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大跨度预内力空间结构在具体的工程设计和施工过程中尚存在若干问题.从预内力索杆、索膜和杂交体系中预内力的作用出发,讨论了目前各种预内力空间结构常用的索单元数值模型、计算分析方法如等效荷载法、缺陷长度法和初应变方法等及其适用范围.对预内力的作用、计算方法、初始内力的确定方法、参考构形的确定和计算方法等进行了初步的总结.为方便工程设计和实际施工张拉分析,对一些具体的技术细节给出了建议,可为预内力空间结构工程设计、施工和相关方面的研究提供参考.
The long-span pre-internal force spatial structure still has some problems in the concrete engineering design and construction process.From the role of pre-internal force in the pre-internal force rod, cable membrane and hybrid system, this paper discusses the current common force of various pre-internal force space structure Unit numerical model, calculation and analysis methods such as equivalent load method, defect length method and initial strain method, etc., and their applicable scopes. The function of pre-internal force, calculation method, initial internal force determination method, reference configuration determination and calculation method A preliminary summary is made.In order to facilitate the analysis of engineering design and actual construction tensioning, some specific technical details are given, which can provide references for the engineering design, construction and related research of pre-internal force space structure.