- 摘 要
-
席季柳1,2，盧春玲1，2，鄭艷1
(1 廣西巖土力學(xué)與工程重點實驗室， 桂林 541004；
2 桂林理工大學(xué)土木與建筑工程學(xué)院， 桂林 541004)
［摘要］部分充填混凝土窄幅鋼箱連續(xù)組合梁主要由鋼筋混凝土翼板、下箱室充填混凝土的窄幅鋼箱梁和抗剪連接件組成。通過2根部分充填混凝土窄幅鋼箱組合梁彎曲性能試驗研究，對比考察了部分充填混凝土窄幅鋼箱連續(xù)組合梁負彎矩區(qū)的受力全過程，分析了組合梁鋼板的局部屈曲特征，給出了鋼梁腹板屈曲應(yīng)力的簡化計算模型。試驗結(jié)果表明，鋼箱內(nèi)部分充填混凝土可以有效地提高負彎矩區(qū)的抗彎性能、梁的整體延性性能和受壓區(qū)鋼梁的穩(wěn)定性，能夠顯著地改善鋼板的局部屈曲性能。
［關(guān)鍵詞］部分充填混凝土窄幅鋼箱連續(xù)組合梁； 負彎矩區(qū)； 腹板； 局部屈曲
中圖分類號：TU398+.9文獻標(biāo)識碼：A文章編號：1002-848X(2016)02-0054-05
Analysis and experimental study on local buckling behavior of negative bending region of
partial-concrete-filled narrow-width steel box continuous composite beams
Xi Jiliu1,2, Lu Chunling1, 2, Zheng Yan1
(1 Guangxi Key Laboratory of Rock-soil Mechanics and Engineering, Guilin 541004, China;
2 College of Civil and Architecture Engineering, Guilin University of Technology, Guilin 541004, China)
Abstract:The partial-concrete-filled narrow-width steel box continuous composite beams is composed of the slab of reinforced concrete flange plate, narrow-width steel box beam with concrete filled in lower box and some shear connectors. Experimental research on bending performance of two partial-concrete-filled narrow-width steel box composite beams was carried out. The entire mechanical processes of negative moment regions of the partial-concrete-filled narrow-width steel box continuous composite beams were compared and investigated. The characteristics of local buckling of the composite beams′ steel plates were analyzed. A simplified calculation model of buckling stress for steel beams web was given. The experimental results show that steel box with partial-filled concrete can effectively improve the bending performance of the negative bending moment region, the overall ductility of the beams and stability of the steel beams in compression zone, and can significantly improve the performance of local buckling of the steel plate.
Keywords:partial-concrete-filled narrow-width steel box continuous composite beam; negative moment region; web; local buckling
*國家自然科學(xué)基金項目（51168011，51108109），廣西自然科學(xué)基金項目（2012GXNSFBA053148），廣西巖土力學(xué)與工程重點實驗室資助（11-CX-05）。
作者簡介：席季柳，碩士研究生，Email:1092733664@qq.com。
