2) existing concrete bridge
既有混凝土桥梁
1.
Under the influence of loading,environment,material and service time,the existing concrete bridges structure performance can gradually deteriorate,which makes the actual reliability of the structure reduce than the reliability that is designed originally.
既有混凝土桥梁结构在荷载、环境、材料以及使用时间等因素的影响下,结构的性能会逐步劣化,结构性能的劣化使得结构的实际可靠度比原设计的可靠度降低。
3) existing concrete beam bridges
既有混凝土梁桥
4) concrete cable-stayed bridge
混凝土斜拉桥
1.
Influence of horizontal curvature of prestressing tendon in transverse beams on concrete cable-stayed bridge inclined web;
横梁预应力束的平弯对混凝土斜拉桥边箱斜腹板的影响
2.
By construction simulation analysis of main girders of concrete cable-stayed bridges with current temporary fixed constructions,the cause was obtained that cracks often take place in the temporary fixed area of main girders.
通过对目前采用塔梁临时固结构造施工的混凝土斜拉桥主梁进行施工仿真分析,对临时固结处主梁容易开裂的原因进行了分析并对临时固结构造提出了改进建议,可供工程人员参考。
3.
Introduced in this paper are the existing status and development of concrete cable-stayed bridges, with analysis of its advantages and economical spans, indicating that with its excellent performance this type of bridge will surely gain further development.
介绍了国内外混凝土斜拉桥的发展和现状,分析了混凝土斜拉桥的优点、经济跨度等。
5) existing reinforced concrete bridge
既有钢筋混凝土桥梁
1.
An attenuation model for time-dependent structural resis-tance of existing reinforced concrete bridges is introduced, and a method for determining or modifying the model parameters with available resis-tance information using regression and least squares principles is detailed.
针对既有钢筋混凝土桥梁的特点 ,讨论了结构抗力的衰减模型 ,并提出了根据已有抗力信息采用回归分析方法及最小二乘法确定或修正模型参数的方法 ;建立了以现时刻为分析时间起点的考虑抗力随时间变化的继续使用期内承载能力可靠度分析模型 ,并讨论其求解方法。
6) existing rigid frame bridge
既有刚架混凝土拱桥
补充资料：斜拉桥
| 斜拉桥 cable-stayed bridge 用锚在塔柱上的多根斜向钢缆索吊住主梁的桥。又称斜张桥。第二次世界大战后发展的桥型之一。由桥墩、桥台 、辅助墩、塔柱、缆索和主梁组成。主梁为缆索多点悬吊，跨越能力大，内力小，高度低，施工方便，可用钢结构、预应力混凝土结构建造。箱形钢梁与钢筋混凝土桥面板组成的结合梁做主梁，用钢材较少，可减轻重量，噪声小，多用于城市桥。也可做铁路桥、人行桥和管道桥。自1955年瑞典建成第一座跨径182.6米的钢斜拉桥（斯特伦松德桥）以来，发展非常迅速，跨径不断增大，技术不断进步。1993年中国上海建成的杨浦大桥跨径已达602米，居世界首位。
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参考词条