预制梁板跌落损伤与抗弯性能试验研究  

Experimental study on dropping damage and flexural performance of prefabricated beam and slab

作　　者：许锦峰[1] 朱文祥[1] 吴志敏[1] 张海遐[1] XU Jinfeng;ZHU Wenxiang;WU Zhimin;ZHANG Haixia(Jiangsu Province Key Laboratory of Research of Green Building and Structural Safety,Jiangsu Jianke Technique of Energy-conservation for Buildings Co.,Ltd.,Jiangsu Research Institute of Building Science Co.,Ltd.,Nanjing 210008,China)

机构地区：[1]江苏省建筑科学研究院有限公司江苏建科节能技术有限公司江苏省绿色建筑与结构安全重点实验室,江苏南京210008

出　　处：《混凝土》2020年第9期107-111,共5页Concrete

基　　金：国家十三五重点研发计划项目资助(2016YFC0701402)。

摘　　要：为了探索预制构件从高空跌落损伤对其力学性能的影响,进行了2组共计6根预制梁与板的跌落试验与抗弯承载力的对比试验,重点研究预制梁与板的破坏形态,对比分析了不同跌落高度对构件极限抗弯承载力的影响。研究结果表明:初始损伤对预制梁与板的极限抗弯承载力有一定的影响,与未跌落的预制梁与板相比,跌落后的梁承载力分别对应降低0.11%与5.51%,跌落后的板极限承载力分别对应降低3.69%与9.52%,极限承载力下的挠度也对应大于未跌落的试件。In order to explore the influence of high-altitude dropping damage on the mechanical properties of prefabricated components,comparing tests between the dropping and flexural capacity of total six prefabricated beams and slabs were carried out.Tests focused on the dropping and the final damage of prefabricated beams and slabs,and the impact of different dropping height on the ultimate flexural capacity of members were also comparatively analyzed.The results show that initial damage has a certain influence on the ultimate flexural capacity of prefabricated beams and plates.Compared with no-fallen prefabricated members,the bearing capacity of the falling beams were reduced by 0.11%and 5.51%,respectively,while the falling slabs were reduced by 3.69%and 9.52%,respectively.The deflection under the ultimate bearing capacity is also larger than those no-fallen specimens.

关 键 词：预制梁板 跌落损伤 抗弯承载力 

分 类 号：TU528.01[建筑科学—建筑技术科学]