摘要
中国公铁两用桥发展至今已有近80年的历史,从早期跨径小、结构受力简单的梁式体系发展到目前大跨径的拱式体系以及大跨径、超大跨径的斜拉、悬索体系等。通过收集中国已建和在建的以上4种结构体系的公铁两用桥相关资料,对中国4种结构体系的公铁两用桥主桥主梁结构、基础以及其他结构部分在结构设计、施工工艺、材料性能上的发展趋势进行了分析。分析发现:4种结构体系公铁两用桥主桥主梁结构设计中的主桁形式、桥面系、联结系在结构上由繁至简、由离散拼装至整体栓焊;主桁桁式在力学特性上与各结构体系公铁两用桥主梁受力特点相辅相成,充分发挥了材料的性能和结构的受力特点,主梁施工工艺趋于系统化、高效化、经济化,其材料性能趋于优质化;基础的类型没有明显变化,但其施工方法实现了自我创新,材料性能趋于优质化;拱式体系公铁两用桥主桥主拱的结构设计趋于新型化,施工工艺趋于复杂化,在材料的选择上趋于科学和经济化;斜拉和悬索体系公铁两用桥除主梁和基础部分外,其他部分结构的设计趋于科学化,施工趋于经济化、智能化,材料性能趋于优质化。
The development of the Chinese rail-road bridge has been nearly 80 years old,from the early beam system with small span and simple structural force to the current arch system with large span,as well as the cable-stayed and suspended cable system with large span and super large span.This paper collects relevant information of the rail-road bridge of the four structural systems that have been built and under construction in China,analyzing the main beam structure and foundation of the main bridge of the four kinds of structural systems in China,and the development trend of structural design,construction technology and material performance of different structural parts.Through analysis,the following conclusions are drawn:in terms of structure,the main raft form,bridge deck and joint system of the main girder of the four structural systems are from simple to simple,from discrete assembly to integral bolt welding;in terms of mechanical properties,the main truss and the main girder bridges of each structural system complement each other,this fully exerts the performance of the material and the stress characteristics of the structure,the main beam construction process tends to be systematic,efficient,and economical,and its material properties tend to be high quality;there is no significant change in the type of foundation,but its construction method has achieved self-innovation and the material performance tends to be high quality;the main arch of the arch-type system of the rail-road bridge tends to be new in design,and tends to be complicated in the construction process,and tends to be scientific and economical in the selection of materials;in addition to the main beam and the foundation part of the cable-stayed and suspension system,the design of other parts of the structure tends to be scientific,the construction tends to be economical and intelligent,and the material performance tends to be high quality.
作者
孙建鹏
周鹏
刘银涛
肇举
李青宁
高畅
Sun Jianpeng;Zhou Peng;Liu Yintao;Zhao Ju;Li Qingning;Gao Chang(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,P.R.China)
出处
《土木与环境工程学报（中英文）》
CSCD
北大核心
2020年第2期80-94,共15页
Journal of Civil and Environmental Engineering
基金
国家自然科学基金(51408453、51508453)
陕西省自然科学基础研究计划(2016JQ5075)
高等学校博士学科点专项科研基金(20136120120022)
陕西省教育厅科研计划(17JK0463)。
关键词
公铁两用桥
结构体系
主桥
发展趋势
rail-road bridges
structural system
main bridge
development trend
