带型钢肋预制混凝土底板和叠合板的试验研究

为研究一种新型预制型钢肋底板混凝土叠合板的受力性能,以跨度、肋高、肋宽、型钢厚度作为主要变量,对4块带型钢肋预制混凝土底板和2块叠合板进行了静载试验,得到了底板和叠合板的破坏形态、荷载-挠度曲线、型钢荷载-应变曲线,分析了其破坏机理、变形特性以及裂缝发展规律。结果表明,型钢肋与混凝土整体受力较好;增大试件肋宽、肋高均使得试件刚度和抗裂性能提高,增大试件跨度会降低其极限承载力、刚度和恢复性能;采用自然粗糙面的叠合面抗剪性能良好,可达到与整浇板相同的受力性能。

Experimental Research on Precast Concrete Panel with Section Steel Rib and Its Composite Slab

In order to study the mechanical behavior of a new type of prefabricated steel ribbed concrete composite slabs,the static load tests of four prefabricated concrete panels with steel ribbed and two laminated slabs were carried out with span,rib height,rib width and section steel thickness as main variables.The failure mode,load-deflection curve and steel load-strain curve of the slabs were obtained,and the failure mechanism,deformation characteristics and crack development law were analyzed.The results show that the overall force of steel and concrete ribs is better.Increasing the rib width and rib height of the specimens can increase the stiffness and crack resistance of the specimen.Increasing the span of the specimen can reduce its ultimate bearing capacity,stiffness and recovery performance.The laminated surface with natural rough surface has good shear resistance and can achieve the same mechanical behavior as the integral plate.