.

利用所建立的计算模型，计算了三种形式的高速铁路车辆通过各种跨度简支梁桥结构时的振动响应，对所得到的计算结果进行了详细的分析，提出了高速行车下桥梁共振速度的概念并指出高速铁路桥梁产生较大振动的原因是静力脉动引起桥梁共振造成的；通过研究车—桥耦合振动系统方程的参数后指出，在车—桥耦合振动系统中，车辆—系阻尼的大小是影响桥梁速度共振时响应大小的主要因素，轨道不平顺对高速铁路桥梁振动的影响较小。

In Hongfenghu long Span Bridge construction, stiff skeleton method is adopted to implement closure of main span and side span, by taking a series of measures to assure construction quality,the safe of structure stress and the easement of main beam alignment are assured in the course of closure segment construction.

红枫湖大桥采用劲性骨架法进行边跨和主跨的合龙，并通过采取了一系列确保合龙段施工质量的措施，保证了合龙段施工过程中结构受力的安全和主梁线形的平顺。

In recent decade, with the rapid development of transportation enterprise, many long-span bridges have been constructed or constructing, for deceasing load and increasing the span, the orthotropic steel deck is generally applied for the long-span steel bridge.

近十年来随着交通事业的快速发展，已建成或正在建设的大跨径桥梁逐渐增多，为了减小桥梁自重和增大跨径，大多数钢桥的桥面板一般采用正交异性钢桥面板。

Vehicle-bridge vibration system can be divided into two subsystems at the interface of wheel and bridge, one for the bridge and the other for the vehicle. The vehicle-bridge coupling relationship, including the geometrical compatibility condition and the static equilibrium condition between vehicle and bridge, is established.

将整个车桥系统在车轮和桥梁接触处划分为车辆、桥梁两个子系统，通过车轮和桥梁接触点处位移协调条件和力的平衡条件建立了车-桥系统动力方程。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。