摘要
为了解我国钢管混凝土劲性骨架拱桥的发展动态,明确下一步研究工作的重点,在调查大量该类型桥梁的基础上对其特点及在我国的发展研究现状、设计计算理论、施工方法和跨径的发展进行系统的总结。该桥型具有结构体系转换次数更多、施工周期更长、结构性能更好的特点。目前的研究工作主要集中在收缩徐变效应和施工阶段稳定性两方面。其设计计算方法中应力叠加法更能反映拱桥施工阶段真实的应力状态。钢骨架的安装方法主要分为转体施工法和缆索吊装斜拉扣挂法2种。该桥型增大跨径的方法主要有增强劲性骨架、减轻主拱自重和采用组合施工方法3种。需要进一步开展的工作包括细化桥梁模型试验设计、仿真程序开发及注重结构的耐久性设计。
To have a good understanding of the development situations of the concrete-filled steel tube （CFST） framed arch bridges in China and to make clear the focal points of the researches of the bridges in China in the coming days, the characteristics, current development and researches, design and calculation theories, construction methods and the possible increase of the span length of the bridges are systematically summarized based on the extensive investigation of the ex- isting bridges of the similar kind. The bridges are characteristic of the more times of the structural system transformation, longer construction periods and better structural performance. Currently, the researches in China mainly focus on the two aspects of the concrete shrinkage and creep effect and the stability of the bridges at the construction stages. In the design and calculation theories, the stress superposition method has been widely used since the method can better reflect the real stress conditions of the bridges in the construction. The installation methods for the CFST frames of the bridges mainly fall into the methods of the rotation erection and the erection of cable crane hoisting plus fastening staying. The main methods for increase of the span length of the bridges can be the methods of improving the strength of the CFST frames, reducing the self weight of the main arches and utilizing the combined installation methods. The researches claim to be further made in the coming days include the detailing of the bridge model test design, developing of the simulation program and laying of more stress on the durability design of the bridges.
出处
《桥梁建设》
EI
CSCD
北大核心
2016年第6期45-50,共6页
Bridge Construction
关键词
拱桥
钢管混凝土结构
劲性骨架
发展概况
研究现状
设计理论
施工方法
arch bridge
concrete-filled steel tube structure
CFST Frame
general situation of development
current research
design theory
construction method
