基于统一强度理论和拉梅解答的钢管混凝土柱承载力研究

Research on the bearing capacity of concrete-filled steel tubular column based on unified strength theory and lame solution

本文基于双剪统一强度理论推导的核心混凝土抗压强度公式,将拉梅解答引入钢管混凝土的计算中,再参考规范引入考虑长细比影响的承载力折减系数,得到新的钢管混凝土极限承载力计算方法,公式计算值与试验值吻合良好。最后,讨论极限承载力公式中系数k的取值,构建一种新的系数k的计算方法。本方法计算过程清晰、系数较少,研究成果丰富了钢管混凝土柱的计算理论,可为实际工程提供理论参考。

Based on the core concrete compressive strength formula derived from the twin shear strength theory,this paper applies Lame solution into the calculation of concrete-filled steel tube,introduces the reduction coefficient of bearing capacity considering the influence of the ratio of length to fineness according to the reference specification,and proposes a new calculation method of ultimate bearing capacity of concrete-filled steel tube.The value of coefficient k in the ultimate bearing capacity formula was discussed,and a new calculation method of coefficient k was constructed.The calculation process is simple with a reduced number of coefficients.This study enriches the calculation theory of concrete-filled steel tubular column,which can provide reference for practical engineering.