铁路箱梁战时损伤数值模拟分析

以时速350km客运专线铁路无碴轨道后张法预应力混凝土简支箱梁为研究对象,基于ANSYS有限元分析软件平台,采用APDL语言编程来实现预应力混凝土箱形结构及其破损部位的数值模拟,通过与铁路桥梁规范的限值比较,对箱梁的顶板中间破坏、顶板翼缘破坏、顶板和底板同时破坏、腹板中间破坏、腹板和底板同时破坏等五种破坏形式分别予以安全评定。这对战时紧迫条件下采用何种技术处理措施,提高战时交通保障能力有着重要的理论意义和实用价值。

Numerical Simulation and Analysis of Wartime Damage to Railway Box Girders

With the post-tensioned,pre-stressed concrete simply supported box girder used for the 350 km/h high-speed passengers-oriented railway with ballastless tracks as an object of our study, the ANSYS finite element analysis software as our software platform, and the APDL language used to program and numerically simulate the structure of the pre-stressed box girder and its damaged parts, the numerical simulation of the pre-stressed concrete box-shaped structure is achieved. Compared with the various limiting values prescribed in the Technical Specifications for Railway Bridges, respectively evaluated are the five kinds of damage, namely, damage to the middle of the roof of the box girder, the roof flange, roof and floor at the same time, the middle web, and web and floor at the same time. The research is of important theoretical significance and practical value for what kind of technical treating measures should be taken to improve the war-time traffic support capability.