新型波形钢腹板曲线箱梁桥的荷载横向分布分析  

Research on Performance of Load Transverse Distribution of New Type Curved Box Girder Bridges with Corrugated Steel Webs

作　　者：齐振峰 胡世浩 QI Zhen-feng;HU Shi hao(Shanghai Urban Construetion Design&Research Institute(Group)Co,Luid,Shanghai 200125,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海市200125

出　　处：《公路》2023年第4期134-139,共6页Highway

摘　　要：为分析新型波形钢腹板曲线箱梁桥的荷载横向分布特性,以兰州市中川机场的一座新型波形钢腹板曲线箱梁桥为背景,采用有限元法对其荷载横向分布展开研究。首先,通过软件ANSYS18.2建立该曲线梁桥有限元模型,模型的正确性已得到试验数值的验证;然后,分析了3种参数对该曲线梁桥荷载横向分布的影响规律。结果表明,新型波形钢腹板曲线箱梁桥的有限元模型接近实际的桥梁结构;采用类型Ⅳ的横联,该桥荷载横向分布系数最小,采用类型Ⅰ、Ⅱ和Ⅲ的横联,其荷载横向分布系数相近,多方面考虑建议采用类型Ⅳ横向联系;对于不同类型的横联,横联间距为6.4 m和8.0 m下的荷载横向分布系数相近,考虑到曲线梁桥受力复杂,建议将横联间距控制在4.8 m以内;该桥荷载横向分布系数随桥梁跨径的增大而减小,且减幅较大。研究结果可为该类桥梁荷载横向分布的研究提供理论依据。In order to analyze the load transverse distribution characteristics of new-type curved box girder bridge with corrugated steel webs,taking a bridge in Lanzhou Zhongchuan Airport as the background.The finite element method is used to study its load transverse distribution.First,the finite element model of the curved girder bridge is established using ANSYS18.2 software.The correctness of the finite element model is verified by field tests.Subsequently,the influence of three parameters on the load transverse distribution of the curved girder bridge is analyzed.The results show that the finite element model of new-type curved box girder bridge with corrugated steel webs is close to the real bridge structure.The load transverse distribution factor of the bridge is the smallest by adopting the external intermediate cross-frame system of type IV.The load transverse distribution factor of the bridge are similar by adopting the external intermediate cross-frame system of types I,II and II.Considering various aspects,it is suggested that the bridge adopt external intermediate cross-frame system of type IV.For different types of external intermediate cross-frame system,the load transverse distribution factors are similar when the spacing is 6.4 m and 8.O m.Considering the complexity of the force of the curved girder bridge,it is recommended to control the spacing below 4.8 m.The load transverse distribution factor of the bridge decreases with the increase of its span,and the decrease is relatively large.The research results can provide theoretical basis for the study of load transverse distribution of new-type curved box girder bridge with corrugated steel webs.

关 键 词：波形钢腹板 曲线箱梁桥 荷载横向分布 ANSYS软件 有限元分析 

分 类 号：U441.2[建筑科学—桥梁与隧道工程] U448.216[交通运输工程—道路与铁道工程]