辽宁工程技术大学学报（自然科学版）2017，Vol.36Issue(7)：718-723,6.DOI:10.11956/j.issn.1008-0562.2017.07.009
钢筋混凝土梁开裂后钢筋应力变化规律
Regularity on stress of steel bars in reinforced concrete beam after cracking
摘要
Abstract
Taking a reinforced concrete beam for example,this paper studied the regularity on the stress of steel bar in reinforced concrete structures after cracking.Finite element models of a simply supported beam under distributed loading and a continuous beam under distributed loading were built using ANSYS.Cracks with different widths,depths,and locations were simulated in these models.And then the maximum stress and distribution regularity were observed.The result of numerical simulation shows that the stress of steel bar is affected by cracks only on the section where cracks appear;the crack depth affects the stress of steel bar significantly,and the deeper the crack,the larger the stress of steel bar.The crack may change the location of maximum stress of steel bar in beams,which is from mid-span to the location of crack;the closer to mid-span the location of crack,the larger the maximum stress of steel bar.But ratio of stress increasing doesn't change with the shift of crack location.关键词
桥梁工程/钢筋混凝土梁/钢筋应力/开裂/裂缝宽度/裂缝深度Key words
bridge engineering/reinforced concrete beam/stress of steel bar/cracking/width of crack/depth of crack分类
交通工程引用本文复制引用
杨晓明,陈鹤,韩志强..钢筋混凝土梁开裂后钢筋应力变化规律[J].辽宁工程技术大学学报（自然科学版）,2017,36(7):718-723,6.基金项目
辽宁省教育厅2013年杰出青年学者成长计划(LJQ2013037) （LJQ2013037）
辽宁省自然科学基金(20170540414) （20170540414）
