大跨度张弦立体桁架受力性能研究

Force performance study of the truss string structures with long span

针对黄河口模型厅原方案156m跨张弦立体桁架工程,采用ANSYS程序进行理论分析,详细研究了荷载态(4种工况)下,结构的初始预应力、矢跨比、垂跨比和桁架截面高度等参数的变化对结构受力性能的影响。通过结果对比分析,得出了大跨度张弦立体桁架结构设计的一些特点,并给出了初始预应力、矢跨比、垂跨比和桁架截面高度等参数的建议值,进而为黄河口模型厅张弦立体桁架结构设计提供了参考。

The mechanics performance of the 156m-span truss string structures（TSS） of Yellow River model testing center building under loading was analyzed,which is influenced by four parameters including initial pretension of cable,rise-span ratio of arch,sag-span ratio of cable and the height of truss cross section.ANSYS program was adopted on the theoretical analysis.Some valuable features about the long span TSS design were gotten through comparison analyses.Some propositional numerical value of the parameters mentioned above is provided,and which additional provides some useful reference for the initial design of Yellow River model testing center building.