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。
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。
To some extent, the conclusions in this paper have a reference value on the box girder bridge design and construction.
本文所得出的结论在一定程度上对箱梁桥的设计和施工有参考意义。
The temperature field in box girder bridge will change constantly because of the effects of sunshine and atmospheric temperature difference.
主桥箱梁内部温度场由于受到气温、日照等因素变化的影响而不断发生变化。
On the basis of the mechanical behavior of box girders, the stress design method is brought forward against the PC box girder bridge cracking.
根据箱梁结构的受力特点，提出采用应力设计方法解决预应力混凝土箱梁的受力开裂问题。
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。
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。
The essay deduces the formula of the high finite strip method analysis of the thin-walled curved box girder bridge and its program, then proves their correctness;
推导弯曲薄壁箱梁桥高阶有限条法分析的公式及程序，并验证其正确性。
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。
It was examined that the dynamic peculiarity, the welding line flaw, the size of steel member section and the rusty phenomenon of an existing municipal steel-box girder bridge.
对某在用市政钢箱梁桥的动力特性、焊缝缺陷、应力和变形、钢构件截面尺寸和锈蚀情况进行了检测，按规范要求验算了结构的整体稳定和局部稳定。
In connection with a proposed multiple curved continuous box girder bridge with cantilever hinged joints in Shanghai, two practical and efficient methods of analysis have been developed.
本文对上海一座具有悬臂铰节点的多联曲线连续箱形梁桥的可行性方案提出了两种比较实用的分析方法。
Curved box girder bridge is a complicated spatial structural system. The effect of prestressing may improve the bearing capacity of the members, but may also adversely affect the structure.
曲线箱形梁桥是空间复杂受力的结构体系，预应力效应一方面能提高构件的承载能力，另一方面也可能对结构带来一些不利的影响。
Using a spatial composite finite element method, combining three-dimensional solid element and bar element, the mechanical analysis of a two-span curved PC continuous box girder bridge is conducted.
采用三维实体单元和杆单元相结合的空间组合有限元方法，对一座两跨曲线预应力混凝土箱形连续梁桥进行空间受力分析。
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。
It is the wide application of P. C. continuous curved box-girder bridge which has become an important bridge style in the transportation infrastructure.
预应力混凝土连续曲线箱梁桥应用日益广泛，已经成为现代交通基础设施的重要桥型。
Four types of support systems have been summed up in light of continuous curved box-girder bridge supports used, the characteristics of each support system have been analyzed.
针对目前连续弯箱梁桥常采用的支承形式，提炼出四种支承体系，分析各支承体系的特点。
Otherwise, in using the continuous girder bridge we can find that the craze of the box-beam is very popular.
另外，在预应力连续桥梁的使用过程中，发现箱梁开裂的现象相当严重。
Thin-walled box girder is often used in bridge engineering.
箱形薄壁梁是桥梁工程中经常采用的结构。
Erect support on box girder perform segmented concreting of bridge tower.
在箱梁上搭设支架，分段浇筑桥塔混凝土。
The multi-scale damage analysis method for steel box girder is presented with respect to Runyang Cable-stayed Bridge.
以润扬大桥斜拉桥为分析对象，提出了扁平钢箱梁结构的多尺度损伤分析方法。
Complete the design of a prestressed box-girder bridge for the design and calculation, the true and reliable design.
本设计完整的进行了预应力连续箱梁桥的设计及计算，设计结果真实可靠。
The service time and the best time for maintenance of bridge steel box girder coating were put forward in this paper.
阐述了大桥钢箱梁涂层的使用寿命以及维修保养的最佳时期。
The adoption of the thin-walled box girder to the Y-shape bridge makes the restrained torsion effect, distortion effect and shear lag effect prominent.
人字形桥梁由于采用了薄壁箱梁结构，其约束扭转、畸变效应及剪力滞比较突出。
According to the above reasons, two kinds of methods are adopted to optimize the box-main-girder bridge.
基于以上原因，本文采用了两种方法对箱形梁桥架进行优化设计。
Underwater placement of bridge's platform and cradle construction method for multi-span continuous box-girder structure constitute the construction feature of Fuyang bridge in Zhejiang province.
以水下浇筑大桥承台和采用挂篮法施工多跨连续箱梁结构是浙江富阳大桥工程的重头戏。
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。
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。
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