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不同的施工工艺对平面内外均搭接的圆钢管(CHS)空间KK型节点的静力性能会产生影响,为确定这种影响的大小,根据内隐蔽区焊接方式及插板布置方式的差异,共完成了9个节点静力试验,其中5个试件主要考察内隐蔽焊缝焊接方式的影响(未设置插板),2个试件设置插入弦杆的纵向插板以规避平面外搭接内隐蔽区焊缝,2个试件设置纵横向插板以规避所有内隐蔽区焊缝。通过试验考察了各空间搭接节点的受力性能和破坏模式,对比了内隐蔽区是否焊接、纵向插板是否插入弦杆,以及横向插板等对节点性能的影响。结果表明,内隐蔽区是否焊接对节点的应力分布有一定影响,但对节点承载力的影响较小;不插入弦杆的纵向插板在规避平面外搭接内隐蔽区焊缝的同时使节点承载力略有提高;插入弦杆的纵向插板对节点整体性能的加强作用显著,但同时降低了节点的延性;横向插板对节点性能的影响很小。采用经试验验证的有限元模型分析了内隐蔽区是否焊接及纵向插板对具有不同几何参数的节点承载力的影响,并综合试验分析结果给出了设计此类节点的建议。
Different construction techniques have an impact on the static performance of the KK-type joint in the round steel tube (CHS) space, both inside and outside the plane. In order to determine the magnitude of this effect, according to the difference of the welding mode and the layout of the inter- A total of nine nodes were completed static test, of which five specimens mainly investigated the impact of hidden welding seam welding method (not set flapper), two specimens inserted into the chord longitudinal flapper to avoid out-of-plane lap Within the hidden area weld, two specimens set vertical and horizontal flapper to avoid all the hidden area weld. Through the experiment, the force performance and failure mode of each space lapping joint are investigated. The influence of hidden area welding, whether the longitudinal insertion plate is inserted into the chord or not, and the transverse plate is compared. The results show that whether the concealed area is welded or not has some influence on the stress distribution of the joints, but it has less influence on the bearing capacity of the joints. Longitudinal flapper not inserted into the chords, The bearing capacity is slightly improved. The longitudinal flapper inserted into the chord significantly enhances the overall performance of the node, but also reduces the ductility of the node. The horizontal flapper has little effect on the node performance. The influence of the welding in the hidden region and the bearing plate on the bearing capacity of the joints with different geometrical parameters is analyzed by the experimentally verified finite element model. The design of such joints is given based on the experimental results.