无环索预应力索支结构新体系  

Innovation of non-loops cable-supported structures

作　　者：薛素铎[1] 刘人杰 李雄彦[1] 邹瑶 刘越 XUE Su-duo;LIU Ren-jie;LI Xiong-yan;ZOU Yao;LIU yue(Spatial Structures Research Center,Beijing University of Technology,Beijing 100124,China;School of Civil Engineering,Yantai University,Yantai 264005,China)

机构地区：[1]北京工业大学空间结构研究中心,北京100124 [2]烟台大学土木工程学院,山东烟台264005

出　　处：《空间结构》2020年第4期15-22,共8页Spatial Structures

基　　金：国家自然科学基金项目(51778017,51878014);北京市自然科学基金项目(8172011);烟台大学博士启动项目(TM18B25)。

摘　　要：现有预应力空间结构有很多采用环索,环索是结构关键构件且索力巨大.环索作为关键构件不利于结构抗连续倒塌,环索拉力巨大增加了结构设计、施工等方面的难度.为解决以上问题,提出了无环索预应力索支结构新体系,详细介绍了新体系的构成、结构特点、理论与试验研究进展.目前为止,已经研发出无内环空间索桁结构、无内环单层索支结构、无环索弦支穹顶结构和无环索大开口索承网壳结构等具体形式.基于理论与试验研究成果发现,无环索预应力索支结构新体系具有很好的抗连续倒塌性能,索力分布均匀、拉力显著降低,而且易于制作和施工,具有很强的工程实践可行性.Many existing prestressed spatial structures use loop cables.Loop cables are usually key elements and tensions of loop cables are usually huge.Loop cables working as key element are not conducive to resisting progressive collapse,The huge tensions greatly increase difficulty in structural design and construction.In order to solve the problems above,non-loops cable-supported structures(NLCS)which were cable-supported structural systems without loop cables were proposed.The classification,structural characteristics,theoretical and experimental research progress about it were introduced in detail.So far,specific forms such as non-loops spatial cable-truss structure,non-loops single-layer cable-supported structure,non-loops suspen-dome,and non-loops large open cable-supported shell have been developed.Based on theoretical and experimental research results,it is concluded that non-loops cable-supported structures have good resistance to progressive collapse,and tensions are significantly reduced.In addition,it is easy to be manufactured and constructed.Therefore,it has strong engineering practice feasibility.

关 键 词：预应力空间结构 无环索预应力索支结构 无内环空间索桁结构 无内环单层索支结构 无环索弦支穹顶结构 无环索大开口索承网壳结构 

分 类 号：TU394[建筑科学—结构工程]