铁路钢桥压杆稳定研究的新进展

随着现代铁路桥梁向大跨、高强方向的不断发展,稳定问题已经与强度问题有着同等重要的意义.越来越多的新材料、新工艺、新构造引入铁路钢桥压杆设计中,<铁路桥涵钢结构设计规范>钢桥压杆设计的有关条文有时并不能满足设计需要.目前工程实践大多采用规范、理论计算与试验研究三者相结合的方法进行铁路钢桥压杆设计及验证.在介绍九江长江大桥、芜湖长江大桥、武汉天兴洲公铁两用长江大桥和南京大胜关长江大桥的相关研究结果的基础上,对铁路钢桥压杆稳定的研究进行了综述,并对其发展方向进行了展望.

Recent Progress in Research of Compressive Member Stability of Railway Steel Bridges

With the constant development of modern railway bridges towards long span and high strength, the issue of stability of the bridges share equal importance with that of strength of the bridges. More and more new materials, new workmanships and new structures have been introduced into the design of the compressive members of railway steel bridges while the relevant provisions on the design of the compressive members in the Code for Design of Steel Structures of Railway Bridges and Culverts cannot always cater for the need of the design. In the current engineering practice, the integrated method of the codes or specifications, theoretic calculation and test study has been mostly used for the design and verifying of the compressive members. On the basis of the introduction of the relevant research findings of Jiujiang Changjiang River Bridge, Wuhu Changjiang River Bridge, Wuhan Tianxingzhou Changjiang River Rail-cum-Road Bridge and Dashengguan Changjiang River Bridge in Nanjing, the research of the compressive member stability of the railway steel bridges is described in a summarized account and the development trends of the research are prospected as well.