摘要
为了解既有裂缝对RC矩形梁受力性能的不利影响,进行了8根带裂缝（裂缝宽度0.7~1.2mm）混凝土矩形梁受力性能的对比试验研究。重点研究了既有裂缝对混凝土矩形梁受力性能、破坏模式和极限承载力的不利影响。研究结果表明,带裂缝RC矩形梁的屈服荷载有所降低,降低幅度为2.4%~22.0%;极限承载力略有降低,降低幅度为0.9%~10.7%;初始刚度略有降低。
RC rectangular beams usually have existing cracks because of deformation,shrinkage and overloading.Eight specimens which have different existing cracks were tested to investigate the unfavorable effect of existing cracks,and the width of existing cracks is 0.7~1.2 mm.The yield load-bearing capacities of RC rectangular beams with existing cracks decrease 2.4%~22.0% comparing to the control specimen,meanwhile the ultimate load-bearing capacities decrease 0.9%~10.7%.And the initial stiffness of RC rectangular beams with existing cracks have a slight decrease.
出处
《结构工程师》
2010年第2期142-145,共4页
Structural Engineers
基金
"十一五"国家科技支撑计划(2006BAJ03A10)资助
关键词
既有裂缝
RC矩形梁
力学性能
破坏模式
existing crack
RC rectangular beam
mechanical property
failure mode
