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混杂FRP加固腐蚀混凝土柱抗震性能试验

Keywords: 腐蚀,混杂,纤维增强聚合物,抗震性能

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Abstract:

为了研究外贴混杂纤维增强聚合物(fiberreinforcedpolymer,简称FRP)加固腐蚀混凝土柱的抗震特性,对10根柱进行了低周反复加载试验,其中4根柱为对比柱,3根柱直接采用混杂FRP加固,其余3根柱在腐蚀后采用混杂FRP加固.试验研究了轴压比、配箍率对腐蚀柱抗震性能的影响.结果表明:钢筋腐蚀在一定程度上使混凝土柱的破坏呈明显的脆性;混杂FRP可以有效地改善腐蚀柱的抗震性能,延性和耗能能力提高显著,但承载力提高有限;当腐蚀率为5.1%时,混杂FRP加固腐蚀柱的位移延性系数、累积耗能与腐蚀未加固柱相比,最大可分别提高123%和12.5倍.

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