Experimental study on steel reinforced high -strength concrete columns under cyclic lateral force and constant axial load
Experimental study on steel reinforced high -strength concrete columns under cyclic lateral force and constant axial load
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循环侧向力和恒定轴力作用下钢骨高强混凝土柱试验研究
DOI：
10.1016/j.engstruct.2016.07.018
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发表时间：
2016-10-15
影响因子：
5.5
通讯作者：
Zhang, Fasheng
中科院分区：
文献类型：
--
作者：
Zhu, Weiqing;Jia, Jinqing;Zhang, Fasheng
本文介绍了钢筋高强混凝土（SRHC）柱抗震性能的实验研究结果。共有21根SRHC柱在模拟地震荷载条件下进行了试验，主要试验参数为轴向荷载水平、箍筋布置、结构钢细节和螺柱。详细分析了这些参数对 SRHC 色谱柱性能的影响。试验结果表明，多箍筋和常用结构钢配比的SRHC柱表现出优异的抗震性能，适合在地震区高层建筑中使用。轴向载荷对能量耗散和变形能力有负面影响。马镫对覆盖层剥落时的初始刚度和侧向力影响不大，但对能量耗散和变形能力有积极影响。当有效约束指数较大或SRHC柱承受较大的轴向荷载时，结构钢的好处更加明显。结构钢还提高了箍筋的积极作用。建议SRHC柱采用多箍筋，以充分发挥结构钢的作用；此外，当SRHC柱承受较大轴向荷载时，应采用更多的结构钢。在早期装载阶段，螺柱并没有显着影响 SRHC 柱的性能。然而，带有螺柱的柱表现出更好的能量耗散和变形能力以及更慢的刚度退化。 (C) 2016 Elsevier Ltd. 保留所有权利。
This paper presents the results of an experimental study on the seismic behavior of steel reinforced high strength concrete (SRHC) columns. A total of 21 SRHC columns were tested under simulated earthquake loading conditions, and the major experimental parameters were the axial load level, stirrup arrangement, structural steel details and studs. The effects of these parameters on the behavior of the SRHC columns were analyzed in detail. The test results showed that SRHC columns with multiple stirrups and commonly used structural steel ratios demonstrated excellent seismic behavior and were suitable for use in high-rise buildings in seismic regions. The axial load had a negative effect on the energy dissipation and deformation capacity. Stirrups exhibited little effect on the initial stiffness and lateral force at cover spalling, but had a positive effect on the energy dissipation and deformation capacity. The benefit of structural steel was more obvious when the effective confinement index was larger or the SRHC columns were subjected to a greater axial load. Structural steel also improved the positive effect of the stirrups. It is suggested that multiple stirrups should be adopted in SRHC columns to provide full play to structural steel; in addition, more structural steel should be adopted when significant axial loads are applied to SRHC columns. Studs did not significantly affect the performance of SRHC columns during the early loading stage. However, columns with studs exhibited better energy dissipation and deformation capacity along with slower stiffness degradation. (C) 2016 Elsevier Ltd. All rights reserved.