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首页> 外文会议>Tubular structures XIV >Experimental study on strength and ductility of steel tubular stub columns filled with Geopolymeric Recycled Concrete
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Experimental study on strength and ductility of steel tubular stub columns filled with Geopolymeric Recycled Concrete

机译：土工再生混凝土钢管短柱强度和延性的试验研究。

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Geopolymeric Recycled Concrete (GRC) is a new construction material which takes environmentalrnsustainability into account, by using alkali solution and fly ash to completely substitute Portland cementrnas well as by replacing natural coarse aggregate with recycled coarse aggregate. GRC could be used togetherrnwith steel hollow sections to form composite section. There is very limited study on such GRC filled tubularrnsections. This paper presents an experimental study on GRC filled tubular stub columns.A total of 12 specimensrnwere tested. The main parameters varied in the tests are: (1) two section sizes of square hollow sections (B×t)rnwith 200mm×6mm and 150mm×5 mm; (2) different concrete types: GRC and RecycledAggregate Concretern(RAC); (3) different Recycled Aggregate (RA) replacement ratios of 0%, 50% and 100%. The relationship ofrnload versus axial strain was recorded and analysed to compare the ultimate strength and failure mechanism.rnMeanwhile, the ductility of the columns was investigated by a ductility index (DI). The results show that thernultimate strength decreased with increasing RA contents for both GRC and RAC filled columns. The influence ofrnRA content on the strength was greater in GRC than that in RAC. The effect of RA content on the ductility of therncolumns was further investigated. Simulation method for predicting load versus strain relationship is discussedrnfor RAC and GRC filled steel tubular columns with different RA replacement ratios.
机译：地聚合物再生混凝土（GRC）是一种新型建筑材料，它通过使用碱溶液和粉煤灰完全替代硅酸盐水泥，并通过将天然粗骨料替换为再生粗骨料来考虑环境可持续性。 GRC可以与钢制空心型材一起使用以形成复合型材。此类GRC填充管状切面的研究非常有限。本文对GRC填充管式短柱进行了实验研究，共测试了12个样品。试验中变化的主要参数为：（1）方形空心截面（B×t）的两个截面尺寸分别为200mm×6mm和150mm×5mm； （2）不同的混凝土类型：GRC和再生骨料混凝土（RAC）； （3）不同的再生骨料（RA）替代率分别为0％，50％和100％。记录并分析了荷载与轴向应变的关系，以比较极限强度和破坏机理。同时，用延性指数（DI）研究了圆柱的延性。结果表明，对于GRC和RAC填充柱，最终强度随RA含量的增加而降低。在GRC中，rnRA含量对强度的影响大于在RAC中。进一步研究了RA含量对铝柱延展性的影响。讨论了具有不同RA置换比的RAC和GRC填充钢管柱的预测载荷与应变关系的仿真方法。

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