CFRP-CFST轴压柱承载力理论研究进展

CFRP-钢管混凝土结构是将CFRP缠绕粘贴于钢管混凝土构件外围,形成三种材料组合的圆柱状构件。CFRP钢管混凝土构件可以充分发挥三向受压混凝土抗压强度高的优点,使得承载力得以提高。从CFRP-钢管混凝土轴压柱承载力的影响因素入手,讨论基于不同方法的承载力计算公式,包括极限平衡法、全过程分析法、欧拉公式法、长细比折减系数法。最后通过对承载力从强度破坏定义到失稳破坏定义的探讨,指出承载理论存在的问题以及发展趋势。

STATE-OF-THE-ART THEORY OF BEARING CAPACITY FOR CONCRETEFILLED CFRP-STEEL TUBULAR COLUMNS WITH AXIA COMPRESSION

The concrete filled CFRP-steel tubular structure( CFST is wrapped by the CFRP) is a cylindrical member which is made of three materials. CFRP-CFST can perform the advantages of the high strength for concrete under triaxial compression,and it has higher bearing capacity. Starting with the influencing factors of the concrete-filledCFRP-steel tubular columns with axia compression,the calculation formula of ultimate bearing capacity based on different methods are discussed,which includes limit equilibrium method,the whole process of analysis,Euler's formula method and slenderness ratio reduction coefficient method. Finally,through the discussion of the definition of bearing capacity from strength failure to buckling failure,the problems and the development trend of the theory of loads are summarized.