Shake Table Tests of Large-Scale Substandard RC Frames Retrofitted with CFRP Wraps before Earthquakes
Shake Table Tests of Large-Scale Substandard RC Frames Retrofitted with CFRP Wraps before Earthquakes
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DOI：
10.1061/(asce)cc.1943-5614.0000720
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发表时间：
2017-02
影响因子：
4.6
通讯作者：
Daiyu Wang;Zhenyu Wang;Tao Yu;Hui Li
中科院分区：
文献类型：
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作者：
Daiyu Wang;Zhenyu Wang;Tao Yu;Hui Li
摘要 世界各地的潜在地震区存在大量不合格的钢筋混凝土（RC）框架。在未来可能发生的强烈地震中，这些框架面临很高的倒塌风险。为了降低风险，迫切需要对这些框架进行震前抗震加固。本文通过振动台试验对采用外部粘合碳纤维增强聚合物 (CFRP) 复合材料加固的不合格 RC 框架的抗震性能进行了实验研究。制作了两个 1/2 比例的 4 层 2 间 RC 框架，并在振动台上进行了测试。首先测试一个样本作为对照样本，而另一个样本在测试前用 CFRP 进行改装。改造方案是根据对照试件的破坏模式设计的，在框架下两层梁柱节点及其附近采用碳纤维布包裹。试验结果表明，不合格的RC框架的抗震性能可...
AbstractA large number of substandard reinforced concrete (RC) frames exist in potential earthquake regions across the world. These frames are at high risk of collapse during possible strong earthquakes in the future. In order to mitigate the risk, pre-earthquake seismic strengthening of these frames is urgently needed. This paper presents an experimental study on the seismic performance of substandard RC frames strengthened with externally bonded carbon-fiber-reinforced polymers (CFRP) composites using shake table tests. Two 1/2-scale 4-story and 2-bay RC frames were fabricated and tested on a shake table. One specimen was tested first as the control specimen, while the other specimen was retrofitted with CFRP before test. The retrofitting scheme was designed according to the failure mode of the control specimen, and involved CFRP wrapping at and close to the beam-column joints at the lower two stories of the frame. The test results showed that the seismic performance of the substandard RC frame could be...