THEORETICAL ANALYSIS OF HYSTERETIC BEHAVIOR OF FRP-CONFINED RC COLUMNS
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摘要: 在分别确定FRP、钢筋和核心混凝土在单调应力以及往复应力作用下的应力-应变关系模型的基础上,采用纤维模型法对FRP约束圆钢筋混凝土柱的M-和P-滞回曲线进行了计算,计算结果和试验结果吻合较好。在数值计算的基础上,分析了含FRP率、钢筋屈服强度、纵向配筋率、混凝土强度、轴压比和长细比等参数对FRP约束圆钢筋混凝土压弯构件M-和P-滞回关系骨架曲线的影响规律,最后建议了简化的滞回模型。Abstract: Based on the stress-strain models of FRP,steel bar and the confined concrete under cyclic loading,theoretical model for the analysis of moment-curvature and load-deflection relationship was put forward.The calculating results of the theoretical model are in good agreement with the test results.Based on the theoretical model,parametric analysis was performed to determine effects on the behavior of lateral load (P) versus lateral deflection () response.The parameters include:FRP ratio,steel strength,steel ratio,compressive strength of concrete,axial compression ratio and slenderness ratio.Simplified hysteretic models are recommended.
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Key words:
- FRP /
- cyclic loading /
- moment /
- curvature /
- hysteretic behavior
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