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首页> 外文期刊>Bulletin of earthquake engineering >Cyclic test and numerical study of precast segmental concrete columns with BFRP and TEED
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Cyclic test and numerical study of precast segmental concrete columns with BFRP and TEED

机译：BFRP与预制节段混凝土柱的循环试验与数值研究

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摘要

Previous studies on the seismic behaviour of precast segmental concrete column revealed that concrete crushing and spalling damages may occur at the toes of the segments due to rocking between segments at the joints. In addition, the energy dissipation capacity of segmental column is smaller than the conventional monolithic column. Energy dissipation bars therefore have been proposed to increase its energy dissipation capability, which, unfortunately, at the cost of also increasing the residual displacement of the column, hence degrades the most advantageous characteristic of precast segmental column. To solve these problems, this paper proposes wrapping the segments with basalt fibre-reinforced polymer (BFRP) to reduce the concrete compressive damage and tension-only external energy dissipation (TEED) devices to dissipate energy without substantially increasing the residual displacement. Experimental cyclic tests and numerical simulations are carried out to examine the effectiveness of the proposed method. The results show that the damage of the segments could be effectively reduced by using BFRP, and the columns show good ductility and almost no strength degradation. The TEED devices are effective to increase the energy dissipation capacity of the column without significantly increasing the residual displacement.
机译：以前关于预制节段混凝土柱的地震行为的研究表明，由于关节的区段之间的摇摆，在段的脚趾上可能发生混凝土压碎和剥落损坏。另外，节段柱的能量耗散能力小于常规整体柱。因此，已经提出了能量耗散杆来提高其能量耗散能力，遗憾的是，遗憾的是，在增加柱的残余位移的成本下，因此降低了预制节段柱的最有利特征。为了解决这些问题，本文提出用玄武岩纤维增强聚合物（BFRP）包裹段，以减少混凝土抗压损坏和张力外部能量耗散（TEED）器件，以消散能量而不会增加残余位移。进行实验循环试验和数值模拟，以检查所提出的方法的有效性。结果表明，通过使用BFRP可以有效地减少段的损伤，柱子显示出良好的延展性，并且几乎没有强度降解。这种装置有效地增加柱的能量耗散能力，而不会显着增加残余位移。

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