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高温后方钢管再生混凝土柱抗震性能试验研究
Experimental Study on Seismic Behavior of Recycled Aggregate Concrete-filled Square Steel Tube Columns after High Temperature
投稿时间: 2017-03-27  最后修改时间: 2017-05-10
DOI:
中文关键词:  钢管混凝土  再生混凝土  拟静力试验  高温  抗震性能
英文关键词:CFST  recycled aggregate concrete  quasi-static test  high temperature  seismic behavior
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
柯晓军 广西大学 xj-ke@163.com 
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中文摘要:
      该文进行了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、受热温度和套箍指标对试件表观变化、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,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:
      Based on quasi-static tests of six recycled aggregate concrete-filled square steel tube columns after high temperature and one contrastive specimen, this paper introduces the change laws of surface change, failure mechanisms and seismic behaviour caused by three parameters of recycled coarse aggregate replacement rate, high temperature and confinement index. Test results show that the surface color of square steel tube is dark red due to oxidation. The failure pattern of all specimens is similar under the room temperature and high temperature. The main phenomenon is that the bottom of square steel tube buckles. Beside the specimen with less confinement index, all hysteretic curves are plump, and the deformation can meet the seismic ductility demand. These are slight variations in recycled coarse aggregate replacement rate, and remarkable effects from the change of high temperature.
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