高层建筑用铝合金网壳结构节点受力测试

Joint stress test of aluminum alloy reticulated shell structure of high-rise buildings

为研究高层建筑中铝合金网壳结构结点的应力分布与抗弯刚度,选3005铝合金,按照铝合金网壳结构中工字型截面和盖板尺寸制备3个铝合金网壳结构节点试件。设计加载方式、加载点、位移测试点、应变测试点,进行加载试验。结果表明:测试点与载荷位置的距离越大,对外弯矩影响越小。螺栓孔周边薄弱,易拉断;达到极限载荷时,腹板应力分布符合平截面设定,盖板应力分布不均由螺栓群导致;试件A的极限载荷最大,为864.30 kN,表明承载力更好,试件C的抗弯刚度最好,为7.435 N/mm^(2)。

In order to study the stress distribution and flexural stiffness of the aluminum alloy reticulated shell structure nodes in high-rise buildings,3005 aluminum alloy was selected and three aluminum alloy reticulated shell structure nodes were prepared according to the I-shaped section and the size of the cover plate in the aluminum alloy reticulated shell structure. The loading test was carried out with designing the loading method,set the loading point,the displacement test point and the strain test point. The results show that the greater the distance between the test point and the load position,the smaller the influence on the external bending moment. The periphery of the bolt hole is weak and easily broken. When the ultimate load is reached,the stress distribution conforms to the plane section setting. When the load reaches the limit,the stress of some points increases significantly,and the stress distribution of the cover plate is uneven,which is caused by the bolt group. The maximum ultimate load of specimen A is 864.30 kN,indicating better bearing capacity. The maximum flexural stiffness of specimen C is 7.435 N/mm^(2).