摘要
温度作用是混凝土曲线梁桥产生"典型病害"的主要原因之一。为了更真实地揭示曲线梁桥在温度作用下的反应规律,基于ABAQUS建立了某三跨混凝土连续梁桥实体单元模型,采用"间接耦合"的方法实现温度荷载的施加,对多种支座布置工况下混凝土曲线梁桥的季节温差和日照温差效应进行计算。结果表明:季节升温作用下曲线梁桥基本不会产生扭转效应;竖向升温梯度会使曲线梁桥向外扭转;而横向升温梯度,无论沿径向由内向外或由外向内引起的扭转效应非常小;合理的支座布置形式,可以改善混凝土曲线梁桥在温度作用下的支座受力状况。
Temperature effect is one of the major causes leading to typical deteriorations on concrete curved beam bridges .To reveal the response principle of the curved beam bridge under the action of temperature as accurately as possible ,the solid element model of a three-span con-crete continuous beam bridge based on ABAQUS was built ,and the temperature loads were ap-plied by way of indirect coupling .The seasonal temperature difference and the sunshine tempera-ture difference effect of the concrete curved beam bridge in the context of different bearing arrange -ments were calculated .The result of the calculation indicated that the curved beam bridge was not likely to succumb to torsional effect under the action of seasonal temperature rise . The vertical temperature rising gradient could cause the curved beam bridge to have outward torsion ,whereas the transverse temperature rising gradient could cause minimal torsional effect either it developed from the inside to the outside along the radial direction or from the outside to the inside .And a ra-tional bearing arrangement is able to improve the load bearing condition of the bearings of the con -crete curved beam bridge under the action of temperature .
出处
《世界桥梁》
北大核心
2014年第3期47-52,共6页
World Bridges
基金
江苏省交通科学研究计划项目(2010Y13)
关键词
曲线梁桥
混凝土结构
温度作用
季节温差
日照温差
扭转
支座布置形式
支反力
有限元法
curved beam bridge
concrete structure
temperature effect
seasonal temperature difference
sunshine temperature difference
torsion
bearing arrangement form
support reaction force
finite element method
作者简介
张建东（1963-），男，研究员级高工，1985年毕业于南京工业大学桥梁工程专业，工学学士，1989年毕业于日本丰侨科技大学桥梁工程专业，工学硕士，1992年毕业于日本丰侨科技大学桥梁工程专业。工学博士（E—mail：chokt5@gmail．com）。
