木-混凝土组合梁受力性能试验研究
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摘要
为了揭示木-混凝土组合梁受力性能,设计、制作了3根剪力连接水平不同的木-混凝土组合梁模型。通过静力加载试验,得到了荷载-滑移曲线、荷载-挠度曲线和组合梁跨中应变分布。研究表明:在相同荷载作用下,组合梁的交界面相对滑移、跨中挠度、承载力随着剪力连接度的降低而递减;随着荷载增加,交界面相对滑移量增大,组合梁不再符合平截面假定;传统抗弯刚度计算公式不再适用于组合梁,应给予适当折减。
In order to reveal the mechanical properties of Timber-Concrete Composite(TCC) beam,three different levels of shear connection Timber-Concrete Composite(TCC) beams have been designed and constructed.Through the static loading test,the load-slip curve,the load-deflection curve and the strain distribution across the mid span beam were obtained.The results show that under the same load,the relative slip,the mid span deflection and the bearing capacity of Timber-Concrete Composite(TCC) beam decrease with the decrease of the shear connection.With the increase of load,the relative slip of the interface increases,and Timber-Concrete Composite(TCC) beam is no longer conformed to the assumption of the flat section.The traditional formula of bending stiffness is no longer applicable to Timber-Concrete Composite(TCC) beam,and proper reduction should be given.
In order to reveal the mechanical properties of Timber-Concrete Composite(TCC) beam,three different levels of shear connection Timber-Concrete Composite(TCC) beams have been designed and constructed.Through the static loading test,the load-slip curve,the load-deflection curve and the strain distribution across the mid span beam were obtained.The results show that under the same load,the relative slip,the mid span deflection and the bearing capacity of Timber-Concrete Composite(TCC) beam decrease with the decrease of the shear connection.With the increase of load,the relative slip of the interface increases,and Timber-Concrete Composite(TCC) beam is no longer conformed to the assumption of the flat section.The traditional formula of bending stiffness is no longer applicable to Timber-Concrete Composite(TCC) beam,and proper reduction should be given.
引文
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[3] GUTKOWSKI R,BROWN K,SHIGIDI A.Investigation of notched composite wood-connections[J].Journal of Structural Engineering,2004,130(10):1553-1561.
[4] 江雨辰,胡夏闽,曹雪娇,等.胶合木-混凝土组合梁螺钉连接件推出试验研究[J].南京工业大学学报(自然科学版),2016,38(5):74-80.
[5] 周银,胡夏闽,曹雪娇.滑移效应对木-混凝土组合梁抗弯刚度的影响分析[J].江苏建筑,2013(2):34-36.
[6] 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(增刊1):371-376.
[7] STOJIC D,CVETKOVIC R.Analysis of a composite timber-concrete structures according to the limit states[J].Journal of Architecture and Civil Engineering ,2001,2(2):169-184.
[8] BLASS H J,SCHLAGER M.Trag-und verformungsverhalten von holzverbundkonstrukionen[J].Bauen mit Holz,1996(5):392-398.
[9] STEINBERG E,SELLE R.FAUST T.Connectors for timber-lightweight concrete composite structures[J].Journal of Structural Engineering,ASCE,2003,129(11):1538-1545.
[10] 汪雨汇.木-混凝土组合梁受力性能研究[D].南京:南京工业大学,2012.
[11] 彭虹毅.木-混凝土组合梁试验研究[D].南京:南京工业大学,2010.
[12] 贺国京,冷骏,彭乐宁.木-混组合梁槽口钉类连接件抗剪承载力计算方法研究[J].世界桥梁,2016,44(6):41-45.
[13] 胡夏闽,薛伟,曹雪娇.钢混凝土组合梁挠度计算的附加曲率法[J].建筑结构学报,2010(增刊1):385-389.
[14] CEB-FIP Model Code 1990:CEB-FIP MC 90[S].London:Telford House,1993.
[15] BAZAN I M M.Ultimate bending strength of timber beams[D].Nova Scotia Canada:Technical University of Nova Scotia,1980.
[2] 袁帅,贺国京,易锦,等.胶合木-混凝土组合梁抗弯刚度分析[J].建筑科学,2018,34(15).
[3] GUTKOWSKI R,BROWN K,SHIGIDI A.Investigation of notched composite wood-connections[J].Journal of Structural Engineering,2004,130(10):1553-1561.
[4] 江雨辰,胡夏闽,曹雪娇,等.胶合木-混凝土组合梁螺钉连接件推出试验研究[J].南京工业大学学报(自然科学版),2016,38(5):74-80.
[5] 周银,胡夏闽,曹雪娇.滑移效应对木-混凝土组合梁抗弯刚度的影响分析[J].江苏建筑,2013(2):34-36.
[6] 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(增刊1):371-376.
[7] STOJIC D,CVETKOVIC R.Analysis of a composite timber-concrete structures according to the limit states[J].Journal of Architecture and Civil Engineering ,2001,2(2):169-184.
[8] BLASS H J,SCHLAGER M.Trag-und verformungsverhalten von holzverbundkonstrukionen[J].Bauen mit Holz,1996(5):392-398.
[9] STEINBERG E,SELLE R.FAUST T.Connectors for timber-lightweight concrete composite structures[J].Journal of Structural Engineering,ASCE,2003,129(11):1538-1545.
[10] 汪雨汇.木-混凝土组合梁受力性能研究[D].南京:南京工业大学,2012.
[11] 彭虹毅.木-混凝土组合梁试验研究[D].南京:南京工业大学,2010.
[12] 贺国京,冷骏,彭乐宁.木-混组合梁槽口钉类连接件抗剪承载力计算方法研究[J].世界桥梁,2016,44(6):41-45.
[13] 胡夏闽,薛伟,曹雪娇.钢混凝土组合梁挠度计算的附加曲率法[J].建筑结构学报,2010(增刊1):385-389.
[14] CEB-FIP Model Code 1990:CEB-FIP MC 90[S].London:Telford House,1993.
[15] BAZAN I M M.Ultimate bending strength of timber beams[D].Nova Scotia Canada:Technical University of Nova Scotia,1980.