摘要
以厦门市轨道交通4号线高架桥四线简支梁为研究对象,分析该梁的内力和变形情况,采用Midas Civil 2019分别建立单梁与梁格模型,对比分析二者支座反力、变形、最大弯矩、正截面应力等指标,分析结果表明,梁格模型与单梁模型计算结果较为吻合,并能较准确地反映梁体的实际受力情况。此外,还利用梁格模型完成了预应力横隔梁、桥面板的验算,其结果满足《铁路桥涵混凝土结构设计规范》(TB10092—2017)相关规定要求。该梁格模型可以同时完成纵梁、横隔梁、桥面板的验算,建议在设计类似结构时重视预应力横隔梁对宽箱梁受力情况的影响。
Based on four-line simply supported beam of Xiamen Metro Line 4 Viaduct,this paper analyses its internal force and deformation. Bearing reaction,deformation,maximum moment and normal stress from grillage model and single beam model are studied and compared by using Midas Civil 2019. The outcome shows analysis result from grillage method is consistent with that from single beam model,and the former one can accurately reflect the real load condition. In addition,pre-stressed diaphragm beam and deck slab are checked based on grillage model and the results are in accordance with the terms of Code for Design of Concrete Structures of Railway Bridge and Culvert ( TB 10092-2017). The grillage model can be used to analyse longitudinal beam, diaphragm beam and deck slab in the meantime and it is suggested that attention should be paid to the influence of pre-stressed diaphragm beam on wide box beam regarding similar structure design.
作者
常亚辉
Chang Yahui(Zhengzhou Design Institute,China Railway Engineering Design and Consulting Group Co. ,Ltd. ,Zhengzhou Henan 450001)
出处
《铁道勘察》
2019年第4期100-104,共5页
Railway Investigation and Surveying
关键词
城市轨道交通
四线简支梁
单箱六室
预应力横隔梁
Urban rail transit
Four-line simply supported Beam
Single box with six chambers
Pre-stressed diaphragm beam
