夹芯彩钢墙面板节点抗剪试验研究

RESEARCH ON JOINT SHEAR TEST OF COLORED-STEEL SANDWICH WALL PANEL

通过对与檩条连接的岩棉夹芯墙面板节点抗剪试验,研究夹芯彩钢墙面板在受到自重以及由上面传下来荷载时,其连接节点的受力形式以及随着荷载的增加,节点的破坏过程和破坏特征。试件尺寸为1 000 mm×50 mm,钢板厚度0.5 mm,共2个试件。通过观察发现,夹芯彩钢墙面板连接节点破坏的主要原因是:自攻螺钉由于受到剪力作用,在其与檩条连接处产生力矩,使其发生倾斜,导致自攻螺钉帽斜向接触墙面板,以致钉帽周围局部压力过大,使钢板屈服,最终节点破坏。

The load-bearing characteristic, destructive procedure and the failure mode of the joint are investigated by joint shear test of wall panel which connected to the purlin, when the wall panel is carrying the dead load and the loads from the above wall panels. The dimension of the specimen is 1 000 mm × 50 mm, the thickness of steel plate is 0.5 mm, and the total number of the specimen is 2. According to the test results, the first cause that leads to the failure of the wall panel joint is that, the self-threading screw is inclined when the force moment is created at the contact position, and the cap of screw is contacted with the wall panel in a certain angle, which leads to higher local pressure and makes the steel plate yielding.