鋼管混凝土格構(gòu)式風(fēng)電機塔架節(jié)點靜力性能試驗研究*
李斌1，喬明1，高春彥1,2
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李斌1，喬明1，高春彥1,2（1 內(nèi)蒙古科技大學(xué)建筑與土木工程學(xué)院， 包頭 014010；2 南京航空航天大學(xué)航空宇航學(xué)院， 南京 210016)［摘要］對6個鋼管混凝土格構(gòu)式風(fēng)電機塔架焊接相貫節(jié)點和焊接管板節(jié)點進行了縮尺模型試驗，研究了這兩種塔架節(jié)點的破壞機理和破壞特征、節(jié)點進入塑性后的變形發(fā)展過程以及節(jié)點交匯區(qū)域的復(fù)雜應(yīng)力狀態(tài)和分布規(guī)律。試驗結(jié)果表明：塔柱鋼管內(nèi)混凝土的存在，使鋼管混凝土節(jié)點的破壞模式和力學(xué)性能與空鋼管節(jié)點大大不同，鋼管混凝土相貫節(jié)點的破壞形態(tài)為受壓腹桿局部屈曲破壞，管板節(jié)點的破壞形態(tài)為節(jié)點板受壓屈曲和受拉撕裂破壞，沒有出現(xiàn)節(jié)點區(qū)塔柱管壁在受拉、受壓腹桿接頭處的塑性變形失效。由試驗結(jié)果還得到：兩種節(jié)點交匯處塔柱管壁以及節(jié)點板的應(yīng)力分布極不均勻，個別測點已經(jīng)進入塑性而有的測點仍然處于彈性階段。由破壞形態(tài)和節(jié)點區(qū)的應(yīng)力分布情況得到了一些設(shè)計建議，為實際工程塔架節(jié)點的設(shè)計提供參考。［關(guān)鍵詞］鋼管混凝土； 格構(gòu)式塔架； 相貫節(jié)點； 管板節(jié)點； 靜力性能中圖分類號：TU398 文獻標識碼：A 文章編號：1002-848X(2013)05-0035-04Static behavior study on latticed concrete-filled steel tubular wind turbine tower jointsLi Bin1, Qiao Ming1, Gao Chunyan1,2(1 Architecture and Civil Engineering Institute, Inner Mongolia University of Science and Technology, Baotou 014010, China; 2 College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)Abstract: Six latticed concrete-filled steel tubular (CFST) wind turbine tower K-shape joints were carried on the static load test, which included the weld intersecting joint and the gusset plate joint. The failure mechanism and characteristics on the two kinds of K-shape joints, the deformation development process after joints entered plastic stage and the stress state and distribution of joint intersection area were studied. The results show that the failure mode and mechanical behavior of CFST K-shape joints are greatly different from that of the hollow steel tubular K-shape joints because of the existence of core concrete, the failure mode of the weld intersecting joints show the local buckling of compression web member and that of the gusset plate joints present as the compression buckling and tension tearing of the gusset plates, while the plastic deformation failure of tower column tube wall in joint area is not appear. It is also shown by test results that the stress distribution of tower column tube wall and gusset plate in joint intersection is extremely non-uniform, individual parts already enter plastic state but some other parts are still in elastic state. According to the failure mode and stress distribution conditions of the two kinds of K-shape joints, some design suggestions are drawn, which can provide reference for the latticed CFST wind turbine tower joints.Keywords: concrete-filled steel tube; latticed tower; weld intersecting joint; gusset plate joint; static behavior*國家自然科學(xué)基金項目（51068021），包頭市科技攻關(guān)項目（2010Z1002，2011Z1006），內(nèi)蒙古自然科學(xué)基金項目（2012MS0711）。作者簡介：李斌，博士，教授，Email:btlibin@189.cn。參考文獻［1］芮曉明, 柳亦兵, 馬志勇. 風(fēng)力發(fā)電機組設(shè)計［M］. 北京: 機械工業(yè)出版社, 2010.［2］鮑侃袁, 沈國輝, 孫炳楠，等. 高聳鋼管塔K型結(jié)點極限承載力的試驗研究和理論分析［J］. 工程力學(xué), 2008,25（12）:114-121.［3］宋謙益. 圓鋼管混凝土鋼管K形節(jié)點的力學(xué)性能研究［D］. 北京：清華大學(xué), 2009.［4］舒興平. 高等鋼結(jié)構(gòu)分析與設(shè)計［M］. 北京:科學(xué)出版社,2006.［5］JEFFREY A PACKER. Concretefilled HSS connections ［J］. Journal of Structural Engineering, 1995,121（3）:458-467.［6］GB 50017—2003 鋼結(jié)構(gòu)設(shè)計規(guī)范［S］. 北京: 中國計劃出版社, 2003.［7］喬明. 鋼管混凝土格構(gòu)式風(fēng)電塔架節(jié)點受力性能研究［D］.包頭：內(nèi)蒙古科技大學(xué),2012.
