摘要
通过对3根配置高强度碳纤维棒高炉渣混凝土梁和3根高炉渣钢筋混凝土梁正截面受弯性能进行对比试验,发现配置碳纤维棒主筋的高炉渣混凝土梁的正截面受弯性能较高炉渣钢筋混凝土梁略有下降,主要表现为:除1根配置碳纤维棒主筋的高炉渣混凝土梁破坏荷载能达到设计要求外,其余两根梁破坏荷载分别能达到设计荷载的99%和95%;梁体裂缝发展明显更快,且裂缝宽度更大,碳纤维棒拉断时,梁体裂缝基本在1.4mm左右。针对裂缝超宽的问题,提出在梁侧增设腰筋的方式以限制裂缝的开展,并进行了理论分析和计算。经试验验证,该方法能有效抑制裂缝的发展,减小跨中挠度,能满足设计和使用要求。
By comparison tests on the normal section bending performance of three blast furnace slag concrete beams with high strength carbon fiber rod and three blast furnace slag reinforced concrete beams,it is found that the normal section bending performance of former beams has a slight decline compared with the latter beams. It mainly features as follows. The failure load of a blast furnace slag concrete beam with the carbon fiber rod as main bars can meet the design requirements,and the other two beams can reach 99% and 95% of the designed load respectively. Crack development of beam is significantly faster,and the crack width is bigger. When the carbon fiber rod is pulled off,the beam crack basically is about 1. 4mm. In order to solve the problem of extra-wide cracks,the way to reinforce the steel bar on the beam side was proposed to limit the development of the crack,and the theoretical analysis and calculation were carried out. The experiment proves that the method can effectively restrain the development of cracks and reduce the mid-span deflection.Design and use requirements can be met.
出处
《建筑结构》
CSCD
北大核心
2017年第6期65-69,共5页
Building Structure
基金
"工业固态废弃物土木工程综合开发利用"四川省高校重点实验室资助项目(SC_FQWLY201401)
关键词
碳纤维棒
正截面受弯性能
裂缝
高炉渣混凝土梁
carbon fiber rod
normal section bending performance
crack
blast furnace slag concrete beam
