(北京市建筑设计研究院 100045)
【提要】 结合张弦梁结构的特点，详细介绍了北京安福大厦中厅平面尺寸为504m×168m的双向张弦梁结构的布置和特点。研究表明，该张弦结构的刚度较大，对不对称荷载有较强的适应能力，且几何非线性程度不高，可以采用线性分析结果进行设计，并且针对张弦结构预应力值设计深入探讨了预应力值的确定原则，给出了确定预应力值的计算公式。
【关键词】 张弦梁 预应力 非线性分析
Design and Analysis of Two Way Beam String Structure in Anfu Building/Zhang Sheng,Gan Ming,Fan Bo(Beijing Institute of Architectural Design,Beijing 100045,China)
Abstract:The plan size of atrium of Beijing Anfu building is 504m×168m,two way beam string structure is adopted to support its roof.The layout and character of this project is described.By thorough investigation,its concluded that the rigidity of the beam string structure in this project is relatively large,and its nonlinearity is not obvious.The result of linear analysis can be combined for component design.This structure is adaptive for nonsymmetrical loading distribution.Value of string pretension is important in beam string structure design.The method of pretension value design is discussed thoroughly;the formula of pretension calculation is introduced.
Keywords:beam string structure;prestress;nonlinear analysis