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恢复力模型是描述钢筋混凝土结构在往复荷载作用下弹塑性性能的重要因素,对结构抗震性能和计算机模拟具有十分重要的意义。本文对4根混凝土梁的低周反复拟静力试验进行研究,通过变换CFRP-PCPs复合筋截面尺寸来研究低周反复荷载作用下CFRP-PCPs复合筋混凝土梁的滞回曲线和骨架曲线,进而提出了复合筋混凝土梁的恢复力模型。计算结果与试验结果的对比表明该模型的适用性良好。
The restoring force model is an important factor to describe the elastic-plastic behavior of reinforced concrete structures under reciprocating loads. It is of great significance to the seismic behavior of structures and computer simulation. In this paper, the low-cycle repeated quasi-static tests of four concrete beams are studied. The hysteresis curves and the skeleton curves of CFRP-PCPs reinforced concrete beams under cyclic loading are studied by changing the cross-sectional dimensions of the CFRP-PCPs composite bars. The restoring force model of composite reinforced concrete beam is proposed. Comparing the calculated results with the experimental results, the applicability of the model is good.