空間足尺組合式連接節(jié)點(diǎn)受力性能研究
發(fā)布時(shí)間：2018-10-18 20:37
【摘要】：以某大型特高壓用鋼管格構(gòu)式變電構(gòu)架工程為背景,對(duì)空間足尺組合式連接節(jié)點(diǎn)進(jìn)行空間靜力加載試驗(yàn)和有限元分析,著重研究節(jié)點(diǎn)的應(yīng)力應(yīng)變及位移發(fā)展特征、破壞模式和極限承載性能。試驗(yàn)結(jié)果表明:設(shè)計(jì)荷載下,除主管與節(jié)點(diǎn)板連接處的端部由于應(yīng)力集中而出現(xiàn)輕微局部屈服外,節(jié)點(diǎn)其他部位仍處于彈性階段;加載至設(shè)計(jì)荷載的近190%時(shí),主管受力較大端出現(xiàn)受壓"鼓曲",主管與節(jié)點(diǎn)板1(JDB1)的連接處嚴(yán)重"凹陷",隨即支管(7)的插板與JDB1連接處發(fā)生受壓"失穩(wěn)",節(jié)點(diǎn)破壞。有限元模型的分析結(jié)果,在節(jié)點(diǎn)應(yīng)變發(fā)展、荷載-位移曲線、破壞模式、極限承載力等方面均與試驗(yàn)結(jié)果吻合較好。該類型節(jié)點(diǎn)的構(gòu)造基本合理,滿足設(shè)計(jì)荷載要求。建立節(jié)點(diǎn)承載力的理論分析模型及計(jì)算公式,理論計(jì)算結(jié)果與試驗(yàn)結(jié)果、有限元分析結(jié)果吻合較好。
[Abstract]:Based on a large ultra-high pressure steel tube latticed transformer frame project, the spatial static loading test and finite element analysis of the space full-scale composite connection are carried out, and the stress strain and displacement development characteristics of the joints are emphatically studied. Failure mode and ultimate bearing capacity. The test results show that the other parts of the joint are still in the elastic stage except for the slight local yield at the end of the joint between the supervisor and the joint due to the stress concentration, and when the design load is nearly 190th, the test results show that the joint is still in the elastic stage under the design load. The "bulging" appeared at the larger end of the supervisor, the joint between the supervisor and the joint plate 1 (JDB1) was seriously "depressed", then the joint of the branch pipe (7) and the JDB1 joint was subjected to compression "instability" and the joint was destroyed. The results of finite element model are in good agreement with the test results in the aspects of joint strain development, load-displacement curve, failure mode, ultimate bearing capacity and so on. The structure of this type of node is basically reasonable and meets the requirements of design load. The theoretical analysis model and calculation formula of the bearing capacity of joints are established. The results of theoretical calculation are in good agreement with the experimental results, and the results of finite element analysis are in good agreement.
【作者單位】： 重慶大學(xué);桂林理工大學(xué);
【基金】：中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(CDJZR12200010)
【分類號(hào)】：TM63
，
本文編號(hào)：2280302
[Abstract]:Based on a large ultra-high pressure steel tube latticed transformer frame project, the spatial static loading test and finite element analysis of the space full-scale composite connection are carried out, and the stress strain and displacement development characteristics of the joints are emphatically studied. Failure mode and ultimate bearing capacity. The test results show that the other parts of the joint are still in the elastic stage except for the slight local yield at the end of the joint between the supervisor and the joint due to the stress concentration, and when the design load is nearly 190th, the test results show that the joint is still in the elastic stage under the design load. The "bulging" appeared at the larger end of the supervisor, the joint between the supervisor and the joint plate 1 (JDB1) was seriously "depressed", then the joint of the branch pipe (7) and the JDB1 joint was subjected to compression "instability" and the joint was destroyed. The results of finite element model are in good agreement with the test results in the aspects of joint strain development, load-displacement curve, failure mode, ultimate bearing capacity and so on. The structure of this type of node is basically reasonable and meets the requirements of design load. The theoretical analysis model and calculation formula of the bearing capacity of joints are established. The results of theoretical calculation are in good agreement with the experimental results, and the results of finite element analysis are in good agreement.
【作者單位】： 重慶大學(xué);桂林理工大學(xué);
【基金】：中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金(CDJZR12200010)
【分類號(hào)】：TM63
，
本文編號(hào)：2280302
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