纤维增强聚合物复合材料-钢复合圆管约束混凝土轴压性能预测模型

纤维增强聚合物复合材料（FRP）-钢复合圆管约束混凝土由于具有很好的综合性能，近年来得到了广泛的研究，尚缺乏完整的应力-应变关系全曲线计算模型。本文在综合作者现有研究成果的基础上，广泛收集了96个FRP-钢复合圆管约束混凝土柱的轴心受压试验结果，系统分析了试件参数的影响规律，提出了FRP-钢复合圆管约束混凝土的应力-应变关系曲线的完整计算模型，包括峰值应力、峰值应变、极限应力和极限应变的计算方法，并建议了应力-应变关系全曲线预测模型，模型较好地预测了FRP-钢复合圆管约束混凝土的应力-应变关系曲线的特征，预测结果与试验结果吻合较好。建议模型具有较好的通用性和准确性。

Models for predicting axial compression behavior of fiber reinforced polymer-steel composite circular tube confined concrete

Fiber reinforced polymer (FRP)-steel composite circular tube confined concrete has been studied extensively in recent years due to its excellent comprehensive properties, however, a complete computational model to predict the stress-strain curve is still lacking. On the basis of the author's existing research results, the axial compression test results of 96 FRP-steel composite circular tube confined concrete columns were extensively collected and the influence rule of specimen parameters was systematically analyzed, a complete calculation model of stress-strain curve of FRP-steel composite circular tube confined concrete was presented, including the calculation methods of peak stress, peak strain, ultimate stress and ultimate strain, and the prediction model of the whole stress-strain curve was proposed. The model can predict the characteristics of the stress-strain curve of FRP-steel composite circular tube confined concrete, and the predicted results are in good agreement with the test results. The proposed model has good universality and accuracy.