基于改进弹性补偿法的型钢混凝土结构极限承载能力分析方法  

Analysis method of limit carrying capacity of steel concrete structure based on improved elastic compensation method

作　　者：吴梓贤 张小飞[1,2] 骆文广 黄佳敏[1] WU Zixian;ZHANG Xiaofei;LUO Wenguang;HUANG Jiamin(School of Civil and Architechtural Engineering,Guangxi University,Nanning 530004,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2021年第8期694-700,共7页Engineering Journal of Wuhan University

基　　金：国家自然科学基金资助项目(编号:51569004)。

摘　　要：针对传统弹性补偿法仅能适用于单一材料结构体系的不足,结合型钢混凝土结构的基本特点,在传统弹性补偿法的基础上,引入了基于Drucker-Prager屈服准则的混凝土材料等效应力计算方法和单元承载比等概念,并定义破坏强度的概念和与之相关的常数λ,以反映混凝土材料进入屈服后仍未失稳破坏的特性。对传统弹性补偿法的弹性模量调整策略和极限承载能力求解方法进行改进,经算例验证后,将改进后的方法应用于型钢混凝土闸墩的极限承载能力计算中。研究结果表明,采用改进的方法计算型钢混凝土结构的极限承载能力是可行的,能在满足精度要求的前提下较好地满足迭代收敛条件。In view of the current deficiency that the traditional elastic compensation method can only be applied to the structural system of a single material, combining with the basic characteristics of steel-reinforced concrete structures, the concrete material equivalent stress calculation method based on the Drucker-Prager yield criterion and the concept of element bearing ratio are introduced on the basis of the traditional elastic compensation method. The concept of the failure strength and the constant λ associated with it are defined to reflect the characteristics of the concrete material without buckling after yielding. The elastic mode adjustment strategy and limit carrying capacity solution method of traditional elastic compensation method are improved.The study is verified and applied to the calculation of the limit carrying capacity of the steel concrete gate pier.The research results show that it is feasible and effective to use the improved method to calculate the ultimate bearing capacity of steel reinforced concrete structure under different working conditions,and it can satisfy the iterative convergence condition well on the premise of satisfying the accuracy requirement.

关 键 词：型钢混凝土结构 极限承载能力 弹性补偿法 

分 类 号：TV662.2[水利工程—水利水电工程]