| 柯晓军,安进,苏益声*,陈敏.高温后方钢管再生混凝土柱抗震性能试验研究[J].实验力学,2018,33(6):885~892 |
| 高温后方钢管再生混凝土柱抗震性能试验研究 |
| Experimental study on seismic performance of recycled aggregate concrete-filled square steel tube column after high temperature |
| 投稿时间：2017-03-27 修订日期：2017-05-10 |
| DOI：10.7520/1001-4888-17-076 |
| 中文关键词: 钢管混凝土(CFST) 再生骨料混凝土 拟静力试验 高温 抗震性能 |
| 英文关键词:Concrete filled steel tube (CFST) recycled aggregate concrete quasi-static experiment high temperature seismic performance |
| 基金项目:国家自然科学基金项目(51668007， 51508112， 51468003)，广西自然科学基金项目(2015GXNSFBA139210)，广西教育厅中青年教师基础能力提升项目(KY2016YB027， KY2016YB666)，广西重点实验室系统性研究项目(2016ZDX02) |
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| 中文摘要: |
| 本文进行了6个高温后方钢管再生混凝土柱试件和1个常温对比试件的拟静力试验，研究再生粗骨料取代率、受热温度和套箍指数对试件表观变化、破坏形态和抗震性能的影响。结果表明：高温后钢管表面氧化而呈现暗红色；在常温和高温作用下的试件破坏形态相似，均为钢管底部发生鼓曲破坏；除套箍指标较小的试件外，所有试件的滞回曲线比较饱满，变形满足抗震延性需求；上述这些受再生粗骨料取代率的影响不大，而受热温度影响显著，其中受热温度300℃时的损伤严重、性能劣化最为突出。 |
| 英文摘要: |
| In this paper, a quasi-static experiment was carried out for 6 recycled aggregate concrete filled steel tubular columns which were subjected to high temperature treatment and 1 contrastive specimen which was in normal temperature environment. The purpose is to study the effect of replacement rate of recycled coarse aggregate, heating temperature and hoop index on the apparent change, failure pattern and seismic performance of specimens. Experimental results show that the surface of tubular columns is oxidized and appears dark red after high temperature treatment; the failure patterns of all specimens are similar no matter what at room temperature and high temperature, both are caused by bulging failure at the bottom of the steel tube; the hysteretic curves of all specimens except for the specimen with small hoop index are plump, and the deformation can meet the requirements of seismic ductility; above these are not affected by the replacement rate of recycled coarse aggregate, but obviously by the heating temperature, among which, the damage is serious and the performance degradation is the most serious at 300℃. |
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