预应力带肋板与叠合板抗弯性能试验

Experimental Research on Flexural Performance of Prestressed Ribbed Slab and Composite Slab

目的研究预应力带肋板和预应力带肋叠合板的抗弯受力性能,为在实际工程中的应用以及数值模拟分析提供参考依据.方法采用自行设计的预应力带肋板与叠合板,分别对预应力带肋板与预应力带肋叠合板进行均布加载试验,并采用ABAQUS软件进行模拟与试验数据对比,通过试验数据、试验现象分析力学性能.结果净跨4 640 mm的预应力(肋宽:120 mm、肋高:70 mm)带肋板在预应力度λ=0.47,施工荷载2 k Pa作用时,施工期间不需要加设支撑,可以满足承载力、挠度和变形要求;预应力带肋叠合板的最大跨度通过计算可以达到5 100 mm.预应力带肋叠合板的挠度、裂缝在达到使用荷载时均满足要求.预应力带肋叠合板的结合面没有出现起皮、错层现象.结论新型的预应力带肋叠合板具有制作工序简单、整体性能良好的优点,且板上所凸起的肋取代了常见叠合板结构中的桁架筋,既节约了大量钢筋,又能够满足施工过程中的吊装要求.

This article is aimed to study the flexural performance of prestressed ribbed slab and prestressed ribbed composite slab to provide the reference in engineering and the numerical simulation. The self-designed prestressed ribbed slab and composite slab are adopted and distributed loading. The experimental data were compared with the data from the ABAQUS software. The mechanical properties of the specimens were analyzed by the test data and the experimental phenomena. The results show that prestressed ribbed plate does not need additional support and can meet the requirements of the bearing capacity, deflection and deformation during construction in the condition of prestressed degree of 0. 47 and the construction load of 2 kPa,4 640 mm span. The maximum span of prestressed ribbed composite slab can reach 5 100 mm. The deflection and crack of the prestressed ribbed composite slab meets the requirements when the service load is reached. The faying face has no phenomenon of peeling and staggered. The prestressed ribbed composite slab has the advantages of simple production process and good overall performance. The convex rib on the prestressed ribbed plate replace the truss rib in the common laminated plate structure, which can saves a lot of reinforcement and also meet the lifting requirements in the construction process.