FRP-混凝土短柱极限承载力的新解和探讨

在Mohr-Coulomb强度准则的基础上，提出矸咿．混凝土短柱极限承载力计算时的基本假定，考虑截面有效约束和混凝土单轴抗压强度的影响，利用极限平衡法推导了FRP-混凝土短柱的极限承载力新解，通过与文献试验结果的比较，验证了理论公式的正确性，并得出核心混凝土极限抗压强度提高值、混凝土单轴抗压强度及FRP筒约束程度的影响特性。该结果为FRP-混凝土短柱的极限承载力分析提供了理论依据，对实际工程设计有一定的参考价值。

New Solution and Discussion of Ultimate Bearing Capacities of FRP-Conerete Stub Columns

Some premises are brought forward with calculating ultimate bearing capacity of FRP-concrete stub column. Based on Mohr-Coulomb strength criterion and with use of ultimate balance method, new solution of ultimate bearing capacities for FRP-concrete stub column is presented, considering the effects of section effective restriction and unaxial compressive strength of concrete. The results of the proposed new formula are found in good agreement with experiment results. The effects of the unaxial compressive strength of concrete and extent of restriction for FRP on the enhancement of ultimate compressive strength for core concrete are discussed. This solution has an important practical value for engineering application.