摘要
为发挥张拉整体结构和索穹顶结构各自的特点,拟在张拉整体三棱柱单胞基础上,通过单胞的组合及拼装形成环形张拉整体结构,并用其替代穹顶结构底部的刚性环梁支承,形成一种完全自平衡的新型张拉整体式穹顶结构。采用商用软件MATLAB和ANSYS对环形张拉整体结构和张拉整体式穹顶结构进行初始预应力找形及协同找形研究,并在此基础上探究张拉整体式穹顶结构的力学性能。研究结果表明,将索穹顶结构内嵌于通过不同单胞组装而成的环形张拉整体结构,可满足多样化的设计需求;协同找形后索穹顶和与索穹顶相连的内环索的预应力大幅减小;结构整体稳定性满足规范要求且结构具有较好的刚度,但相比于张拉整体环,索穹顶部分的刚度较小,建议实际工程中可适当提高索穹顶部分的安全储备。
In order to make full use of the properties of tensegrity structures and cable-dome structures,a novel self-balanced annular tensegrity-dome structure is formed by combining and assembling tensegrity triangular prism units,and by replacing the rigid ring beam at the bottom of the cable dome structure. Commercial software MATLAB and ANSYS are utilized to investigate the initial prestress finding and collaborative form finding of the annular tensegrity structure and tensegrity-dome structure,and the mechanical properties of the tensegrity-dome structure are explored. The results show that various design requirements can be satisfied by embedding the cable dome structure into an annular tensegrity structure which is assembled by different units. The prestress of the cable dome and the inner ring cable that connected to cable dome is significantly decreased. The global structural stability meets the requirements,and the structure has good stiffness.However,compared with the tensegrity structure,the stiffness of cable dome is less than that of the tensegrity structure.The safety reservation of cable dome could be enhanced properly in practical engineering.
作者
冯晓东
胡晋荣
撒剑波
杨伟家
罗尧治
FENG Xiaodong;HU Jinrong;SA Jianbo;YANG Weijia;LUO Yaozhi(College of Civil Engineering,Shaoxing University,Shaoxing 312000,China;Zhejiang Provincial Key Laboratory of Space Structures,Zhejiang University,Hangzhou 310058,China;Zhejiang Jinggong Steel Building Group Co,Ltd.,Shaoxing 312030,China)
出处
《建筑钢结构进展》
CSCD
北大核心
2022年第3期80-89,共10页
Progress in Steel Building Structures
基金
国家自然科学基金(51908356)
中国博士后科学基金(2019M662056)
浙江省自然科学基金(LQ19E080013)
绍兴文理学院国际科技合作项目(2019LGGH1005)。
关键词
张拉整体结构
索穹顶结构
三棱柱单胞
协同找形
力学性能
tensegrity structure
cable dome structure
triangular prism unit
collaborative form finding
mechanical property
