斜交铁路框架桥力学性能分析  

Analysis of Mechanical Performance of Railway Oblique Frame Bridge

作　　者：朱兆斌[1] 马文龙 周啸 ZHU Zhaobin;MA Wenlong;ZHOU Xiao

机构地区：[1]杭州铁路设计院有限责任公司,浙江杭州310043

出　　处：《浙江建筑》2025年第2期1-5,共5页Zhejiang Construction

摘　　要：斜交铁路框架桥应用广泛,但力学性能复杂。今以某下穿铁路框架桥为研究背景,分别采用DDQ和ANSYS建模,并对斜交框架桥的斜交角度、长度影响因素进行数值分析。研究结果表明:利用ANSYS实体模拟斜交框架桥具有一定可行性;在进行框架桥配筋设计时,应多关注应力较为集中的顶板和侧墙交接处,斜交角越大应力集中越明显;当斜交角不变时,适当调节宽跨比,能有效改善框架桥整体受力,使之满足规范要求。Oblique railway frame Bridges are widely used,but their mechanical properties are complex.In this paper,a prototype railway frame bridge is taken as the research background.DDQ and ANSYS modeling are adopted respectively,and numerical analysis is conducted on the influencing factors of the angle and length of the skew frame bridge.The results show that it is feasible to simulate skew frame bridge with ANSYS.When the reinforcement design of frame bridge is carried out,more attention should be paid to the junction of roof and side wall where the stress is concentrated.When the inclined angle is larger,the stress concentration is more obvious.When the skew Angle is unchanged,the width‑span ratio can be adjusted appropriately to effectively improve the overall stress of frame bridge to meet the requirements of the code.

关 键 词：斜交框架桥 有限元数值分析 力学性能 变化规律 

分 类 号：U441[建筑科学—桥梁与隧道工程]