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低周荷载下FRP约束RC矩形空心墩的抗震性能试验研究

DOI: 10.3969/j.issn.1674-0696.2013.sup.1.24, PP. 827-831

Keywords: 桥墩,纤维增强复合材料,拟静力试验,抗震性能,矩形空心截面,bridgepier,FRP,quasi-statictest,anti-seismicperformance,rectangularhollowsection.

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Abstract:

:?为了评价FRP约束RC空心墩的抗震性能,设计并制作了5个未约束和FRP约束矩形空心墩,并进行了恒轴压、水平单向低周反复荷载下的拟静力试验。通过对比分析了不同试验墩的滞回曲线、水平力和延性、总耗能和耗散系数。结果表明:FRP约束矩形空心墩的塑性铰区,可提高其抗侧刚度、改善其耗能能力和延性、提高其变形能力,且空心墩的抗震滞回耗能能力较稳定,但是,对水平力的影响较小。此外,耗散系数与总耗能的变化趋势不同,因此,评价RC空心墩耗能能力时,应综合考虑总耗能和耗散系数。

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