CFRP-PCPs复合筋混凝土偏压柱承载力计算分析

摘要

在17根碳纤维预应力棱柱体复合筋(carbon fiber reinforced plastics prestressed concrete prisms,简称CFRP-PCPs复合筋)混凝土偏压柱试验研究的基础上,对CFRP-PCPs复合筋混凝土柱的承载力进行理论分析,提出复合筋混凝土柱的破坏分为混凝土压碎的受压破坏和碳纤维筋被拉断的受拉破坏两种模式,研究了复合筋混凝土偏压柱受压破坏时的承载力计算方法.基于平截面假定和复合筋材料特性,推导出考虑二阶效应系数的复合筋混凝土柱极限承载力计算式,计算值与试验值吻合较好.%On the basis of experiment study on seventeen CFRP-PCPs composite reinforced concrete eccentric compression columns,theoretical analysis of bearing capacity of CFRP-PCPs composite reinforced concrete columns is carried out.Two possible failure modes of composite reinforced concrete columns (compressive failure of concrete and tensile failure of CFRP plate rupture) are proposed in this paper.The calculation method of bearing capacity of composite reinforced concrete eccentric columns of compressive failure is studied.Based on flat section assumption and material properties of the composite reinforcement,the formula for calculating bearing capacity of composite reinforced concrete columns with second order effect coefficient is derived.The calculated results are in good agreements with the measured results.