| 引用本文: | 应文剑,王永辉,翟希梅.冲击荷载作用下内嵌泡沫铝耗能节点试验[J].哈尔滨工业大学学报,2018,50(12):171.DOI:10.11918/j.issn.0367-6234.201802056 |
| YING Wenjian,WANG Yonghui,ZHAI Ximei.Experimental study of aluminum foam filled energy absorption connectors under impact loading[J].Journal of Harbin Institute of Technology,2018,50(12):171.DOI:10.11918/j.issn.0367-6234.201802056 |
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| 摘要: |
| 为吸收爆炸时产生的爆炸能量以及减少建筑物所受到的爆炸荷载,提出一种连接防爆幕墙和建筑物的内嵌泡沫铝新型耗能节点.通过冲击试验对这种节点的耗能性能进行试验研究,探究了泡沫铝填充、折板厚度等参数对此节点构件耗能性能的影响.试验结果表明:冲击过程中泡沫铝填充的耗能节点试件,其受压阶段包括弹性、塑性和致密化阶段,可通过钢折板塑性变形以及泡沫铝受压密实过程实现冲击能量的吸收与消耗,而无泡沫铝填充的节点试件仅依靠折板塑性变形转动耗能.在试验结果基础上,利用LS-DYNA有限元软件建立了耗能节点构件的精细化有限元模型,并对冲击试验结果进行了验证,得到了吻合程度较好的力-位移曲线.试验和有限元分析表明,内嵌泡沫铝新型节点构件耗能性能优良,泡沫铝填充可以明显改善此类耗能节点的耗能性能. |
| 关键词: 冲击荷载 爆炸 耗能节点 泡沫铝 耗能性能 |
| DOI：10.11918/j.issn.0367-6234.201802056 |
| 分类号:TU395 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51608151) |
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| Experimental study of aluminum foam filled energy absorption connectors under impact loading |
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YING Wenjian1,2,WANG Yonghui1,2,ZHAI Ximei1,2
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(1.Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China; 2.Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters (Harbin Institute of Technology), Ministry of Industry and Information Technology, Harbin 150090, China)
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| Abstract: |
| To absorb blast energy and reduce blast load on buildings during explosion, a novel energy absorption connector filled with aluminum foam was proposed. Lateral impact loading tests on the proposed energy absorption connectors were conducted to study their energy absorption performance. In the tests, effects of filled aluminum foam and plate thickness on the energy absorption performance of the connectors were investigated. Force-displacement curves of the connectors with aluminum foam showed three stages, including elastic deformation, plastic deformation and aluminum foam densification stage. The plastic deformation of pleated plate and compression of aluminum foam contributed to energy absorption, while the connectors without aluminum foam only relied on plastic deformation to absorb energy. The FE models of the connectors were established utilizing LS-DYNA and then validated with the tests results. It was proved that the proposed connectors showed considerable energy absorption performance which could be largely improved by filling the connector with aluminum foam. |
| Key words: impact loading explosion energy absorption connector aluminum foam energy absorption performance |
