高延性混凝土T型肋叠合楼板的底板性能试验研究

Experimental study on performance of high ductility concrete T-ribbed composite floor slabs

为研究由装配整体式高延性混凝土(HDC)、带肋叠合板(PK板)、冷弯薄壁型钢组成的T型肋叠合楼板(HTPKG板)底板受力性能,通过HTPKG预制底板试件的重物均布加载静载试验,研究了HTPKG板的刚度、承载力等力学性能。分析跨度、上翼缘宽度、腹板宽度等因素对HTPKG板受压性能和承载力影响规律,选出最优板型。试验结果表明:在加载至4.4~4.5 k N时板底跨中位置均出现了裂缝,极限荷载下未出现脆断现象,说明HTPKG板具有较好的承载力和延性特征,HTPKG-4板的受力性能最佳。

In order to study the mechanical performance of the bottom plate of the T-ribbed composite slab(HTPKG slab)composed of assembled monolithic high ductility concrete(HDC),ribbed composite slab(PK slab)and cold-formed thin-wall steel,the static load test of four HTPKG prefabricated slab specimens was carried out to study the stiffness and bearing capacity of HTPKG slab.The influence of span,upper flange width and web width on the compression performance and bearing capacity of HTPKG slab is analyzed,and the optimal slab type is selected.The test results show that cracks appear in the middle of the bottom span of the four components when loaded to 4.4~4.5 kN respectively,and no brittle fracture occurs until the extreme loading,indicating that the HTPKG plate has good bearing capacity and ductility characteristics.The performance of HPTKG-4 is the best.