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Basic Forms of Membrane Structure Connections

Date: 2022-04-01 Author: 科琦气膜

  根据深圳市膜结构连接节点的研究现状,通过对现有膜结构中常见连接节点组成的调查、分类和梳理,提出了这些节点类型的基本连接结构形式

  膜结构工程中常用的几个连接点

  热封连接:将膜边缘粘接区域内膜材上的涂层加热,使其熔化,并对其施加一定时间的压力,使膜材牢固连接在一起。加热方式包括高频热封、热风热封、热烙铁等。

  粘接连接:

  两个膜单元通过特殊的胶水和粘合剂粘合在一起,膜的内力通过粘合剂或膜的化学溶解涂层传递。有很多种方法,如搭接接头、单包层对接接头、双包层对接接头等。搭接接头的宽度取决于膜的内应力和粘合剂的强度。粘接连接

  主要用于强度要求较低的连接或现场修补,以及不能焊接或无涂层织物的材料连接。

  缝合连接:这是一种古老的连接方法。载荷通过缝合和摩擦传递。

  传递的载荷大小与缝线强度、母材撕裂强度、缝线数量、缝线宽度、缝线分布和缝线形式有关。可采用平缝、折缝、双层折缝。缝合连接在现代膜结构中很少使用。一般用于不能采用其他连接方式或膜内应力较小的结构和非应力结构的连接。也可与热密封连接件配合使用,作为加强件。

  螺栓压板连接:是现代膜结构中广泛使用的一种连接结构。

  上下压板通过螺栓夹住薄膜材料,产生摩擦。膜套中的侧绳靠近压板传递挤压力。

  螺栓压力板连接通常用于大型膜单元的现场安装,以及膜单元和边界组件之间的连接。

  型材夹连接:与螺栓压板连接不同的是,用成型夹代替压板,将侧绳放入夹中,膜面内力通过侧绳挤压夹传递。

  本实用新型施工方便快捷,

  避免损坏膜材料,外观更紧凑。因此,其成本相对较高。

  织带连接:是由侧绳、环、膜边(电缆或钢条)、织带等组成的张力和形状可调的连接方式。传力路径主要通过膜材传递到侧绳,从侧绳到环,再通过织带传递到电缆或钢条。本实用新型的优点是在安装过程中易于调整形状,并可根据情况的分布增减拉应力。缺点是安装费时费力,

  而且很难精确控制张力。因此,带状连接主要用于建筑草图或特殊环境。


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