摘要
依据预应力结构的粘结与破坏机理,在火灾温度场下,考虑高温区域内板梁材料参数的降低,采用非线性有限元的方法分析板梁的受力性能,得出高温下预应力钢绞线的应力松弛程度,并在合理假定条件下研究钢绞线随局部失效长度的变化,以及整根钢绞线发生粘结滑移情况,为桥梁的检测评定以及维修加固提供理论依据。
Based on the bond and failure mechanism of the pre-stressed structure and the material parameter depression in the temperature field under fire, this paper analyzed the mechanical behavior of the pre-stressed hollow slab by the non-linear finite element method, and obtained the pre-stressed steel strand stress relaxation under the high temperature. Under the reasonable hypothesis, the paper also studied the length change of the bond-slip of steel strand and the bond-slip of the whole steel provide theoretical basis for the bridge detection, evaluation and strengthening.
出处
《苏州科技学院学报（工程技术版）》
CAS
2009年第1期23-26,共4页
Journal of Suzhou University of Science and Technology （Engineering and Technology）
关键词
先张法板梁
粘结滑移
失效
预应力结构
pre-stressed hollow slab
bond-slip
cohesion failure
pre-stressed structure partial strand. cohesion failure The conclusions
