再分式板片组合空间网壳结构体系及其稳定性能研究

The applicant first proposes the spatial shell structure system composed by plane plate components and subdivisible units. This structure has a number of advantages, which is weldless, no bending, assembled, easy to make and beautiful in shape. The simple plane plate components can be built into complex surface of spatial structure, which has great potential for future application, especially in some cambered shape and assembled structures . Because of the original concept and fully new system, this application plans to do research in the following technology path. Considering common steel, stainless steel and wood materials, this project systematically researches from “plate components” to “subdivisible units” to “combined shell”. Then formulas for the stability of plate components are summarized from “single plate” to “double plates” to “multiple plates”. The internal reason for stability of plates to be enhanced by “Multilevel” subdivisible units is discussed. The theory of modeling methods, strength and stability of the subdivisible plate structure spatial shell is studied. Proper and practical types of node are designed. Design theory, industrial manufacture and assembled construction technique on subdivisible plate structure spatial shell system are developed by researches of theory and experiment.

申请人首次提出了以平面板片构件与再分式单元组合的空间网壳结构体系，其无焊接、无压制、装配化、制作简单、造型美观的良好特点，实现简单的平面板片构建复杂的曲面空间网格结构，这在空间结构领域，尤其在一些曲面造型、装配式建筑中，将具有良好的应用前景。由于该结构体系为原创概念和全新体系，本项目将系统地从“板片构件”—“再分单元”—“组合网壳”的技术路径，考虑普通钢、不锈钢、木质等不同材料，建立“单肢”、“双肢”和“多肢”板片构件稳定计算公式，探讨“多级”再分单元对构件稳定能力增强特性，研究再分式板片组合空间网壳整体构形原理、强度和稳定性分析理论，研发合理、适用的装配式节点。通过理论和试验，完整形成再分式板片组合空间网壳结构的设计理论、工业化制造工艺、装配式施工技术。

板片构件具有自动化预制、高效化储运、装配化施工等独特的优势，符合智能工业化、环保可持续的空间结构未来发展方向。据此，本项目提出采用平面的板片构件来建造曲面的空间网壳结构，针对新型空间结构体系的设计计算理论和结构稳定性能的关键问题，开展了系统的理论与试验研究：（1）提出了再分式板片组合空间网壳结构体系概念，建立了这类结构体系的构型与形态设计优化理论。（2）建立了双肢板片构件轴压稳定性计算理论与设计方法。（3）探明了再分式结构单元对结构局部稳定性的强化机制。（4）明晰了再分式板片组合空间网壳结构静力稳定性失效机理与影响规律。（5）研究了再分式板片组合空间网壳结构的动力性能，提出了联合静动力数据的有限元模型修正方法。（6）形成了装配式板式节点设计及其半刚性性能计算方法。（7）建立了再分式板片组合空间网壳结构生产工艺与装配式组装流程。项目执行期内，荣获2020年国家科技进步一等奖1项，发表SCI、EI论文29篇，授权国家发明专利3项。项目成果为再分式板片组合空间网壳结构体系的设计与分析提供了理论依据，在一定程度上促进了空间结构的装配式、工业化的应用与推广，具有一定的应用前景。