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为了进一步摸清支承杆的承载能力,我们进行了一次共十组包括30根试件的支承杆压屈试验。在试验装置方面,尽量使其符合现场施工状况,加荷过程也使其接近现场的施工过程,以期能得到比较切合实际的结果。试验是在结构实验室的试验架上进行的。试验装置如图1所示。试验架型钢立柱之间设一活动横梁,以便调整不同的杆长。此横梁相当于提升架以固定千斤顶。下部支点为一段[20槽钢,槽口下焊钢板。在支点的位置于槽钢腹板上钻孔,并在底部之焊接钢板上钻成60°之锥孔,支承杆端部亦车成60°之倒角。此种构造,除符合杆件中心受
In order to further understand the bearing capacity of the support rods, we conducted a total of ten support rod buckling tests including 30 test specimens. In terms of test equipment, try to make it comply with the on-site construction conditions, and the loading process also makes it close to the site construction process in order to obtain more practical results. The test was conducted on a test stand in a structural laboratory. The test device is shown in Figure 1. A movable beam is set between the test stand steel columns to adjust the different beam lengths. This beam is equivalent to a lifting frame with a fixed jack. The lower fulcrum is a section of [20 channel steel, welded steel plate under the slot. In the position of the fulcrum, drilled holes in channel steel webs, and drilled 60° taper holes in the welded steel plate at the bottom, the end of the support rods were also chamfered by 60°. This configuration, in addition to the center of the rod member