成都金沙演艺综合体自由曲面单层网壳连体结构设计研究OA

The free-form single-layer reticulated shell serves as the connecting link in the Chengdu Jinsha Performing Arts Complex.It extends from the roof to the facade,forming a spatially twisted shape,and is rigidly connected to the tower facades.Owing to its novel configuration and connection scheme,issues such as the mechanical mechanism and dynamic stability of the link,as well as its interaction with the towers,require systematic investigation.Decomposition analysis was employed to study the mechanical behavior of the link,revealing that stiffness and section strength are the dominant factors governing its static performance.On this basis,optimization analyses were carried out regarding its support constraints and geometry.Parameter sensitivity analysis was used to investigate the collaborative working mechanism of the free-form single-layer reticulated shell connected structure,with the aim of achieving the design objective of"strong connections,weak linkage."Concurrently,a recommended limit for the period ratio of the towers was proposed as a key design index.To address the dynamic stability problem of the link caused by the relative movement of the towers under seismic action,a dynamic stability analysis method for the connecting link was developed.The results indicate that the connecting link possesses a sufficient safety margin in terms of dynamic stability under severe earthquakes.Finally,an overall yield mechanism and mechanical analysis of the key joints were conducted.The results demonstrate that the structure exhibits a favorable yield mechanism,and that the bearing capacity and stiffness of the joints meet the design objectives.