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| Restoring force model of steel reinforced recycled concrete filled circular steel tube composite columns under cyclic loading |
| Received:September 19, 2022 Revised:October 27, 2022 |
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| DOI：10.7511/jslx20220919001 |
| KeyWord:steel reinforced recycled concrete recycled concrete filled steel tube column resilience model skeleton curves hysteresis curves |
| Author | Institution |
| 马辉 |
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 ;西安理工大学 土木建筑工程学院, 西安 |
| 刘一 |
西安理工大学 土木建筑工程学院, 西安 |
| 赵艳丽 |
西安理工大学 水利水电土木建筑研究设计院, 西安 |
| 白恒宇 |
西安理工大学 土木建筑工程学院, 西安 |
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| Abstract: |
| 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. |
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