方钢管再生混凝土偏压长柱受力性能试验研究

发布时间：2018-04-26 22:05

本文选题：再生混凝土 + 方钢管　；参考：《建筑结构学报》2016年S2期

【摘要】：通过方钢管再生混凝土偏压长柱静力试验研究其受力性能,考虑了长细比、偏心距、截面含钢率及再生骨料取代率4种因素,同时使用DS2声发射信号分析仪对试验进行监测。得到了试件的破坏形态、荷载-位移曲线、荷载-应变曲线及声发射采集绘制混凝土损伤点3D定位图等数据,采用各规范对钢管再生混凝土偏压长柱承载力进行计算,并与实测结果进行比较。分析结果表明,随含钢率的增大,方钢管再生混凝土偏压长柱的刚度相应增大,含钢率越大其延性越好,而偏心距越大其刚度退化也越快,声发射仪器对混凝土损伤定位区域与实际破坏区域较吻合,建议采用GB 50936—2014《钢管混凝土结构技术规范》中给出的公式计算方钢管再生混凝土偏压长柱的承载力。
[Abstract]:The static test of recycled concrete filled square steel tube column under eccentric compression is carried out. Four factors are considered, such as the aspect ratio, eccentricity, section steel content and recycled aggregate replacement rate. At the same time, DS2 acoustic emission signal analyzer is used to monitor the test. The failure pattern, load-displacement curve, load-strain curve and 3D location map of concrete damage point were obtained. The bearing capacity of recycled concrete filled steel tube column under partial compression was calculated by various codes. The results are compared with the measured results. The results show that with the increase of steel content, the stiffness of recycled concrete filled square steel tube columns increases correspondingly, the ductility is better with the increase of steel content ratio, and the stiffness degradation is faster with the increase of eccentricity. The acoustic emission instrument is in good agreement with the actual damage zone. It is suggested that the formula given in GB50936-2014 "Technical Specification for Concrete-filled Steel Tubular structure" be used to calculate the bearing capacity of long-square steel tube concrete filled steel tubular columns under eccentric compression.
【作者单位】：河北农业大学城乡建设学院;中国建筑科学研究院建筑环境与节能研究院;
【基金】：河北农业大学理工基金项目(ZD201403)
【分类号】：TU398.9

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