Consecutive and constant low-velocity drop-weight impact loading tests for statically flexural compression failure-type RC beams strengthened with AFRP sheet
Consecutive and constant low-velocity drop-weight impact loading tests for statically flexural compression failure-type RC beams strengthened with AFRP sheet
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AFRP 板加固静态弯曲压缩破坏型 RC 梁连续恒定低速落锤冲击载荷试验
DOI：
10.11532/structcivil.66a.1059
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
瓦井 智貴，小室 雅人，岸 徳光，三上 浩，田野 順也
中科院分区：
文献类型：
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作者：
麓隆行;戸松功祐， 山田悠二，川崎佑磨，横井克則;瓦井 智貴，小室 雅人，岸 徳光，三上 浩，田野 順也
为了建立RC构件的抗冲击升级方法，对芳纶纤维增强聚合物（AFRP）板弯曲加固的静态弯曲压缩破坏型RC梁进行了连续、恒定的低速落锤冲击载荷试验。连续下落300公斤的重物，直到梁达到极限状态。选择两种跌落高度：H=0.5m；和 1.0 m。研究结果如下：（1）无论加载次数如何，梁的动力响应时程几乎相似； (2)尽管RC梁在高能单次荷载作用下由于板材破裂而达到极限状态，但在连续低速冲击荷载作用下，由于梁上部混凝土保护层的压缩破坏而达到极限状态。
In order to establish an impact resistant upgrading method for RC members, consecutive and constant low-velocity drop-weight impact loading tests for statically flexural compression failure-type RC beams strengthened in flexure with Aramid Fiber Reinforced Polymer (AFRP) sheet were conducted. A 300 kg weight was consecutively dropped until the beams reach the ultimate state. Two kinds of drop height were selected: H= 0.5 m; and 1.0 m. The results obtained from this study were as follows:(1) time histories of the dynamic responses of the beams are almost similar irrespective of number of loading times; and (2) even though the RC beams reached ultimate state due to sheet rupture under a single loading with high energy, the beams reached ultimate state due to compression failure at the upper concrete cover of the beam under consecutive and low-velocity impact loading.