期刊论文

Experimental research for flexural behavior on concrete beams with local corrosion fracture of strands

Wang, L.

中文

中南大学学报(自然科学版)

1672-7207

2018

49

10

2593-2601

10.11817/j.issn.1672–7207.2018.10.028

2015CB057705:国家重点基础研究发展计划（973计划） 51708477:国家自然科学基金 51678069:国家自然科学基金 gs201501:科技计划 201625:益阳市科技项目

本校为其他机构

为了研究钢绞线腐蚀断裂对后张预应力混凝土梁受弯性能的影响,制作5片混凝土梁,在不同部位进行电化学快速腐蚀使钢绞线发生局部断裂,然后对其进行静载试验,研究钢绞线局部断裂对混凝土梁裂缝扩展、挠度变形、破坏模式和极限承载力的影响,进而探讨局部断裂的混凝土梁抗弯承载力计算分析方法和抗弯性能数值模拟方法。研究结果表明:预应力筋局部锈蚀断裂对开裂荷载影响较小,但导致构件裂缝分布发生改变,裂缝数量减小,裂缝高度不均匀性明显;构件的破坏形式由断筋局部损伤及对应区域的截面内力共同决定,若断口处弯矩较大,则很可能引起少筋破坏;反之,钢绞线断裂对破坏形式影响较小;钢绞线断裂引起混凝...

In order to study the degradation bending property of the post tensioned prestressed concrete beam with the corroded and fractured strand,five kinds of beams were manufactured.An accelerated corrosion test was used to obtain different locally corroded and fractured strands,then all beams were subjected to static load test.The influences of local breakage of steel strands on the crack propagation,deflection deformation,failure mode and ultimate bearing capacity of concrete beams were studied.The calculation method of bending capacity of local fractured concrete beams and numerical simulation me...