摘要
针对锈蚀钢束与混凝土间存在的粘结与滑移问题,基于桥梁分析中常用梁单元的特点,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。
Considering the problem of bond and slip between rusty steel strands and concrete,this paper analyzed this problem based on the feature of beam element which is always used in bridge calculation.In the paper,the formula of Saenz and Skogman were applied separately to show the stress-strain constitutive relationship of concrete and pre-stressed tendons.And nonlinear spring was used to simulate the bond and slip between rusty steel strands and concrete.Meanwhile this paper provided a analytical method：rigid arm element-nonlinear spring element-steel element.Then a case study was calculated and the result approved the availability of the method applied in pre-stressed concrete bridge.
出处
《价值工程》
2011年第4期58-60,共3页
Value Engineering
基金
陕西省自然科学基础研究资助基金青年人才项目(2009JQ7005)
关键词
预应力混凝土桥梁
锈蚀
本构关系
粘结滑移
非线性分析
pre-stressed concrete bridge
corrosion
constitutive relationship
bond and slip
nonlinear analysis
