湖南大学学报（自然科学版）2025，Vol.52Issue(5)：128-140,13.DOI:10.16339/j.cnki.hdxbzkb.2025054
钢筋套筒挤压连接装配式混凝土梁冲击试验研究
Research on Impact Test of Precast Concrete Beam with Pressed Steel Sleeve Connections
摘要
Abstract
To investigate the behavior of precast concrete(PC)beams with pressed steel sleeves under impact loads,a total of 6 beams with pressed steel sleeves connection of 3 different assembly types,and 2 cast-in-place reinforced concrete(RC)beams were tested under free-falling drop-weights,while 4 corresponding beams were tested under static load.The assembly form included mid-span splice,end splice,and composite beam forms.The research focused on the effects of different hammer masses and impact velocities on the dynamic responses of the precast concrete beams under the same impact energy,including failure modes,mid-span deflection,impact force,and deformation energy.The results obtained are as follows:the failure modes and crack development of RC and PC beams with different splicing types are basically consistent,but the cracks in mid span splicing beams are more concentrated at the splicing part,and the overlapping of splicing sections and impact positions is more unfavorable to the structure.The pressed steel sleeve is reliable as the assembly and connection form of precast concrete beams.When the impact energy of 6 762 J remains unchanged,the increase of impact mass from 230 kg to 400 kg has little effect on the peak impact force.But the average impact force has increased,and the increase in amplitude of the three types of splicing PC beams exceeds 25%.The maximum deformation energy consumption of PC beams with different splicing types is equivalent to that of RC beams,with a ratio of input energy ranging from 50%to 70%.Except for the mid-joint precast beam,increasing the impact mass at the constant energy increased the maximum deformation energy consumption of the test beam more than 15%.关键词
钢筋套筒挤压连接/装配式混凝土梁/冲击荷载/动力响应Key words
pressed steel sleeve connection/precast concrete beams/impact loading/dynamic response分类
建筑与水利引用本文复制引用
陈庆军,李云龙,王英涛,姚妙金,何展超,蔡健..钢筋套筒挤压连接装配式混凝土梁冲击试验研究[J].湖南大学学报（自然科学版）,2025,52(5):128-140,13.基金项目
国家自然科学基金资助项目(52178139),National Natural Science Foundation of China(52178139) （52178139）
广东省基础与应用基础研究基金资助项目(2024A1515012518),Guangdong Basic and Applied Basic Research Foundation(2024A1515012518) （2024A1515012518）
