无粘结部分预应力混凝土柱抗震性能的试验
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摘要
为研究外加轴压比和预加轴压比对试验柱抗震性能以及恢复性能的影响,对5根无粘结部分预应力混凝土框架柱进行拟静力试验研究.研究结果表明:随着外加轴压比的增加,柱的抗震耗能性能增强,开裂荷载基本不变,屈服荷载和极限荷载提高,但延性降低,复位能力降低.随着柱的预加轴压比的增加,其耗能能力下降,开裂荷载基本不变,但屈服荷载有小幅增加,极限荷载降低.预加轴压比对柱子延性的影响较小,在达到极限荷载之前,预加轴压比低的柱复位性能稍好,但达到极限荷载之后,预加轴压比高的柱拥有更强的复位能力.
In order to study the influence of axial compression ratio and pre-axial compression ratio on the seismic behavior and recovery performance of unbounded partially prestressed concrete frame column, we presented five unbounded partially prestressed concrete frame columns for the pseudo-static tests. The research results indicate that: with the increase of the applied axial compression ratio, the cracking load has no obvious change, and the column seismic capacity yield load and ultimate load is increased, but it has small reset ability. The column which has bigger applied axial compression ratio has high initial stiffness. Enhancing pre-axial compression ratio, the seismic capacity decreased while cracking load does not change, but there is a slight increase in yield load while ultimate load decreases. Pre-axial compression ratio has little effect on the ductility. The larger smaller pre-axial compression ratio of the column has a stronger reset capability before reaching the ultimate load, but after reaching it, the larger pre-axial compression ratio of the column has a stronger reset capability.
In order to study the influence of axial compression ratio and pre-axial compression ratio on the seismic behavior and recovery performance of unbounded partially prestressed concrete frame column, we presented five unbounded partially prestressed concrete frame columns for the pseudo-static tests. The research results indicate that: with the increase of the applied axial compression ratio, the cracking load has no obvious change, and the column seismic capacity yield load and ultimate load is increased, but it has small reset ability. The column which has bigger applied axial compression ratio has high initial stiffness. Enhancing pre-axial compression ratio, the seismic capacity decreased while cracking load does not change, but there is a slight increase in yield load while ultimate load decreases. Pre-axial compression ratio has little effect on the ductility. The larger smaller pre-axial compression ratio of the column has a stronger reset capability before reaching the ultimate load, but after reaching it, the larger pre-axial compression ratio of the column has a stronger reset capability.
引文
[1]谢春.近场地震作用下钢筋混凝土框架柱抗震性能试验研究[D].长沙:湖南大学,2011.
[2]张鑫,梁汝鸣,韦合,等.配置预应力无粘结高强钢绞线混凝土柱的试验研究[J].工业建筑,2007,37(11):81-84.
[3]GB 50011-2010,建筑抗震设计规范[S].
[4]GB 50010-2010,混凝土结构设计规范[S].
[5]王清湘,林立岩.高强混凝土柱延性的试验研究[J].建筑结构学报,1995,16(4):22-31.
[6]章宇明.密肋复合墙板损伤模型及基于损伤性能目标的抗震设计方法研究[D].西安:西安建筑科技大学,2006.
[7]郭蓉.加固方钢管混凝土框架的抗震性能试验与理论研究[D].天津:天津大学,2007.
[2]张鑫,梁汝鸣,韦合,等.配置预应力无粘结高强钢绞线混凝土柱的试验研究[J].工业建筑,2007,37(11):81-84.
[3]GB 50011-2010,建筑抗震设计规范[S].
[4]GB 50010-2010,混凝土结构设计规范[S].
[5]王清湘,林立岩.高强混凝土柱延性的试验研究[J].建筑结构学报,1995,16(4):22-31.
[6]章宇明.密肋复合墙板损伤模型及基于损伤性能目标的抗震设计方法研究[D].西安:西安建筑科技大学,2006.
[7]郭蓉.加固方钢管混凝土框架的抗震性能试验与理论研究[D].天津:天津大学,2007.
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