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为研究预制-现浇拼合楼板与现浇式楼板在静力荷载作用下的受力性能及破坏机理,对6个足尺的钢筋混凝土楼板进行了拟静力加载试验,并对楼板的裂缝发展情况、跨中挠度、钢筋和混凝土应变以及受力性能进行研究。结果表明:预制-现浇拼合楼板具有良好的受力性能,破坏形式为两端拼缝处的剪切破坏;预制-现浇拼合楼板两端拼缝的存在,使得楼板跨中裂缝宽度和跨中挠度减小;与现浇混凝土楼板相比,跨中混凝土开裂荷载相差不大,说明现浇板与拼合板抗裂性能相当;同时预制-现浇拼合楼板在结构设计时应适当增大拼缝处局部构造配筋。
In order to study the mechanical behavior and failure mechanism of prefabricated-cast-in-place floor slab and cast-in-place floor under static load, six full-length reinforced concrete slabs were subjected to quasi-static loading test and the development of cracks Condition, mid-span deflection, reinforcement and concrete strain and force behavior. The results show that the prefabricated-cast-in-place floor has good stress performance and the failure mode is the shear failure at both ends of the joint; the existence of the joint at both ends of the prefabricated-in-place floor makes the width and span The deflection is less; compared with the cast-in-place concrete slab, the cracking load of the mid-span concrete is not much difference, which shows that the anti-cracking performance of the cast-in-place slab and the splint is equivalent; Seams at the local structure of reinforcement.