受酸性腐蚀的钢筋混凝土压弯结构非线性分析  

Nonlinear analysis of eccentrically loaded reinforced concrete structure eroded by acid

作　　者：胡琦[1] 蒋军[1] 葛炜[1] 朱国元[1] 

机构地区：[1]浙江大学建筑工程学院,浙江杭州310027

出　　处：《哈尔滨工业大学学报》2004年第12期1729-1732,共4页Journal of Harbin Institute of Technology

摘　　要：从混凝土的腐蚀机理入手,给出了受酸性介质腐蚀后混凝土强度和弹性模量的表达式,建立了数学计算模型.采用有限元法将结构划分为空间杆单元,给出了非线性弹性问题的单元刚度矩阵表达式,以及如何求解此类非线性问题的迭代方法.通过对一个工程的计算分析与实际情况相比较,该方法较为适合受酸性介质腐蚀压弯结构的刚度变化和变形发展分析.One formula of the intensity and elastic modulus of corroded reinforced concrete structure based on analyzing the mechanism of eroded concrete was proposed to establish mathematics model, and one formula of nonlinear stiffness matrix was proposed assuming that the load should not be unloaded, then proposed using iterative method to resolve nonlinear problems. Comparing the calculated result and practical result, it was detected that this method was adapt to analyze Stiffness changing and distortion developing of eccentrically loaded Reinforced Concrete Structure Eroded by Acid.

关 键 词：钢筋混凝土结构 腐蚀 非线性分析 刚度矩阵 

分 类 号：TU375[建筑科学—结构工程]