Analytical Study on Mechanical Characters of RC Beams Damaged by Corrosion of Reinforcement

本研究的目的是应用混合惩罚法（HPM）的方法来解析解释钢筋腐蚀损伤的RC梁的极限抗力和力学行为。为了研究混凝土的本构规律、钢筋腐蚀裂缝的建模以及引入混凝土与钢筋粘结-滑移关系的分析表达式，将HPM分析结果与钢筋混凝土梁的加速恒流腐蚀单调加载试验结果和刚体-弹簧模型（RBSM）分析结果进行了比较。研究结果表明：1)HPM是钢筋滑动破坏和混凝土拉伸裂缝弹性分析和非线性分析的有效方法。2)为了用HPM表达钢筋腐蚀损伤后RC梁承载能力和刚度的降低，有必要引入裂缝的建模。钢筋的腐蚀及混凝土与钢筋的粘结滑移关系。

The purpose of this study is to apply the method of Hybrid-type Penalty Method (HPM) in order to explain analytically the ultimate resistance and the mechanical behavior of RC beams damaged by corrosion of reinforcement. In order to investigate the constitutive law of concrete, the modeling of the cracks due to corrosion of reinforcement and the expression on analysis of introducing the bond-slip relationship between concrete and reinforcement, the analytical results obtained by HPM were compared with the experimental ones of monotonic loading tests on RC beams with an accelerated galvanostatic corrosion method and the analytical ones obtained by Rigid-Body-Spring-Model (RBSM).The conclusions obtained are as follows:1)HPM is the effective method of elastic analysis and nonlinear analysis of sliding failure of steel and tensile crack of concrete.2)In order to express the reduction in load carrying capacity and stiffness of RC beams damaged by corrosion of reinforcement by using HPM, it is necessary to introduce the modeling of the crack due. to the corrosion of reinforcement and the bond-slip relationship between concrete and reinforcement.