方钢管再生混凝土柱滞回性能影响因素数值分析

发布时间：2018-04-20 01:19

本文选题：方钢管再生混凝土柱 + 滞回性能　；参考：《防灾减灾工程学报》2016年06期

【摘要】：为了研究方钢管再生混凝土柱的滞回性能,采用有限元软件ABAQUS开展了不同设计参数下37个足尺试件的有限元拓展分析,揭示了变化参数对滞回性能指标的影响规律。结果表明:基于滞回性能指标需求,再生混凝土可以应用于方钢管混凝土工程承重结构之中。随着含钢率的增加,滞回曲线饱满度、初始弹性阶段刚度、峰值承载力和延性逐渐增大。随着钢材牌号的增大,试件滞回曲线饱满度、峰值承载力逐渐增大,而初始弹性阶段刚度、延性受影响较小。峰值承载力、延性随轴压比的增大而减小,但在同一级加载位移下的耗能系数逐渐增大。随着长细比的增加,滞回曲线的饱满度越来越低,试件的峰值承载力、延性和同级加载位移下的耗能系数明显减小。随着高宽比的增加,初始弹性阶段刚度、峰值承载力和延性逐渐提高,但同级加载位移下试件的耗能系数逐渐减小。
[Abstract]:In order to study the hysteretic behavior of recycled concrete filled square steel tube columns, the finite element expansion analysis of 37 full-scale specimens under different design parameters was carried out by using finite element software ABAQUS, and the influence of varying parameters on hysteretic performance was revealed. The results show that the recycled concrete can be applied to the load-bearing structure of concrete-filled square steel tube engineering based on the requirements of hysteretic performance index. With the increase of steel content, the hysteretic curve fullness, initial elastic stiffness, peak bearing capacity and ductility increase gradually. With the increase of steel grade, the hysteretic curve of the specimen is satiated, and the peak bearing capacity increases gradually, while the stiffness and ductility of the initial elastic stage are less affected. The peak bearing capacity and ductility decrease with the increase of axial compression ratio, but the energy dissipation coefficient increases gradually under the same loading displacement. With the increase of slenderness ratio, the satiety of hysteretic curve becomes lower and lower, and the peak bearing capacity, ductility and energy dissipation coefficient of the specimen under the same loading displacement decrease obviously. With the increase of the aspect ratio, the stiffness, peak bearing capacity and ductility of the specimen increase gradually in the initial elastic stage, but the energy dissipation coefficient of the specimen decreases gradually under the same loading displacement.
【作者单位】：河南理工大学土木工程学院;广西大学土木建筑工程学院;
【基金】：2017年河南省科技攻关项目 2016年安全生产重大事故防治关键技术科技项目(henan-0006-2016AQ) 河南省高等学校重点科研项目(15A560008) 焦作市2015年科技计划项目资助
【分类号】：TU398.9

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