CAJ | 학술논문

钢束锈蚀的混凝土桥梁非线性分析方法的研究,对于在役损伤的预应力混凝土桥梁的失效机理分析或耐久性评估都具有一定的意义.针对锈蚀钢束与混凝土间存在的粘结与滑移问题,以Saenz公式和Skogman公式分别作为混凝土和预应力钢束的应力-应变本构关系,采用非线性弹簧模拟,提出刚臂元-非线性弹簧元-钢束元的方法,对锈蚀钢束与混凝土之间的粘结滑移进行分析.并以具体工程实例进行了分析计算,证明了所提出的方法用于预应力混凝土桥梁关于钢束锈蚀非线性分析的有效性.
강속수식적혼응토교량비선성분석방법적연구,대우재역손상적예응력혼응토교량적실효궤리분석혹내구성평고도구유일정적의의.침대수식강속여혼응토간존재적점결여활이문제,이Saenz공식화Skogman공식분별작위혼응토화예응력강속적응력-응변본구관계,채용비선성탄황모의,제출강비원-비선성탄황원-강속원적방법,대수식강속여혼응토지간적점결활이진행분석.병이구체공정실례진행료분석계산,증명료소제출적방법용우예응력혼응토교량관우강속수식비선성분석적유효성.
Research of the method of nonlinear analysis of concrete bridge with corroded steel strands means a lot to the failure mechanism analysis and durability assessment about the existing damaged prestressed concrete bridges. With Considering the problem of bond and slip between rusty steel strands and concrete,the formulas of Saenz and Skogman were applied separately to show the stress-strain constitutive relationships of concrete and prestressed tendons.Nonlinear spring and an analytical method of rigid arm element-nonlinear spring element-steel strand element were used to simulate the bond and slip between rusty steel strands and concrete. A case study was conducted and the result proves that the effectiveness of the method applied for nonlinear analysis of corroded steel strands in prestressed concrete bridge.