铁道科学与工程学报2016，Vol.13Issue(4)：595-599,5.
时速250 km/h铁路双线箱梁的畸变效应研究
Distortion effect of double track railway box girders with speed of 250 km/h
摘要
Abstract
In order to calculate the distortion effect of double track railway box girders at the speed of 250 km/h, a numerical model is established based on shell finite element method.Using finite element method and the tradi-tional analytical method,distortion stress is calculated and analyzed under only single track live load.By defi-ning the parameters of warping ratio,the rules of warping stress influenced by the design parameters of high span ratio,width span ratio and wall thickness are analyzed.Comparing with the traditional analytical solution,the fi-nite element method is more suitable for the analysis in the box girder distortion effect.Under eccentric live load of single track,the value of warping ratio on flange edge of top plate is 11.6%,while it is 13.9%near the in-tersection of the web and the bottom plate which is the maximum in mid-span section.Analyzing the warping ratio on sections of mid-span and 1/4,it is shown that the beam design parameters of existing box is reasona-ble.The maximum warping ratio on mid-span section is less than 15%,while nearly 0 on 1/4 section.The de-sign parameters of high span ratio,width span ratio and wall thickness can influence the sectional distortion of box girder.It is found that the distortion effect decreases with the increase of the high span ratio,width span rati-o and wall thickness.关键词
铁路箱梁/畸变/翘曲应力/数值分析Key words
railway box girder/distortion/warping stress/numerical analysis分类
交通工程引用本文复制引用
蔺鹏臻,孙理想,冀伟,杨子江..时速250 km/h铁路双线箱梁的畸变效应研究[J].铁道科学与工程学报,2016,13(4):595-599,5.基金项目
国家自然科学基金资助项目(51368031) （51368031）
甘肃省基础研究创新群体项目资助(1506RJIA029) （1506RJIA029）
