首页|反复荷载下圆钢管型钢再生混凝土组合柱恢复力模型研究

反复荷载下圆钢管型钢再生混凝土组合柱恢复力模型研究

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为建立圆钢管型钢再生混凝土组合柱的恢复力模型,对11根圆钢管型钢再生混凝土组合柱试件进行了低周反复荷载试验研究,考虑了再生骨料取代率、配钢率及钢管径厚比等不同设计参数的影响,分析了组合柱的地震破坏形态及滞回性能.基于组合柱的力学特征及曲线形状,提出了圆钢管型钢再生混凝土组合柱骨架曲线的三折线参数模型,采用理论推导与数据拟合的方法确定了组合柱骨架曲线的模型参数.在此基础上,给出了组合柱的滞回规则和卸载规律,构建了组合柱的恢复力模型,计算滞回曲线与试验滞回曲线吻合良好,表明该恢复力模型较好地反映了反复荷载下组合柱的受力特征点及滞回性能,可为此类组合柱的推广提供技术参考.
Restoring force model of steel reinforced recycled concrete filled circular steel tube composite columns under cyclic loading
To establish the restoring force model of circular steel tubular composite columns filled with steel reinforced recycled concrete,11 specimens of the composite columns were tested under low cyclic loading.Considering the influence of different design parameters such as recycled aggregate replacement rates,steel ratio and diameter thickness ratio of the steel tubes,the seismic failure modes and hysteretic behaviors of composite columns were analyzed.Based on the mechanical characteristics and curve shapes of composite columns,a three-fold-line parameter model of the skeleton curves of composite columns was proposed,and the model parameters of the skeleton curves model are determined by theoretical derivation and data fitting.On this basis,the hysteresis rules and unloading law of the composite columns are established,and the restoring force model of composite column is constructed.The calculated hysteretic curve is in good agreement with the measured hysteresis curve,which shows that the restoring force model better reflects the stress of the composite columns under repeated loading feature points and the hysteretic performance,and can provide technical reference for this kind of composite column promotion.

steel reinforced recycled concrete,recycled concrete filled steel tube columnresilience modelskeleton curveshysteresis curves

马辉、刘一、赵艳丽、白恒宇

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西安理工大学省部共建西北旱区生态水利国家重点实验室,西安 710048

西安理工大学土木建筑工程学院,西安 710048

西安理工大学水利水电土木建筑研究设计院,西安 710048

型钢再生混凝土,钢管再生混凝土柱 恢复力模型 骨架曲线 滞回曲线

国家自然科学基金陕西省自然科学基础研究计划工程材料与结构加固福建省高等学校重点实验室(三明学院)开放基金

514084852022JM-258B170001-16

2024

10.7511/jslx20220919001

计算力学学报
大连理工大学 中国力学学会

计算力学学报

CSTPCD北大核心
影响因子：0.491
ISSN：1007-4708
年,卷(期)：2024.41(2)
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