混凝土面板及施工对窄扁拱形组合网架桥稳定的影响
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摘要
一座长50m宽4.5m的扁拱形人行桥采用了由双层网架和混凝土面板组成的组合网架结构.在施工过程中安装完的网架作为混凝土面板的施工支架使用.为研究混凝土面板和施工对屈曲荷载的影响,利用AN SY S的单元生死功能对结构进行了非线性对比计算.分析表明,混凝土面板施工对最小几何非线性屈曲荷载系数λ影响不明显.混凝土面板可以明显加强网架的抗扭转屈曲能力,对λ影响较大.
The structure of a flat arch pedestrian bridge with 50m long and 4.5m wide uses a kind of composite space structure consisting of double-layer steel grids and reinforced concrete slab.After the assembly of the steel grids,it serves as the scaffold for the construction of concrete slabs.To investigate the effect of concrete slabs and construction on the stability of the structure,geometrically nonlinear finite element analysis is carried out using the function of element birth and death of ANSYS.Analysis shows that the effect of construction of concrete slabs on the minimum geometric nonlinear buckling load coefficient λ is not significant.The concrete slabs strengthen the torsional buckling capacity of the steel grids,and have an outstanding impact on λ.
The structure of a flat arch pedestrian bridge with 50m long and 4.5m wide uses a kind of composite space structure consisting of double-layer steel grids and reinforced concrete slab.After the assembly of the steel grids,it serves as the scaffold for the construction of concrete slabs.To investigate the effect of concrete slabs and construction on the stability of the structure,geometrically nonlinear finite element analysis is carried out using the function of element birth and death of ANSYS.Analysis shows that the effect of construction of concrete slabs on the minimum geometric nonlinear buckling load coefficient λ is not significant.The concrete slabs strengthen the torsional buckling capacity of the steel grids,and have an outstanding impact on λ.
引文
[1]董石麟,马克俭,严慧等.组合网架与空腹网架结构[M].杭州:浙江大学出版社.1992.
[2]刘锡良,董石麟.20年来中国空间结构形式创新[A].第十届空间结构学术会议论文集[C].中国建材工业出版社,2002:13-37.
[3]张华刚,马克俭,安竹石等.复合材料蜂窝形三角锥组合网架设计与研究[J].建筑结构.2002,32(9):36-39.
[4]陈向阳,罗尧治.M STCAD软件在组合网架设计中的应用[J].建筑结构,2002,32(3):62-63.
[5]罗尧治,陈向阳.组合网架的竖向地震响应分析[J].土木工程学报.2000,33(5):29-34.
[6]燕国强.山东金乡影视中心螺栓球组合网架屋盖设计[J].建筑结构学报,1993,14(6):67-71.
[7]朱忠义,董石麟.球面组合网壳结构的几何非线性稳定分析[J].空间结构,1996,2(1):1-11.
[8]赵阳,董石麟.组合网壳结构的几何非线性稳定分析[J].空间结构,1994(2):17-25.
[9]尹士公.组合网壳的非线性稳定分析和试验研究[J].土木工程学报,1996,29(6):33-39.
[10]周天华.平板网架与钢筋混凝土面板协同工作的新构想——协同网架[J].空间结构,1997,3(4):22-27.
[11]肖建春,马克俭,张华刚等.环行人行天桥的设计[J].建筑结构学报,1999,20(3):58-64.
[12]E l-She ikh A I.D es ign of top concrete slabs ofcom pos ite space trusses[J].In ternationa l Journa l ofS tructura l Eng ineering and M echan ics,1999,7(3):319-330.
[13]E l-She ikh A I,M cConne l R E.Experim en ta l study ofbehav iour of com pos ite space trusses[J].Journa l ofS tructura l Eng ineering,A SCE,1993,119(3):747-766.
[14]E l-She ikh A I.N on linear num erica l ana lys is ofcom pos ite space trusses[J].In ternationa l Journa l ofSpace S tructures,1994,9(4):219-226.
[2]刘锡良,董石麟.20年来中国空间结构形式创新[A].第十届空间结构学术会议论文集[C].中国建材工业出版社,2002:13-37.
[3]张华刚,马克俭,安竹石等.复合材料蜂窝形三角锥组合网架设计与研究[J].建筑结构.2002,32(9):36-39.
[4]陈向阳,罗尧治.M STCAD软件在组合网架设计中的应用[J].建筑结构,2002,32(3):62-63.
[5]罗尧治,陈向阳.组合网架的竖向地震响应分析[J].土木工程学报.2000,33(5):29-34.
[6]燕国强.山东金乡影视中心螺栓球组合网架屋盖设计[J].建筑结构学报,1993,14(6):67-71.
[7]朱忠义,董石麟.球面组合网壳结构的几何非线性稳定分析[J].空间结构,1996,2(1):1-11.
[8]赵阳,董石麟.组合网壳结构的几何非线性稳定分析[J].空间结构,1994(2):17-25.
[9]尹士公.组合网壳的非线性稳定分析和试验研究[J].土木工程学报,1996,29(6):33-39.
[10]周天华.平板网架与钢筋混凝土面板协同工作的新构想——协同网架[J].空间结构,1997,3(4):22-27.
[11]肖建春,马克俭,张华刚等.环行人行天桥的设计[J].建筑结构学报,1999,20(3):58-64.
[12]E l-She ikh A I.D es ign of top concrete slabs ofcom pos ite space trusses[J].In ternationa l Journa l ofS tructura l Eng ineering and M echan ics,1999,7(3):319-330.
[13]E l-She ikh A I,M cConne l R E.Experim en ta l study ofbehav iour of com pos ite space trusses[J].Journa l ofS tructura l Eng ineering,A SCE,1993,119(3):747-766.
[14]E l-She ikh A I.N on linear num erica l ana lys is ofcom pos ite space trusses[J].In ternationa l Journa l ofSpace S tructures,1994,9(4):219-226.
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