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浙江大学学报(工学版)
J4  2014, Vol. 48 Issue (4): 711-720    DOI: 10.3785/j.issn.1008-973X.2014.04.022
土木工程     
桁腹式组合桁梁结构计算理论
王彤1, 谢旭1, 王渊2, 史鹏程3
1. 浙江大学土木工程学系,浙江 杭州 310058; 2. 杭州市市政公用建设开发公司,浙江 杭州 310009;
3. 宁波交通投资控股有限公司,浙江 宁波 315040
Analysis of prestressed composite truss girders with steel truss webs
WANG Tong1, XIE Xu1, WANG Yuan2, SHI Peng-cheng3
1. Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China; 2. Hangzhou Municipal Public
Construction and Development Company, Hangzhou 310009, China; 3. Ningbo Communications Investment
Holdings Limited Company, Ningbo 315040, China
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摘要：

针对用钢腹杆代替混凝土腹板的桁腹式钢桁架-混凝土组合桁梁结构的空间分析问题,提出桁腹式组合桁梁的弯曲、扭转和畸变计算方法.通过以抗剪等效为原则的等厚腹板换算,引入上下翼板独立轴向位移自由度的手法,在一般箱梁计算理论的基础上建立桁腹式组合桁梁空间分析的基本微分方程和单元刚度方程,推导了单元刚度矩阵的计算公式,给出该类桥梁结构预应力钢束的处理技术.通过与三维实体有限元计算结果的对比,检验了该算法的计算精度.提出的计算方法具有自由度少、计算简便、变形概念明确、与现行箱梁结构计算理论衔接的优点.
Abstract:

A new method for bending, torsion and distortion analysis of composite truss girders was proposed aiming at structural spatial analysis problems of prestressed composite truss girders that replace the web of concrete box girder with steel truss webs. The composite truss girder was converted into a thin-walled box girder based on shearing equivalence principle, and the deformation of top and bottom concrete flanges were represented by two independent displacement functions. The differential equilibrium equations and formulation for finite element analysis were derived based on the calculating method of regular box girders. Computing formulas of element stiffness matrix and formulation for prestressing tendons were also given. The precision of the method was validated by comparison with examples of three-dimensional finite element method. The method is practical for its fewer freedom, easy to use, definite deformation concept, and combination with existing analysis method of box girders.
出版日期: 2014-09-03
:  U 448  
基金资助:

国家自然科学基金资助项目（51378460）.
通讯作者: 谢旭，男，教授.     E-mail: xiexu@zju.edu.cn
作者简介: 王彤(1988—)，男，博士生，从事桥梁结构工程的研究. E-mail: wangtong@zju.edu.cn
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引用本文:

王彤, 谢旭, 王渊, 史鹏程. 桁腹式组合桁梁结构计算理论[J]. J4, 2014, 48(4): 711-720.

WANG Tong, XIE Xu, WANG Yuan, SHI Peng-cheng. Analysis of prestressed composite truss girders with steel truss webs. J4, 2014, 48(4): 711-720.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2014.04.022    或    http://www.zjujournals.com/eng/CN/Y2014/V48/I4/711

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