镀锌钢带加强的木-混凝土组合梁的承载力性能及其数值分析
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摘要
对两个采用镀锌钢带加强的木-混凝土组合梁试件进行了试验,分析了其力学性能和受弯破坏形态,得到了跨中荷载-位移曲线及组合梁沿截面高度的纵向应变分布.结果表明,两个组合梁试体在木肋与混凝土板之间和木肋与钢带之间,其界面都发生了滑移,但影响较小;钢带最终屈服和组合梁受力性能有所改善.通过数值分析得出,当极限荷载时加钢带的木-混凝土组合梁的位移值减小截面中和轴有所下降.
In the report,the static mechanical performance and damage mode of 2 specimens of timber concrete composite beam with galvanized steel strip were analyzed,and the load-deflection relationship,load-strain relationship along composite height direction was obtained. The data indicated that the interfaces between wood and concrete,wood and steel strip were moved,however,there were fewer impacts. The yield strength of steel strip and static mechanical performance of composite were improved. The results of numerical analysis showed that under ultimate load condition,the deflection and neutral axis of composite with galvanized steel strip decreased.
In the report,the static mechanical performance and damage mode of 2 specimens of timber concrete composite beam with galvanized steel strip were analyzed,and the load-deflection relationship,load-strain relationship along composite height direction was obtained. The data indicated that the interfaces between wood and concrete,wood and steel strip were moved,however,there were fewer impacts. The yield strength of steel strip and static mechanical performance of composite were improved. The results of numerical analysis showed that under ultimate load condition,the deflection and neutral axis of composite with galvanized steel strip decreased.
引文
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[2]滕学锋,曹宝珠,许超,等.冷弯薄壁型钢-OSB板楼盖的试验研究[J].吉林建筑工程学院学报,2009,26(2):1-5.
[3]Agel P,Klajmonova K,Lokaj A,et al.Carryingcapacity of semi-rigid joint of timber-concrete beams[C]//International Conference on Material,Environmental and Biological Engineering,2015.
[4]华晶.轻型木-混凝土混合结构整体有限元分析[D].上海:同济大学,2008.
[5]何慧娟,Frank Lam.北美轻型木结构住宅建筑的特点结构[J].结构工程师,2004,20(1):1-5.
[6]李硕.混凝土与木混合结构抗侧力试验[J].建筑结构,2013,43(增刊):731-735.
[7]Gerber A,Tannert T.Timber-concrete composites using flat-plate engineered wood products[J].Structures Congress,2015:2314-2325.
[8]胡夏闽,李巧,彭虹毅,等.木-混凝土组合梁静力试验研究[J].建筑结构学报,2013,34(51):5-6.
[9]胡夏闽,汪雨汇,兰旭煮.木-混凝土组合梁螺钉连接件推出试验研究[J].哈尔滨工业大学学报,2012,44(增刊):231-234.
[10]俞宏,宋林,吴文清.木-混凝土组合梁剪力连接件研究现状[J].世界桥梁,2014,42(6):61-67.
[11]朱亚鼎.木-混凝土组合梁有限元分析[J].建筑结构,2014,44(增刊):234-237.
[12]Ceccotti A.Composite concrete-timber structures[J].Progress in Structural Engineering and Materials,2002,4(3):264-275.
[13]Girhammar U A,Pan D H.Exact static analysis of partially composite beams amd beam-columns[J].International Journal o Mechanical Sciences,2009,49(2):239-255.
[14]韦尘雨,胡夏闽.原木-混凝土组合梁螺钉连接件受剪承载力有限元分析[J].建筑结构学报,2015,36(增刊):395-400