新型自复位柱脚节点的设计与应用
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摘要
在前人研究的基础上,提出了一种新型的自复位柱脚节点方案,将其应用于一个泥石流冲击试验中,详细分析了泥石流冲击荷载作用下,柱脚的抬升情况和被撞击柱的位移变化情况。试验结果表明:在泥石流冲击荷载作用下,柱底钢筋最小应变为零,柱脚能与基础顶部钢板分离,发生了柱脚提离;被撞击点的位移最终能恢复到最初水平,几乎无残余变形,自复位效果明显。
On the basis of previous studies,a new type of self-centering column base joint scheme is proposed,which is applied to a debris flow impact test. The uplift of the column foot and the displacement of the impacted column under the impact load of debris flow are analyzed in detail.The test results show that under the impact load of debris flow,the minimum strain of the steel bar at the bottom of the column is zero,the column foot can be separated from the steel plate at the top of the foundation,and the column foot can be lifted off; the displacement of the impact point can finally be restored to the original level,with almost no residual deformation,and the self-centering effect is obvious.
On the basis of previous studies,a new type of self-centering column base joint scheme is proposed,which is applied to a debris flow impact test. The uplift of the column foot and the displacement of the impacted column under the impact load of debris flow are analyzed in detail.The test results show that under the impact load of debris flow,the minimum strain of the steel bar at the bottom of the column is zero,the column foot can be separated from the steel plate at the top of the foundation,and the column foot can be lifted off; the displacement of the impact point can finally be restored to the original level,with almost no residual deformation,and the self-centering effect is obvious.
引文
[1]吕西林,陈云,毛苑君,等.结构抗震设计的新概念——可恢复功能结构[J].同济大学学报(自然科学版),2011,39(7):941-948.
[2] HOSEOK Chi. Development of post-tensioned column base connection for self-centering seismic resistant steel frame[D].West Lafayette:Purdue University,2009.
[3]鲁亮,江乐,李鸿,等,柱端铰型受控摇摆式钢筋混凝土框架抗震性能的振动台试验研究[J].振动与冲击,2016,35(4):193-198.
[4]王先铁,林麟珲,陈蜂梅,等,外张拉式自复位方钢管混凝土柱脚的受力性能和设计方法研究[J].西安建筑科技大学学报,2017,49(6):812-819.
[5]吴积善,田连权,康志成,等.泥石流及其综合治理[M].北京:科学出版社,1993.
[6]何晓英.浆体与级配颗粒组合条件下泥石流冲击特性试验研究[D].重庆:重庆交通大学,2014.
[7] Zeng Chao,Cui Peng,Su Zhiman,et al. Failure modes of reinforced concrete columns of buildings under debris flow impact[J]. Landslides,2014(9):1-11.
[2] HOSEOK Chi. Development of post-tensioned column base connection for self-centering seismic resistant steel frame[D].West Lafayette:Purdue University,2009.
[3]鲁亮,江乐,李鸿,等,柱端铰型受控摇摆式钢筋混凝土框架抗震性能的振动台试验研究[J].振动与冲击,2016,35(4):193-198.
[4]王先铁,林麟珲,陈蜂梅,等,外张拉式自复位方钢管混凝土柱脚的受力性能和设计方法研究[J].西安建筑科技大学学报,2017,49(6):812-819.
[5]吴积善,田连权,康志成,等.泥石流及其综合治理[M].北京:科学出版社,1993.
[6]何晓英.浆体与级配颗粒组合条件下泥石流冲击特性试验研究[D].重庆:重庆交通大学,2014.
[7] Zeng Chao,Cui Peng,Su Zhiman,et al. Failure modes of reinforced concrete columns of buildings under debris flow impact[J]. Landslides,2014(9):1-11.