To combined bridges of prestressed continuous beam and arch, taking the Caoxilu bridge on Mingzhu line in Shanghai as a model, a research on the following four key technologies’ countermeasures was conducted.
结合上海市轨道交通明珠线漕溪路桥工程,对连续梁拱组合桥梁的刚梁刚拱纵横梁体系整体桥面受拉、拱脚的受力分析和构造措施、钢管拱灌注混凝土的全过程中整体和局部应力状态及在柔性支撑上制作预应力混凝土梁四项关键技术进行对策研究,提出了解决办法和研究结论。
Research on the long-span combined bridge type of continuous rigid frame and flexible arch;
研究结果表明 ,该新型组合桥梁结构 ,梁拱共同受力 ,结构弯矩效应主要表现为拱受压、梁受拉的受力特性 ,主梁承受弯矩及截面尺寸显著减小 ,拱的水平推力与梁的轴向拉力相互平衡 ,使拱与梁在受力方面的优点得以充分发挥 ,结构竖向刚度大 ,外形轻
Based on the summing\|up of application of composite bridges in the western China,the advantages and performance of composite bridges are introduced,which emphasizes on the features and the construction methods of the prestressed concrete composite beam,which can be prefabricated in the factory and concreted in site.
在总结国外组合桥梁发展应用状况的基础上 ,阐述了组合桥梁这种传统而又新型的桥梁结构形式的性能和优势 ,重点介绍了现浇预应力组合桥梁和预制预应力组合桥梁的特点及施工方法 ,并结合西部大开发中大规模的道路和桥梁建设的宏观趋势 ,重点阐述了组合桥梁在西部大开发中的应用前景。
The schedule of such composite bridges is subsequently given.
给出了部分国内外此类桥梁一览表,归纳了波形钢腹板混凝土组合桥梁的最新桥型发展趋势,最后指出了波形钢腹板-混凝土组合桥梁需进一步深入研究的方向。
An axial compression test was carried out on a steel-high performance concrete composite bridge tower segment in order to study the mechanical behavior of composite bridge towers.
通过对钢-高性能混凝土组合桥塔节段进行轴压承载力试验,研究了组合桥塔的受力特性。