V墩异型钢混梁拱组合桥运营阶段力学性能分析  

Analysis of Load Bearing Performance of an Irregular Combined Steel Concrete Beam and Arch Bridge with V-Shaped Piers

作　　者：李杰[1] 贺峥 彭文龙 

机构地区：[1]郑州大学土木工程学院,河南郑州450001

出　　处：《世界桥梁》2017年第6期60-64,共5页World Bridges

基　　金：河南省基础与前沿技术研究项目(162300410264)

摘　　要：为了确定V墩异型钢混梁拱组合桥在运营荷载作用下变形及受力的特点,以郑东新区前程路大桥为背景,采用组合有限元建立大桥精细有限元模型,考虑运营阶段的汽车活载、人群荷载、温度荷载(整体升降温、日照正负温差),分析荷载单独作用于异型拱桥主要构件的力学性能。结果表明:由于预应力混凝土V墩与边跨预应力混凝土主梁形成刚度较大的刚架,活载对该V墩刚构组合拱桥力学性能影响很小,但温度荷载对桥梁结构的影响较大,整体升、降温作用对预应力混凝土结构受力及变形的作用十分显著,整体升、降温作用对钢结构的受力影响不大,但变形影响显著,梯度升、降温作用对桥梁结构受力及变形的影响介于活载作用和整体升、降温作用之间。To examine the deformation and load bearing properties of the irregular combined steel-concrete beam and arch bridge with v-shaped piers under the operation loads, the Qiancheng Road Bridge in the Zhengdong New Area was taken as the study background. The mixed finite ele-ments were used to establish the refined finite element model of the bridge. The load bearing per-formances of the main components of the irregular arch bridge under the vehicle load, pedestrian load, temperature load （integral rising and falling of temperature, sunshine temperature differ-ence） respectively were analyzed in detail. The results show that the living loads have slight influ-ence on the rigid-frame composite arch bridge with V-shaped piers because of the rigid frame with high stiffness formed by the prestressed concrete V-shaped piers and the side-span prestressed con-crete main girder. But the temperature loads have great influence on the bridge structure. The global rising and falling of temperature has distinctive effect on the load bearing behavior and de-formation of the prestressed concrete structure, but minimal influence on the steel structures and great influence on the deformation. The gradient temperature rising and falling on the load bearing performance and deformation of the bridge structure is between those of the living load effect and global rising and falling of temperature.

关 键 词：钢混梁拱组合桥 V墩 异型拱 温度荷载 运营阶段 力学性能 有限元分析 

分 类 号：U441[建筑科学—桥梁与隧道工程]