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(1 中國航空規(guī)劃建設(shè)發(fā)展有限公司,北京 100120；2 北京交通大學(xué)，北京 100044)

［摘要］   結(jié)合貴陽奧體中心主體育場鋼結(jié)構(gòu)工程，對承受彎矩的大直徑鋼管相貫節(jié)點(diǎn)進(jìn)行了足尺模型極限承載力破壞試驗。對節(jié)點(diǎn)試驗過程和破壞現(xiàn)象進(jìn)行了深入研究，分析了各加載階段相貫節(jié)點(diǎn)的應(yīng)力分布情況及整個加載過程塑性區(qū)的發(fā)展過程，結(jié)合有限元分析對空間相貫節(jié)點(diǎn)破壞機(jī)理進(jìn)行分析研究，得出了此類節(jié)點(diǎn)的破壞模式，并對該類型鋼管相貫節(jié)點(diǎn)破壞判定準(zhǔn)則進(jìn)行探討。通過模型試驗來研究承受彎矩大直徑相貫節(jié)點(diǎn)的設(shè)計承載力，并分別與規(guī)范計算結(jié)果和有限元計算結(jié)果進(jìn)行對比分析，提出設(shè)計建議，為有關(guān)規(guī)范的修改及工程設(shè)計提供參考。應(yīng)用有限元計算方法研究腹桿偏心產(chǎn)生彎矩對空間相貫節(jié)點(diǎn)承載力的影響，對工程實際中經(jīng)常發(fā)生的施工偏差情況下節(jié)點(diǎn)的安全性判斷提出了建議。

［關(guān)鍵詞］節(jié)點(diǎn)試驗；空間相貫節(jié)點(diǎn)；破壞準(zhǔn)則；彈塑性有限元分析；彎矩

Full-scale model experiment and research of large diameter steel tubular spatial penetrated joint subject to moment

Liu Xingang1, Ge Jiaqi1, Zhang Guojun1, Wang Shu1, Wang Yaofeng2, Zhao Ya2

(1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China;

2 Beijing Jiaotong University, Beijing 100044, China)

Abstract:The damage test of ultimate bearing capacity for the full-scale joint of large diameter penetrated pipes subject to moment was performed for the steel roof of the main stadium in Guiyang Olympic Sports Center. For the sake of further research on test process and damage phenomenon of the joint, both the damage pattern and the damage determination criteria of this type of joint were determined by analyzing the stress distribution of penetrated joint during each loading step and the plastic zone development process during the whole loading process, as well as the damage mechanics of spatial penetrated joint was studied by finite element analysis (FEA). The design bearing capacity of this joint subject to moment was studied through experiment, compared to the results from the local code and FEA, in order to provide some design advice and references for the revision of local code and design. The impacts of moment due to eccentricity of the web bar on the bearing capacity of the spatial penetrated joint were studied by FEA to provide some suggestions for the safety determination of this joint because of construction deviation in real projects.

Keywords:joint test; spatial penetrated joint; damage criteria; elasto-plastic finite element analysis; moment

貴州省科技廳工業(yè)攻關(guān)項目(［2010］3002)，貴陽市科技局工業(yè)攻關(guān)項目［2010］。

作者簡介：劉鑫剛，碩士研究生，Email:liuxingang525@163.com。

參考文獻(xiàn)

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［2］趙雅.大尺寸復(fù)雜空間相貫節(jié)點(diǎn)極限承載力足尺試驗研究［D］.北京：北京交通大學(xué)，2010.

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［5］陳以一，陳揚(yáng)驥.鋼管結(jié)構(gòu)相貫節(jié)點(diǎn)的研究現(xiàn)狀［J］.建筑結(jié)構(gòu)，2002，32(7):52-55.