基于塔梁同步施工的拱形空间独塔斜拉桥受力性能分析  

Analysis on Stress Performance of Arched Space Single-tower Cable-stayed Bridge Based on Tower-Beam Synchronous Construction

作　　者：姜锡东 周桂宾 曾有艺 JIANG Xidong;ZHOU Guibin;ZENG Youyi(Zhejiang Communications Construction Group Co.,Ltd.,Hangzhou 300051,Zhejiang,China;Dahao Municipal Construction Co.,Ltd.,Shantou 515000,Guangdong,China;School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,Hunan,China)

机构地区：[1]浙江交工集团股份有限公司,浙江杭州300051 [2]达濠市政建设有限公司,广东汕头515000 [3]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《工程技术研究》2023年第3期71-73,共3页Engineering and Technological Research

摘　　要：文章以某拱形空间独塔双索面混合梁斜拉桥为背景,选取四种塔梁同步施工方案并建立了Midas Civil模型,在与原模型(即先塔后梁施工方案)对比的基础上获取了同步施工过程时主塔、主梁的受力规律。结果表明:四种塔梁同步施工方案均可行,塔柱应力、位移变化可忽略不计,钢箱梁位移、应力有一定影响,其值均可控。塔梁同步的步骤不同将影响结构线形变化规律,塔柱同步阶段越多,线形变化越陡,反之线形变化越平缓。结构应力也与同步步骤有关,塔梁同步施工阶段越少,应力越接近原模型。选择塔梁同步施工方案时,需综合考虑这些影响因素。Based on the background of an arched space single-tower double-cable plane hybrid beam cable-stayed bridge, this paper selects four tower-beam synchronous construction schemes and establishes the Midas Civil model.On the basis of the comparison with the original model(the construction scheme of tower first and beam later), the stress law of the main tower and the main beam during the synchronous construction process is obtained. The results show that the four tower-beam synchronous construction schemes are feasible, the stress and displacement changes of tower column can be neglected, the displacement and stress of steel box girder have certain influence, and their values are controllable. The different steps of tower-beam synchronization will affect the change law of structural alignment. The more the tower-column synchronization stages are, the steeper the linear changes, and vice versa.The structural stress is also related to the synchronous steps.The less the synchronous construction stage of the tower and beam is, the closer the stress is to the original model.These factors need to be considered comprehensively when selecting the tower-beam synchronous construction scheme.

关 键 词：拱形空间独塔 混合梁斜拉桥 塔梁同步施工 受力性能 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]