The long-term deflection of Long Span Prestressed Concrete Box-girder Bridge(LSPCBB) is getting more and more serious in terms of structure safety.
最后，对桥梁设计计算、桥梁混凝土施工及箱梁下挠的防治技术进行论述，并对开展控制结构长期下挠的研究提出了建议。
On the basis of fuzzy failure criterion, model of reliability of concrete box-girder bridge is set up, and the reliability of existing bridge is calculated.
基于模糊失效准则建立了混凝土箱梁桥的可靠度计算模型，并计算了一座实桥基于模糊失效准则的可靠度。
A health monitoring system for long span prestressed concrete box-girder Bridges was designed to solve bridge safety problems related to structural cracks and excessive deflection.
为了解决大跨度预应力混凝土箱梁桥出现的严重的安全问题(如结构性开裂和不正常的过度下挠等)，设计和构建了该类箱梁桥的结构健康监测系统。
Cracking is quite common in prestressed concrete continuous box girder bridge, which influences appearance of component, life span of using, and even safety of structure,.
预应力混凝土连续箱梁桥的开裂可以说是“多发病”，影响着构件的外观、使用寿命，甚至结构安全。
To prefabricate box-girder is important in concrete cable-stayed bridge construction, it affects directly the main bridge construction of assembly progress and packing accuracy.
箱梁的预制是钢筋混凝土斜拉桥施工中的重要环节，它直接影响到主桥施工的吊装进度和拼装精度。
With its excellent section characters, the prestressed concrete box beam plays a main role in the girder bridge.
预应力混凝土箱梁以其优良的截面性质在梁桥中占据了主要地位。
This paper introduces the concrete pouring of continuous box girder of main structure of the bridge and the tension construction technology.
重点介绍了该桥的主桥上连续箱梁混凝土浇筑以及张拉施工技术。
Aiming at the main damage and its causes of a large-span continuous rigid framework bridge, the strengthening measure of adding the external cable to prestressed concrete box girder was introduced.
针对某大跨度连续刚构桥出现的主要病害及其原因，介绍了采取增设预应力混凝土箱梁体外索的加固措施。
By test, we will know more about prestressed concrete semi-rigid frame continuous box girder bridge.
通过试验，使我们对于预应力混凝土半刚构-连续梁桥有了进一步的认识。
In addition, traditional concrete box girder webs inclined crack problem has been more and more prominent, direct threat to the continuous rigid frame bridge normal use.
此外，传统混凝土箱梁的腹板斜裂缝问题也己经越来越突出了，直接威胁着连续刚构桥的正常使用。
The superstructure of the main spans of Jincheng Bridge in Wuxi is a prestressed concrete continuous box girder with its longitudinal and transverse prestressing ducts grouted by vacuum method.
无锡金城大桥主跨上部结构为预应力混凝土连续箱梁，纵、横向预应力孔道压浆采用真空辅助压浆工艺。介绍该真空辅助压浆的施工工艺。
In recent years, concrete continuous box girder bridge has been widely used at home and abroad, which has Attractive appearance, safe and reliable.
近年来，混凝土连续箱梁桥在国内为得到了广泛运用，造型美观，安全可靠。
On the prestressed concrete(PC) wide Box girder and the steel and concrete joint section of the bridge, the C55 high performance concrete is used.
鄂东长江大桥为混合梁斜拉桥，PC宽箱梁及钢-混凝土结合段采用C55高性能混凝土。
This paper researches the mix ratio of C55 concrete and construction technology of Xiaoshawan Bridge box girder, especially the influence of hill sand on concrete performances.
对小沙湾黄河大桥主桥箱梁C55混凝土配合比和施工工艺进行了研究，重点分析了山砂对混凝土性能的影响。
Through finite element analysis and experimental study, this dissertation makes systematical research on vehicle-bridge coupling vibration of concrete box-girder with corrugated steel webs.
本文通过有限元分析和试验研究，对波纹钢腹板混凝土箱梁的车桥耦合进行了较为系统的研究。
However, box girder cracking and long-term midspan deflection are the defects which commonly exist in the long-span prestressed concrete box girder bridge.
但箱梁开裂与跨中下挠是目前大跨预应力混凝土箱梁桥中普遍存在的病害。
On basis of a prestressed concrete T-type rigid frame box girder bridge, the paper compares the advantages and disadvantages of different reinforcement options.
以某预应力混凝土T型刚构箱梁桥为背景，对采用不同加固方案的优缺点进行比选，最后从技术可行性和经济角度推荐采用碳纤维CFRP加固方案。
Study on the vertical prestress loss of the prestress concrete box girder bridge web;
对混凝土箱梁腹板竖向预应力进行研究。
A calculation model and method of the cross slab in the box girder is obtained by the bridge 3D-analysis of the continuous concrete box girder under dead and live load.
为准确而全面地把握横隔梁的受力特性，结合具体算例，对箱梁横隔梁的受力特性进行了分析，指出了横梁常规计算方法的缺陷，并提出了一种新的计算模型。
Prestressed construction technology of the box girder concrete of the bridge and the vacuum grouting technology;
真空压浆是后张预应力混凝土结构施工中的一项新技术，已经越来越广泛地应用于工程实践中。
The gait-model bridge girder erection machine mainly applied to the erection of long-span, large-tonnage and double amplitude bridge deck concrete full-span box girders.
本架桥机主要应用于大跨度、大吨位、双幅桥梁架设中混凝土整孔箱梁的架设。
The gait-model bridge girder erection machine mainly applied to the erection of long-span, large-tonnage and double amplitude bridge deck concrete full-span box girders.
本架桥机主要应用于大跨度、大吨位、双幅桥梁架设中混凝土整孔箱梁的架设。
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