HPFL预制空心楼盖板整体性研究

通过3种工况模拟地震作用下板下墙体的破坏,研究高性能水泥复合砂浆钢筋网(HPFL)薄层作为板的叠合层对预制空心楼盖板整体性加固的效果.试验结果表明,板下不同位置支撑墙体破坏后,试件按空心板横向悬挑板受力,板端部产生向下挠曲,空心板横向悬挑长度为2块板宽(1 000mm),叠合层与空心板未发生剥离;HPFL作为预制空心板的叠合层能有效提高预制空心楼盖板的整体性,使空心板在水平面的2个垂直方向都连续,成为水平面内任意向刚度接近无穷大的横向构件,使得结构的整体性及抗震性能得到保证.

Integrity Research on Precast Concrete Hollow Slabs

The reinforcement effect of the high performance ferro-cement laminates (HPFL) was investigated as composite covers of precast concrete hollow slab on the integrity of precast concrete hollow slabs by three conditions under simulated earthquakes action. The results have shown that slabs and composite covers have not debonded after the destruction of the supporting wall at different locations, even two hollow slabs cantilevered at lateral. As the composite cover of precast hollow plate, HPFL can effectively improve the integrity of precast hollow floor slab, make hollow slab continuous at two vertical directions of horizontal direction, and any stiffness of the horizontal components in this plane approaches infinity, so that structural integrity and earthquake resistant performance of hollow slabs are guaranteed.