小半径连续刚构桥施工非对称应力分析  

Analysis of asymmetric stress in construction of continuous radial frame bridge with small radius

作　　者：罗涛 LUO Tao(Guangzhou Phoenix Mountain Tunnel Construction Co.,Ltd.,Guangdong Guangzhou 510080 China)

机构地区：[1]广州市凤凰山隧道建设有限公司,广东广州510080

出　　处：《山东交通科技》2018年第4期97-100,104,共5页

摘　　要：某一联大跨度小半径预应力混凝土连续刚构弯桥采用有限元软件MIDAS/CIVIL建立了有限元模型,对其施工过程进行仿真模拟,得到了悬臂施工各梁段的预拱度、阶段累计挠度和内部应力的理论值,利用这些计算结果作为理论依据指导施工监控,重点考察了弯桥施工过程中,截面应力非对称性问题。A finite-element software MIDAS/CIVIL was used to build a finite-element model of large-span,small-span, small-radius, prestressed concrete continuous rigid frame. The finite element model of the curved bridge was constructed. The construction process was simulated and the pre-stressed beam sections were pre-prepared. The theoretical values of crown,phase cumulative deflection and internal stress are used as the theoretical basis to guide construction monitoring. The problem of cross-section stress asymmetry during the construction of curved bridges is inspected.

关 键 词：连续刚构弯桥 施工监控 预拱度 非对称截面应力 

分 类 号：TU279.7[建筑科学—建筑设计及理论] U445.466[建筑科学—桥梁与隧道工程]