| 引用本文: | 曹正罡,范峰,马会环,王伟.螺栓球节点试验及在单层网壳结构中的应用性[J].哈尔滨工业大学学报,2010,42(4):525.DOI:10.11918/j.issn.0367-6234.2010.04.005 |
| CAO Zheng-gang,FAN Feng,MA Hui-huan,WANG Wei.Experiment of bolt-ball joint and its application in single-layer reticulated shells[J].Journal of Harbin Institute of Technology,2010,42(4):525.DOI:10.11918/j.issn.0367-6234.2010.04.005 |
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| 摘要: |
| 为充分利用螺栓球节点的抗弯刚度,实现其在单层网壳结构中的应用,针对螺栓球节点开展力学试验研究,配合以精细化的有限元分析,获得节点的抗弯性能,并采用弯矩-转角关系来描述.利用ANSYS程序,采用弹簧单元模拟节点弯曲与扭转性能并将试验获得的弯矩-转角关系引入节点属性中,构建了螺栓球节点单层网壳的有限元模型.在此基础上系统开展了网壳结构的稳定性能研究.结果显示:采用螺栓球节点的网壳对于荷载不对称分布较为敏感,而且失稳过程中总伴随有节点的弯折效应;单层球面网壳的极限承载力最低可达到对应刚性节点网壳的32%,最高则超过98%,而单层柱面网壳则仅为10%,这表明此类节点可以应用在单层球面网壳中,但不宜在单层柱面网壳中采用. |
| 关键词: 单层网壳 螺栓球 承载力 试验 |
| DOI：10.11918/j.issn.0367-6234.2010.04.005 |
| 分类号:TU399 |
| 基金项目:中国博士后科学基金资助项目(20070420876);国家自然科学基金资助项目(50778054) |
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| Experiment of bolt-ball joint and its application in single-layer reticulated shells |
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CAO Zheng-gang, FAN Feng, MA Hui-huan, WANG Wei
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School of Civil Engineering,Harbin Institute of Technology,Harbin150090,China
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| Abstract: |
| The bolt-ball joint system with actual bend-bearing capacity can be used in single-layer reticulated domes.Both experimental study and sophisticated finite element analysis were carried out to obtain the bending capacity of the joint which was described by bending-rotation curves.The finite element model of a single-layer reticulated dome with bolt-ball joints was established by ANSYS,in which spring elements were used to simulate bending stiffness of the joint obtained experimentally.The stability of single-layer domes was analyzed.Results indicate that the single-layer dome with bolt-ball joints is sensible to asymmetry load distribution and its buckling is process always accompanied with bending of the joint.The critical load of a single-reticulated dome with bolt-ball joints is 32% as that of much as the rigid dome at least,and the percentage will be over 98% at most.But for a single-layer cylindrical reticulated dome,the percentage is only 10% ,indicating that the bolt-ball joint system can be used in single-layer reticulated domes,but should not be used in a single-layer cylindrical reticulated dome. |
| Key words: single-layer reticulated dome bolt-ball joint bearing capacity experiment |
