偏压作用下L形钢骨混凝土异形柱的非线性分析  

Nonlinear Analysis on L-Shaped Steel Reinforced Concrete Columns with Eccentric Compression

作　　者：徐亚丰[1] 侯晓曦[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第3期511-516,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省教育厅科研计划项目(20060691);沈阳市人才资源开发专项资金项目(2007140303002);沈阳建筑大学结构工程省级重点实验室开放基金项目(JG-200904)

摘　　要：目的提出计算L形钢骨混凝土(SRC)异形柱正截面承载力的有效方法,分析含钢率和混凝土强度等级对构件正截面承载力的影响.方法基于平截面假定和材料模型,利用数值积分法编制了适用于计算L形SRC异形柱正截面承载力的非线性程序,得出极限承载力的电算结果以及不同含钢率和不同混凝土强度等级的N-M相关曲线.结果在偏压作用下,含钢率的变化和混凝土强度等级的变化对N-M相关曲线影响明显,且极限承载力随含钢率和混凝土强度等级的提高而增大.结论笔者利用数值积分法分析了L形SRC异形柱正截面承载力的影响因素.此方法简单可行,可弥补实验与有限元分析的不足,为今后的研究工作奠定了基础.This paper proposes the effective method of calculating normal section bearing capacity of L-shaped SRC column,and analyzes the impact of ratio of reinforcement and concrete strength grade on normal section bearing capacity.It compiles nonlinear programs which are suitable for calculating normal section bearing capacity of L-shaped SRC column by numerical integral methods based on flat section assumption and material model.Then it reaches the computerization results of ultimate bearing capacity,and N-M curve under different ratio of reinforcement and concrete strength grade.Under eccentric compression,the changes of ratio of reinforcement and concrete strength grade have obvious impact on N-M curve.With the increase of the steel ratio and concrete strength grade,the bearing capacity of the columns increases.The paper also analyzes the influential factors of normal section bearing capacity of L-shaped SRC column by numerical integration method.The method is simple and practicable,and can make up for the shortage of the experiment and finite element analysis,laying the foundation for future research.

关 键 词：L形钢骨混凝土异形柱 正截面承载力 非线性 偏压 数值积分法 

分 类 号：TU398[建筑科学—结构工程]