波形钢腹板连续箱梁剪滞效应引起的附加轴力分析
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摘要
基于平截面假定并不计波形钢腹板惯性矩,建立了波形钢腹板两跨连续箱梁在三次抛物线剪滞翘曲位移函数下的附加轴力计算式.引入附加轴向应力比系数,分析了波形钢腹板混凝土两跨连续梁在均布荷载及跨中集中荷载作用下,附加轴向应力对结构受力性能的影响,分析表明:在两种荷载工况下,附加轴向应力比系数均小于1%,可以忽略其效应.
Under the condition of the plane section assumption and without considering the inertia moment of corrugated steel webs,this paper establishes the additional axial force formula for the two spans continuous box-girder bridge with corrugated steel webs based on a cubic parabola shear lag warping function.At the same time,it leads into the additional axial force stress ratio coefficient.Then it analyses the impact of additional axial stress to the influence degree of structural mechanical,which is based on the continuous box-girder bridge with corrugated steel webs under the full cross-uniformly distributed load and mid-span concentrated load.It shows that the value of additional axial stress can be ignored because the additional axial force stress ratio coefficient under the full cross-uniformly distributed load and the mid-span concentrated load is less than 1%.
Under the condition of the plane section assumption and without considering the inertia moment of corrugated steel webs,this paper establishes the additional axial force formula for the two spans continuous box-girder bridge with corrugated steel webs based on a cubic parabola shear lag warping function.At the same time,it leads into the additional axial force stress ratio coefficient.Then it analyses the impact of additional axial stress to the influence degree of structural mechanical,which is based on the continuous box-girder bridge with corrugated steel webs under the full cross-uniformly distributed load and mid-span concentrated load.It shows that the value of additional axial stress can be ignored because the additional axial force stress ratio coefficient under the full cross-uniformly distributed load and the mid-span concentrated load is less than 1%.
引文
[1]张士铎,邓小华.箱形薄壁梁剪力滞效应[M].北京:人民交通出版社,1998:1-51.
[2]赵楠.薄壁箱梁剪力滞效应分析综述[J].交通科技,2010(6):28-30.
[3]Chang S T.Shear lag effect in simply supported pres-tressed concrete box girder[J].ASCE,2004,9(2):178-184.
[4]冀伟,蔺鹏臻,刘世忠,等.波形钢腹板箱梁剪力滞效应的变分法求解[J].兰州交通大学学报,2010,29(6):16-19.
[5]万臻,李乔.现代斜拉桥不同截面形式的剪力滞效应分析[J].公路交通科技,2007,24(2):61-64.
[6]曹国辉,邓洁.比拟杆法分析薄壁箱梁桥剪力滞效应[J].森林工程,2003,19(6):38-40.
[7]田玉梅,张铁军.半刚构一连续箱梁剪力滞效应的三杆比拟法[J].森林工程,2008,24(1):68-70.
[8]郭金琼.箱形梁设计理论[M].北京:人民交通出版社,1991:18-31.
[9]祝明桥.混凝土薄壁连续箱梁剪力滞效应试验研究[J].中南大学学报,2008,39(2):375-379.
[10]冀伟,刘世忠,蔺鹏臻.波形钢腹板连续箱梁的自振频率分析[J].兰州交通大学学报,2011,30(3):1-4.
[11]万水.波形钢腹板预应力组合箱梁受力特性试验研究[J].黑龙江工程学院学报,2003,17(3):3-5.
[12]冀伟,刘世忠,蔺鹏臻.波形钢腹板连续梁的动力特性研究[J].世界地震工程,2011,27(4):149-155.
[13]陈宜言.波形钢腹板预应力混凝土桥设计与施工[M].北京:人民交通出版社,2009:27-35.
[14]蔺鹏臻,周世军,刘凤奎.抛物线型剪滞翘曲位移函数引起的附加轴力分析[J].工程力学,2010,27(8):90-93.
[15]李丽园.波形钢腹板组合连续箱梁剪力滞效应的理论与试验研究[D].兰州:兰州交通大学,2012:50-54.
[16]徐岳,朱万勇,杨岳.波形钢腹板PC组合箱梁桥抗弯承载力计算[J].长安大学学报:自然科学版,2005,25(2):60-64.
[2]赵楠.薄壁箱梁剪力滞效应分析综述[J].交通科技,2010(6):28-30.
[3]Chang S T.Shear lag effect in simply supported pres-tressed concrete box girder[J].ASCE,2004,9(2):178-184.
[4]冀伟,蔺鹏臻,刘世忠,等.波形钢腹板箱梁剪力滞效应的变分法求解[J].兰州交通大学学报,2010,29(6):16-19.
[5]万臻,李乔.现代斜拉桥不同截面形式的剪力滞效应分析[J].公路交通科技,2007,24(2):61-64.
[6]曹国辉,邓洁.比拟杆法分析薄壁箱梁桥剪力滞效应[J].森林工程,2003,19(6):38-40.
[7]田玉梅,张铁军.半刚构一连续箱梁剪力滞效应的三杆比拟法[J].森林工程,2008,24(1):68-70.
[8]郭金琼.箱形梁设计理论[M].北京:人民交通出版社,1991:18-31.
[9]祝明桥.混凝土薄壁连续箱梁剪力滞效应试验研究[J].中南大学学报,2008,39(2):375-379.
[10]冀伟,刘世忠,蔺鹏臻.波形钢腹板连续箱梁的自振频率分析[J].兰州交通大学学报,2011,30(3):1-4.
[11]万水.波形钢腹板预应力组合箱梁受力特性试验研究[J].黑龙江工程学院学报,2003,17(3):3-5.
[12]冀伟,刘世忠,蔺鹏臻.波形钢腹板连续梁的动力特性研究[J].世界地震工程,2011,27(4):149-155.
[13]陈宜言.波形钢腹板预应力混凝土桥设计与施工[M].北京:人民交通出版社,2009:27-35.
[14]蔺鹏臻,周世军,刘凤奎.抛物线型剪滞翘曲位移函数引起的附加轴力分析[J].工程力学,2010,27(8):90-93.
[15]李丽园.波形钢腹板组合连续箱梁剪力滞效应的理论与试验研究[D].兰州:兰州交通大学,2012:50-54.
[16]徐岳,朱万勇,杨岳.波形钢腹板PC组合箱梁桥抗弯承载力计算[J].长安大学学报:自然科学版,2005,25(2):60-64.
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