【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.更多还原

【Abstract】 One formula of the intensity and elastic modulus of corroded reinforced concrete structure based on analyzing the mechanism of eroded concrete is proposed to establish mathematics model, and one formula of nonlinear stiffness matrix is proposed assuming that the load should not be unloaded, then proposes using iterative method to resolve nonlinear problems. Comparing the calculated result and practical result, it is detected that this method is adapt to analyze Stiffness changing and distortion developing of eccentrically loaded Reinforced Concrete Structure Eroded by Acid.更多还原