锈蚀钢筋混凝土偏压构件抗弯刚度有限元计算

Finite element calculation of flexural stiffness of corroded RC eccentric compressive members

采用有限元程序ANSYS,建立了同时考虑锈后钢筋力学性能下降、有效截面减少以及钢筋与混凝土粘结性能退化的锈蚀混凝土偏压构件有限元计算模型.将该模型与已有锈蚀钢筋混凝土偏压构件的试验研究资料进行对比,验证了所建有限元模型的可靠性.利用有限元模型,计算分析了纵筋锈蚀程度、纵筋直径以及箍筋间距对抗弯刚度的影响规律.

The decline of mechanical properties and effective section of corroded steel bar, deterioration of bond character between corroded reinforcement and concrete were considered. A finite element calculation model of corroded reinforced concrete （RC） eccentric compressive members was established by finite element software ANSYS. Reliability of the finite element model was demonstrated by comparing the results of the finite element calculation with the data of experiment. Based on the finite element analysis results, the influence of corrosion degree, the diameter change of the longitudinal reinforcing bars and the spacing change of stirrups on the flexural stiffness were calculated and analyzed.