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膜结构螺栓夹板与U形夹具连接节点的破坏试验研究
Experimental study on the failure of the joint membrane structure bolt splint and U-shaped clamp Fixture
投稿时间: 2017-03-18  最后修改时间: 2017-06-04
DOI:
中文关键词:  拉伸膜结构  螺栓夹板  U形夹具  节点破坏
英文关键词:tensioned membrane structure  bolt splint  U-shaped fixture  node failure
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
焦东 辽宁工程技术大学 34479647@qq.com 
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中文摘要:
      摘要:针对张拉膜结构节点因设计不合理、不恰当和节点连接件的松动和脱落,造成膜结构由局部延伸至整体破坏的问题。通过试验研究和数值模拟分析的方法,探究单向与双向拉伸对膜面节点承载力的影响程度,进一步研究膜结构采用螺栓夹板和U形夹具的连接方式对膜面节点应变的影响,以及膜面在竖向和横向施加不同比例荷载时节点的传力和破坏机理。试验结果表明:膜面在双向拉伸的情况下,其膜面承载力要高于单向拉伸时膜面的承载力,并且在双向拉伸中,横向与竖向拉力越接近,其膜面承载力越高;采用螺栓夹板连接,其节点主应力方向上的应变比U形夹具连接的节点应变要小,在以后膜结构节点连接方面,应该采用有更多膜面和边绳参与与夹板摩擦和挤压的这种连接方式,这样节点的传力方式才更为合理。
英文摘要:
      Abstract:Aiming at the problem that the membrane structure node due to unreasonable design, improper and node connection loosening and shedding caused by local membrane structure extends to the whole failure.In this paper, through the experimental study and numerical simulation analysis,the influence degree of uniaxial and biaxial stretching on the bearing capacity of the membrane is studied, and the connection method of the bolt clamp and the connection way of the U-shaped fixture are further studied. The influence of the membrane surface strain, and the force and failure mechanism of the membrane surface when the load is applied in different proportions. The results show that the bearing capacity of the membrane surface is higher than that of the membrane surface in the case of uniaxial tension. And in the biaxial stretching, the horizontal and vertical tension closer, the higher the bearing capacity of the membrane. The strain in the direction of the main stress of the joint is smaller than that of the U-shaped fixture, In the future connection of the membrane structure nodes, should be used to have more membrane and side rope to participate in the friction and squeeze with the splint of this connection, so that the way the force of the node is more reasonable.
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