钢纤维混凝土配筋梁落锤冲击试验研究  

Drop-weight test of reinforced concrete beams with steelfiber

作　　者：李亮[1] 姚云龙 陈柏生[2] 吴俊[1,3] 吴文杰 LI Liang;YAO Yunlong;CHEN Baisheng;WU Jun;WU Wenjie(The Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,BeijingUniversityof Technology,Beijing100124,China;College of Building Engineering,Hunan University,Changsha 410082,China;College of Rail Transit,Shanghai University of Engineering and Technology,Shanghai 201620,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]湖南大学土木工程学院,湖南长沙410082 [3]上海工程技术大学轨道交通学院,上海201620

出　　处：《混凝土》2019年第4期14-18,23,共6页Concrete

基　　金：国家重点基础研究发展计划(2015CB058003);北京市自然科学基金项目(8172010)

摘　　要：采用落锤冲击试验装置,进行了不同纤维含量的钢纤维混凝土配筋梁试件的抗冲击性能试验研究。获得了落锤冲击力、跨中位移及钢筋应变等试验结果,并记录了冲击荷载作用后试件裂缝的分布情况。根据试验结果对钢纤维混凝土配筋梁的动力响应特性、动态损伤过程以及内部能量耗散特点进行了分析和讨论。试验结果表明,钢纤维能够增强试件整体的韧性,增大冲击荷载作用时试件参与耗能区域的面积,从而提高试的件抗冲击承载能力;钢纤维含量越多,试件将在荷载作用全过程的受压阶段将消耗更多的能量,而在受拉阶段消耗的能量将减少。The impact-resistant behavior of fiber reinforced concrete(FRC)beams with different fiber contents was investigated by the drop-weight test.The impact load,mid-displacement and reinforced strain were recorded.The distribution of cracks in specimens after impact loading was also recorded.The dynamic response behavior,damage process and internal energy dissipation were analyzed based on the test data.The test results showed that steel fiber can enhance the toughness of specimen,and increase the area for energy dissipation when the impact load was applied,thus improve the resistance to impact loading.The more fiber content,the more energy was dissipated during the compression phase of the impact loading,and less energy was dissipated during the tensile phase.

关 键 词：钢纤维混凝土 配筋梁 落锤冲击试验 韧性 抗冲击性能 

分 类 号：TU528.572[建筑科学—建筑技术科学]