开槽式钢筋混凝土楼板试验研究  

Experimental study of slotted reinforced concrete slab at shear wall-slab interface

作　　者：邓开来[1] 潘鹏[2] 张东彬[3] 李伟[3] 李一昕[3] 

机构地区：[1]清华大学土木工程安全与耐久教育部重点实验室,北京100084 [2]清华大学北京市钢与混凝土组合结构工程技术研究中心,北京100084 [3]清华大学土木工程系,北京100084

出　　处：《建筑结构学报》2016年第4期26-31,共6页Journal of Building Structures

基　　金：国家科技支撑计划(2011BAJ09B01);清华大学自主科研项目(2014Z22067)

摘　　要：震后功能可恢复结构已成为地震工程的研究热点。在剪力墙间设置的耗能连梁可用于震后功能可恢复联肢剪力墙结构,并且可与上部钢筋混凝土楼板分开设置。耗能连梁受损后容易实现震后更换,但楼板在地震作用下会出现较大的损伤且不易修复。为了减小楼板的地震损伤,提出了一种开槽式楼板,其主要特征是在楼板与剪力墙相接的界面处,设置一定宽度的槽口并用聚苯板填充。聚苯板的存在能够耗散结构的地震能量,避免混凝土板出现较大的损伤。设计制作6块混凝土楼板,包括4块传统钢筋混凝土楼板与2块开槽式楼板,通过试验比对了大变形时楼板的裂缝宽度和极限变形能力,总结了开槽式楼板的破坏模式。结果表明,与传统楼板相比,开槽式楼板在控制裂缝宽度和提高极限变形能力等方面具有明显的优势。Development of earthquake resilient structure has become an important issue in earthquake engineering community. The energy dissipation coupling beam is widely used in earthquake resilient shear wall structures,and it is detached with the floor slab above. The floor slab above may sustain significant damage and is difficult to repair. A new slotted slab is proposed,which is aimed at reducing the damage of the slab in rare earthquakes. The main feature of the proposed slab is the slot configuration at the shear wall-slab interfaces,where is filled with polystyrene boards.The six slabs were designed, including four conventional slabs and two slotted slabs. Experimental study was conducted to investigate the distribution and width of the cracks,the ultimate deformation capacity of the slabs,and the damage modes of the slotted slabs. Compared with the conventional slab,the slotted slab presents notable advantages in term of crack width and ultimate deformation capacity.

关 键 词：钢筋混凝土楼板 剪力墙 耗能连梁 开槽构造 裂缝宽度 变形能力 

分 类 号：TU375.3[建筑科学—结构工程] TU317.1