新型双竖腹杆空腹桁架梁及其等代刚度法研究  

Research on new vierendeel truss beam with double vertical web members and its equivalent solid beam flexibility method

作　　者：梁弢 沈睿麟 肖建春[2,3] 冯梅 陈顺云 LIANG Tao;SHEN Ruilin;XIAO Jianchun;FENG Mei;CHEN Shunyun(Institute of Engineering Investigation and Design,Guizhou University,Guiyang 550025,China;Research Center of Space Structures,Guizhou University,Guiyang 550025,China;Key Laboratory of Structural Engineering of Guizhou Province,Guiyang 550025,China;School of Civil Engineering,Guizhou Institute of Technology,Guiyang 550003,China)

机构地区：[1]贵州大学勘察设计研究院,贵阳550025 [2]贵州大学空间结构研究中心,贵阳550025 [3]贵州省结构工程重点实验室,贵阳550025 [4]贵州理工学院土木工程学院,贵阳550003

出　　处：《建筑结构》2025年第6期31-36,共6页Building Structure

基　　金：国家自然科学基金项目(50978064/E080502);贵州省自然科学基金项目(黔科合基础[2017]1036);贵州大学创新基金项目(贵大勘察[2022]04)。

摘　　要：为进一步降低用钢量,解决传统空腹桁架竖腹杆端弯矩大的设计难点,基于空腹桁架梁内力分布规律,提出新型双竖腹杆空腹桁架梁结构。以遵义某演艺综合体大跨度屋面为工程背景,采用ANSYS Workbench构造响应面对结构进行优化设计后,与单竖腹杆空腹桁架梁进行对比,结果表明:新型结构用钢量降低25%,腹杆剪力和杆端弯矩大幅降低,解决了传统空腹桁架的设计难点。推导了新型结构等效惯性矩和等效剪切刚度的计算公式,代入图乘法可快速计算挠度,与有限元结果对比误差仅为2.6%,说明该计算方法具有较高的可靠性。In order to further reduce the steel consumption and solve the design difficulty of the large end bending moment of the vertical web members in traditional vierendeel truss,a new structure named vierendeel truss beam with double vertical web members was proposed based on the internal force distribution law of vierendeel truss beam.Taking the long⁃span roof of a certain performing arts complex in Zunyi as the engineering background,the structure was optimized by ANSYS Workbench response surface and compared vierendeel truss beam with the single vertical web members,the results show that:the steel consumption of the new structure is reduced by 25%,the shear force of the web members and the end bending moment of the members are greatly reduced,and the design difficulty of the traditional vierendeel truss are solved.The calculation formulas for the equivalent moment of inertia and equivalent shear stiffness of the new structure have been derived.By substituting them into the graphical multiplication method,the deflection can be quickly calculated.The comparison with the finite element results shows that the error is only 2.6%,indicating that this calculation method has high reliability.

关 键 词：空腹桁架 双竖腹杆 优化设计 等代刚度法 

分 类 号：TU393[建筑科学—结构工程]