（昆明理工大学建筑工程学院， 昆明 650500）

［摘要］在结构的设计使用年限内，钢筋混凝土结构不仅要承受荷载作用，而且要承受环境介质的侵蚀作用。环境介质的侵蚀使混凝土和钢筋劣化，结构承载能力降低，构件劣化达到一定的程度时将影响其正常使用。钢筋混凝土结构中钢筋的性能劣化对混凝土的构件的使用寿命起着决定性作用。从梁底受力纵筋锈蚀入手，假定钢筋混凝土梁端锚固可靠，锈蚀钢筋只在梁中发生粘结滑移。利用ANSYS软件分析受力钢筋在不同锈蚀率下，对钢筋混凝土梁极限承载力的影响，为混凝土结构可靠性评估打下基础。

［关键词］钢筋锈蚀； 极限承载力； 粘结滑移； ANSYS

中图分类号： TU375    文献标识码： A    文章编号： 1002-848X(2015)S2-0396-04

Analysis of the ultimate bearing capacity of corroded beam on the base of ANSYS

 Zhao Weidong， Peng Zhichao

 （ Institute of Architectural Engineering of Kunming University of Science and Technology, Kunming 650500, China）

Abstract: In the structure′s design life, the reinforced concrete structure not only bear the load, but also withstand the environmental media erosion. The erosion of the environmental media makes concrete and rebar degrade, reduces the bearing capacity of the structure. Reaching a certain extent, it will affect their normal use. The degradation of rebar plays a decisive role. From the beam bottom longitudinal reinforcement corrosion to start, assuming the anchoring of reinforced concrete is realiable at the end of the beam, the bond-slip only occurred in the beam other than the end of beam. Ultimate bearing capacity of reinforced concrete beam in different corrosion rate of reinforced stress on the base of ANSYS was analyzed, it makes a foundation for structural reliability assessment.

Keywords: steel corrosion; ultimate bearing capacity; bond-slip; ANSYS

作者简介：赵卫冬，硕士，Email:562598783@qq.com。