摘要
为了深入研究泰州长江大桥群桩基础的工后沉降问题。采用黏弹性理论,结合室内流变试验,阐述了理论中两类参数(拉压模量与拉压黏性系数和剪切模量与剪切黏性系数)物理概念的区别及其不同的适用范围。从理论上推导了广义K elv in模型中两类参数的相互转换关系,并建立了将黏弹性系数转化为P rony级数的计算公式,从而将室内流变试验数据通过上述研究结果应用于泰州大桥,采用ABAQU S软件对其工后沉降进行了数值计算分析。结果表明,泰州长江大桥的群桩基础沉降历时发展,经30 a收敛完成,其工后沉降量占最终沉降量的20%。采用上述理论和方法考虑地基流变特性计算泰州长江大桥群桩基础工后沉降是合理可行的,可为同类型特大桥梁工程群桩基础工后沉降计算提供可资借鉴的方法。
To deeply research the post-construction settlement of pile group foundation for Taizhou Yangtze River Bridge, the physical conception differences and the different application scopes of the two types of parameters were described by the viscoelasticity theory combined with rheological laboratory tests. Transformation relation between these two types of parameters was established theoretically. A formula for transforming viscoelastic coefficients to prory series was developed. According to the research results, the rheological laboratory test data were applied to the numerical analysis of the post-construction settlement by ABAQUS software. Calculation results reveal that the settlement of Taizhou Yangtze River Bridge will lasts for nearly 30 years and the post-construction settlement almost accounts for 20% of the final settlement, that it＇s reasonable and feasible to calculate the post-construction settlement considering the foundation rheological properties for Taizhou Yangtze River Bridge with the above-metioned theories and methods. The method can provide useful reference for the same type bridge engineering.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2009年第6期570-574,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(0872179)
交通运输部2008年度部省联合攻关项目(2008-353-332-190)
上海市重点学科建设项目(B308)
关键词
群桩基础
工后沉降
黏弹性模型
参数转换关系
数值分析
pile group foundation
post-construction settlement
viscoelastic model
transformation relation of parameters
numerical analysis
