影响刚构桥施工阶段稳定性的若干因素探讨  

Discussion of the effects of several factors on the stability of rigid-frame bridge during construction

作　　者：李松[1] 唐英[2] 彭友松[1] 强士中[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]中铁西南科学研究院,四川成都610031

出　　处：《四川建筑科学研究》2007年第6期232-236,共5页Sichuan Building Science

基　　金：国家自然科学基金资助项目(50278079)

摘　　要：大跨度预应力混凝土连续刚构桥的稳定问题是这类桥梁设计和施工过程中的关键问题之一。本文利用三维空间数值仿真模型,考虑几何非线性、材料非线性以及钢筋混凝土的压碎、开裂、骨料嵌锁效应等多种非线性因素的影响,着重分析了预应力混凝土连续刚构桥悬臂施工阶段的稳定性问题。详细讨论了墩身初始缺陷、墩身断面尺寸、墩身配筋率等若干因素对预应力混凝土刚构桥施工阶段稳定性的影响效应。相关结论可为同类桥梁的设计和施工提供参考。The stability of long-span prestressed concrete rigid -frame bridges is a significant issue in the design and construction of the bridges. Taking into account the effects of geometrical nonlinearity, material nonlinearity, concrete crush, concrete crack and aggregate interlocking, etc. , this paper investigates the stability of prestressed concrete rigid-frame bridge during its cantilever construction by means of the 3D digital model. The effects of several factors, such as the initial pier imperfection, the dimensions of pier cross section and the ratio of reinforcement, etc. , on the stability are discussed in detail. The conclusions herewith can save as reference to the design and construction of the similar bridges.

关 键 词：稳定 影响因素 刚构桥 悬臂施工 

分 类 号：U445.446[建筑科学—桥梁与隧道工程]