钢-混凝土组合转换框架试验研究
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摘要
为研究钢-混凝土组合转换梁-矩形钢管混凝土柱构成的组合转换框架的受力性能,对1榀组合转换框架缩尺模型进行了竖向荷载和低周往复水平荷载试验。分析了组合转换梁在竖向荷载作用下的刚度及裂缝开展情况以及组合转换框架在水平往复荷载作用下的破坏特点、荷载-位移滞回曲线及骨架曲线、延性、屈服机制和耗能能力等力学性能。试验研究结果表明,在竖向荷载作用下,组合转换梁刚度大,抗裂性能好,满足结构正常使用要求;在水平荷载作用下,转换框架延性好,极限层间位移角大,滞回曲线对称、饱满,耗能能力强。
In order to study the mechanical behavior of composite transfer frame assembled by composite transfer beam and concrete filled rectangular steel tube columns,experiments with vertical loads and low cyclic reversed horizontal loads were performed on the model structure.For the transfer beam under vertical loads,the stiffness and the anti-crack capability were analyzed.The failure process,the load-displacement hysteretic behaviors,the displacement ductility and the energy dissipation capability were studied in low cyclic reversed horizontal loading tests.The experimental results indicate that,under vertical loads the transfer beam possesses high stiffness and desirable anti-crack capability and satisfies the service limit state.Under horizontal loading the transfer frame has desirable ductility and large interstorey drift capacity.The hysteresis loops are symmetric and plump-shapes,and the energy dissipation shows very good performance.
In order to study the mechanical behavior of composite transfer frame assembled by composite transfer beam and concrete filled rectangular steel tube columns,experiments with vertical loads and low cyclic reversed horizontal loads were performed on the model structure.For the transfer beam under vertical loads,the stiffness and the anti-crack capability were analyzed.The failure process,the load-displacement hysteretic behaviors,the displacement ductility and the energy dissipation capability were studied in low cyclic reversed horizontal loading tests.The experimental results indicate that,under vertical loads the transfer beam possesses high stiffness and desirable anti-crack capability and satisfies the service limit state.Under horizontal loading the transfer frame has desirable ductility and large interstorey drift capacity.The hysteresis loops are symmetric and plump-shapes,and the energy dissipation shows very good performance.
引文
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[2]赵进.预应力混凝土转换梁结构设计及施工过程有关问题的探讨[D].南京:东南大学,2006.(ZhaoJin.Discussion on some problems of design andconstruction course for prestressted concrete transfergirder structure[D].Nanjing:Southeast University,2006.(in Chinese))
[3]李玉荣.型钢混凝土梁式转换框架结构的试验和理论研究[D].杭州:浙江大学,2005.(Li Yurong.Experimental and theoretical study of transferringstructure for steel reinforced concrete beams[D].Hangzhou:Zhejiang University,2005.(in Chinese))
[4]聂建国.钢-混凝土组合梁结构-试验、理论与应用[M].北京:科学出版社,2005.(Nie Jianguo.Steeland concrete composite beams-experiment,theory andapplication[M].Beijing:Science Press,2005(inChinese))
[5]Nakanishi K,Kitada T,Nakai H.Experimental studyon ultimate strength and ductility of concrete filled steelcolumns under strong earthquake[J].Journal ofConstructural Steel Research,1999,51(3):297-319.
[6]韩林海.钢管混凝土结构[M].北京:科学出版社,2000.(Han Linhai.Concrete filled steel tubes[M].Beijing:Science Press,2000.(in Chinese))
[7]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.(Zhu Bolong.Seismic test of structure[M].Beijing:Seismological Press,1989.(in Chinese))
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