半球形滑动式索撑节点性能分析  

Research on Mechanical Properties of Hemispherical Slide Cable-Strut Joints

作　　者：赵曦 罗超逸 张艳霞 王庆博[1] ZHAO Xi;LUO Chaoyi;ZHANG Yanxia;WANG Qingbo(School of Civil and Transportation Engineering,Beijng University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京建筑大学,北京未来城市设计协同中心,北京100044

出　　处：《工业建筑》2022年第8期132-139,共8页Industrial Construction

基　　金：国家自然科学基金重点项目(52130809);国家自然科学基金面上项目(51878025);长江学者和创新团队发展计划项目(IRT_17R06);促进高校内涵发展定额项目-北京市人才项目青年学者-赵曦(02082721010);北京建筑大学博士研究生科研能力提升项目(DG2021010)。

摘　　要：以索穹顶、弦支穹顶等为代表的预应力张拉整体结构外形新颖美观,具有较高的结构效率。索穹顶或弦支穹顶在张拉环索施加预应力成形的过程中,环索和索撑节点由于摩擦会造成预应力损失,导致成形后的预应力结构力学性能大幅下降。提出一种新型半球形滑动式索撑节点,半球形盖板易于连接多方向的构件,滚轮嵌有滚动轴承从而降低了与中轴的摩擦系数,有效降低预应力损失率。利用ABAQUS对半球形滑动式索撑节点力学性能进行了有限元分析,并通过对比试验实测数据验证了有限元模型的可靠性。有限元分析表明,该索撑节点性能良好,满足设计要求。通过比较有限元和试验结果,该节点在实际工况下预应力损失取值大约为4.2%,相较于传统的索撑节点10%以上的预应力损失得到大幅降低。The prestressed tension overall structure represented by cable dome and suspended dome is novel and beautiful in appearance and has high structural efficiency.During the tensioning process of cable dome and suspended dome, the friction between the ring cable and the cable strut joint will cause the loss of prestress, which will lead to a significant decrease in the mechanical properties of the prestressed structure after forming. A new type of hemispherical sliding cable strut joint was proposed. The hemispherical cover plate is easy to connect multi-directional components, and the rollers are embedded with rolling bearings, which reduces the friction coefficient with the central axis and effectively reduces the prestress loss rate. The finite element analysis of the mechanical properties of the hemispherical sliding cable-strut joint was carried out by ABAQUS, and the reliability of the finite element model was verified by comparing the measured data of the experiment. Finite element analysis showed that the cable-strut joint had good performance and could meet the design requirements. By comparing the finite element and test results, the prestress loss of this joint was about 4.2% under the actual working conditions, which was greatly reduced compared to the traditional cable-strut joint with a prestress loss of more than 10%.

关 键 词：索穹顶 索撑节点 预应力损失 滚动轴承 有限元分析 

分 类 号：TU399[建筑科学—结构工程]